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Enlarge / Postal inspectors routinely investigate child pornography cases in the US.Joshua Lot/Getty Images reader comments 27 Share this story "[Rev.

Dr.] Jim [Parkhurst] plays guitar, sings in a symphony chorus, loves to hike, does crossword puzzles, and is an avid reader. He enjoys spoiling his twin nephews on annual trips to our national parks in the west." -Post announcing Parkhurst's new job, January 2015 In 2013, federal agents investigating the child pornography collection of one David S.

Engle—who was later sentenced in Washington state to 25 years in prison—came across a new set of eight images.

The pictures showed five boys, ranging in age from around seven to 15, urinating outdoors, shaving their pubic hair, and posing naked in bathtubs. According to an affidavit from Postal Inspector Maureen O'Sullivan, who helped investigate the images, the photo set was "emerging and being widely distributed and traded by child pornography collectors on a national and international scale." Being new and uncatalogued, the images were forwarded to the National Center for Missing and Exploited Children (NCMEC), which maintains a vast database on prohibited images for use in investigations and image blacklists. While law enforcement generally focuses on finding those who create and/or trade child pornography, a simultaneous effort is made to identify—and if necessary to secure—the victims.

At the federal level, this task is centralized within NCMEC at the Child Victim Identification Program (CVIP)—and this new image set wound up at CVIP accordingly.

The investigation of the pictures, which took three years to complete, opens a rare window into the world of digital detectives who specialize in tracing some of the world's most horrific imagery. An Embassy Suites hotel room—but which one? It turns out that federal agents largely run an investigation the way most of us would: on the public Internet. CVIP took the obvious first step and pulled all the Exchangeable Image File (EXIF) metadata from the photos.

Amazingly, this data had never been scrubbed (even Facebook scrubs EXIF metadata from uploaded photos for security and privacy reasons).

Though the images were not tagged with GPS locations, they did have dates attached.

This would become a crucial clue. Without names and dates, finding the photos' creator would be difficult.

Even if one could identify a particular hotel used in a photo, the huge number of possible dates would make guest check-in registries nearly worthless.

But with a date, identifying a particular hotel might solve the case immediately. To that end, CVIP agents looked through a subset of the pictures that had been taken in a hotel room on August 20, 2010.

Background items suggested a location in Colorado, while the décor of the room hinted at an Embassy Suites hotel.

To find out which hotel, CVIP "compared rooms in the images to online photos of hotel rooms in all of the Embassy Suites in the area." (This sounds like either a Google image search or a careful look at the Embassy Suites website.) The team decided that the location was the Embassy Suites in Denver. The information was sent back to the postal inspectors, who fired off a subpoena to Embassy Suites for everyone registered at a "small subset of the hotel's rooms" on the date in question. However, the registry turned up no clear leads.

The trail went cold. Let me Google that for you In February 2015, CVIP came back to the postal inspectors with new data. Unrelated investigations around the country had turned up additional images from the set, showing the same boys in Western locations, many of them outdoors. James Parkhurst UMC EXIF data revealed that these photos were taken two days earlier than the others, and one additional boy was now pictured. More importantly, "a particular landmark" in the new photos offered a specific location: a cabin within the Antero Hot Springs cabins in Salida, Colorado. In March 2015, the owner of the cabins sent postal inspectors information on guest rentals from the time. On the day the photos there had been taken, the cabin in question had been rented to "James Parkhurst" and three guests. Rather than delving into some super-secret law enforcement database, agents turned to Google and Facebook to ID Parkhurst. Quick searches revealed a 55-year-old man with the same name who lived in Portland and was working as the Executive Director of Camp and Retreat Ministries for the United Methodist Church's Oregon-Idaho Conference. A search of Facebook pages belonging to Parkhurst and his family members showed conversations about trips to national parks—along with names and (non-sexual) photos of the five boys in the prohibited image series. Three of the boys, it turned out, were sons of Parkhurst's cousin.

The other two were twins, both adopted from Vietnam by Parkhurst's brother. The full Facebook This discovery led to an August 2015 search warrant for the Facebook accounts of Parkhurst, the five boys, and their parents.

Cross-referencing the conversations and pictures returned by the social network with the prohibited images and their EXIF data, investigators sketched out specific dates and times during which Parkhurst appeared to be on trips alone with the boys in locations matching those in the prohibited photos. For instance, the earliest photos dated to August 2008, when Parkhurst allegedly took all five boys on a trip to Las Vegas, the Hoover Dam, and Yosemite National Park.

As part of that trip, the group stopped at Travertine Hot Springs and Buckeye Hot Springs.
Inspectors found references to both places on a public website devoted to naturism ("nudity is commonplace").

Another stop, at El Dorado Hot Springs, was listed on a separate site as one of the "best places for nude camping in Arizona." With another prohibited image, investigators used "public search engines" to identify a particular hotel in Mariposa, California.

As confirmation of the location, traveler pictures on a "hotel review website" matched the bathroom amenities and décor in the prohibited photo.
Still more images were identified based on "landmarks that are searchable on Google" or by matching one pond to "an online image of the Olympic Hot Springs in Olympic Park, Washington." Travertine Hot Springs in California. gastondog Revenge of the thumbnail Several of the photos from the set were circulating among child pornography collectors in cropped versions, with the pictures usually altered to remove an adult or to focus attention on the genitals. But the crops didn't hide the original image completely.
Investigators found that several of the image files still held thumbnail versions of the original image. One of these smaller but un-cropped images showed, in O'Sullivan's words, "Parkhurst nude next to [one of the boys]." Secret databases Assembling the case against Parkhurst eventually moved beyond open source information. Law enforcement periodically busts allegedly "legitimate" businesses selling things like "naturist films from around the world" that are actually child pornography. When that happens, investigators seize and archive all sales records for future investigations. For instance, in 2006, postal inspectors and the Los Angeles police raided Insider Video Club, which dealt in "DVDs, VHS tapes, and still images of nude men and boys;" the company's database was then seized.

And in October 2010, Toronto police shut down Azov Films, which specialized in this material, and they sent a copy of the sales database to the US. As part of the Parkhurst investigation, postal inspectors ran his name against these kinds of sales databases—and found hits at both Azov and Insider Video Club. Parkhurst had allegedly ordered Swim Party for $24.95 back in 1997 and Boys in the Mud in 2005 for $45.95.

Each video showed nude young boys and contained "no meaningful dialogue or storyline." Each video had been sent directly to Parkhurst's address. Federal Judge Youlee Yim You. But it was a third "ping" against a sensitive database that appears to have kicked the investigation into urgent mode. Postal inspectors plugged away on the Parkhurst case all the way through to July 2016, when they realized that Parkhurst had ongoing contact with the boys in the images—he had another trip coming up. A law enforcement sensitive database revealed that Parkhurst had booked tickets for himself and one of the boys—a senior in high school living near Chicago—to Greece, Italy, and Sweden.

The trip would begin on August 3. On August 1, Postal Inspector O'Sullivan took a search warrant to Federal Judge Youlee Yim You in Portland, had it signed, and assembled her team.

They raided Parkhurst's home the next morning, one day before the trip. According to O'Sullivan, the search team found some of the prohibited images on "one or more" of Parkhurst's digital devices. Parkhurst then agreed to speak to investigators. He allegedly admitted that he had taken the photos, acknowledged masturbating to at least some of them, but denied that he engaged in sexual activity with the boys. Parkhurst also suggested that his collection of nude images would not "qualify as child pornography." (US child pornography law actually includes a clause banning "lascivious exhibition of the genitals or pubic area" as a way to short-circuit any "but I didn't actually touch them!" defense.) Parkhurst was arrested.

According to the Oregonian, he resigned from his job and surrendered his ministerial credentials a few days later. He was eventually transferred to Denver, where he will stand trial. He had his first court appearance there this week. Creative searching While the Internet has enabled an explosion in child pornography—an issue that was largely under control in the analog era, thanks to the difficulty and expense of finding, creating, printing, and distributing it—it at least makes investigations simpler, too. Even though law enforcement has access to expensive or secret databases, many of the Parkhurst investigation leads were based on EXIF data and publicly available Internet pages.

Google, Facebook, hotel review and naturist websites, online maps, and image searches—it's all grist for the mill. Once a hotel or cabin has been located, once a person has been ID'd on Facebook, once a trip is suspected, then it's time for the subpoena, the warrant, or the secret database. Still, with all of the tech, search, and monitoring tools available to authorities today, one of the most useful investigative skills remains the ability to use the public Internet creatively.

Fooling the ‘Smart City’

The concept of a smart city involves bringing together various modern technologies and solutions that can ensure comfortable and convenient provision of services to people, public safety, efficient consumption of resources, etc. However, something that often goes under the radar of enthusiasts championing the smart city concept is the security of smart city components themselves.

The truth is that a smart city’s infrastructure develops faster than security tools do, leaving ample room for the activities of both curious researchers and cybercriminals. Smart Terminals Have Their Weak Points Too Parking payment terminals, bicycle rental spots and mobile device recharge stations are abundant in the parks and streets of modern cities.

At airports and passenger stations, there are self-service ticket machines and information kiosks.
In movie theaters, there are ticket sale terminals.
In clinics and public offices, there are queue management terminals.

Even some paid public toilets now have payment terminals built into them, though not very often. Ticket terminals in a movie theater However, the more sophisticated the device, the higher the probability that it has vulnerabilities and/or configuration flaws.

The probability that smart city component devices will one day be targeted by cybercriminals is far from zero. Сybercriminals can potentially exploit these devices for their ulterior purposes, and the scenarios of such exploitation come from the characteristics of such devices. Many such devices are installed in public places They are available 24/7 They have the same configuration across devices of the same type They have a high user trust level They process user data, including personal and financial information They are connected to each other, and may have access to other local area networks They typically have an Internet connection Increasingly often, we see news on another electronic road sign getting hacked and displaying a “Zombies ahead” or similar message, or news about vulnerabilities detected in traffic light management or traffic control systems. However, this is just the tip of the iceberg; smart city infrastructure is not limited to traffic lights and road signs. We decided to analyze some smart city components: Touch-screen payment kiosks (tickets, parking etc.) Infotainment terminals in taxis Information terminals at airports and railway terminals Road infrastructure components: speed cameras, traffic routers Smart City Terminals From a technical standpoint, nearly all payment and service terminals – irrespective of their purpose – are ordinary PCs equipped with touch screens.

The main difference is that they have a ‘kiosk’ mode – an interactive graphical shell that blocks the user from accessing the regular operating system functions, leaving only a limited set of features that are needed to perform the terminal’s functions.

But this is theory.
In practice, as our field research has shown, most terminals do not have reliable protection preventing the user from exiting the kiosk mode and gaining access to the operating system’s functions. Exiting the kiosk mode Techniques for Exiting the Kiosk Mode There are several types of vulnerabilities that affect a large proportion of terminals.

As a consequence, there are existing attack methods that target them. The sequence of operations that can enable an attacker to exit the full-screen application is illustrated in the picture below. Methodology for analyzing the security of public terminals Tap Fuzzing The tap fuzzing technique involves trying to exit the full-screen application by taking advantage of incorrect handling when interacting with the full-screen application.

A hacker taps screen corners with his fingers and tries to call the context menu by long-pressing various elements of the screen.
If he is able to find such weak points, he tries to call one of the standard OS menus (printing, help, object properties, etc.) and gain access to the on-screen keyboard.
If successful, the hacker gets access to the command line, which enables him to do whatever he wants in the system – explore the terminal’s hard drive in search of valuable data, access the Internet or install unwanted applications, such as malware. Data Fuzzing Data fuzzing is a technique that, if exploited successfully, also gives an attacker access to the “hidden” standard OS elements, but by using a different technique.

To exit the full-screen application, the hacker tries filling in available data entry fields with various data in order to make the ‘kiosk’ work incorrectly.

This can work, for example, if the full-screen application’s developer did not configure the filter checking the data entered by the user properly (string length, use of special symbols, etc.).

As a result, the attacker can enter incorrect data, triggering an unhandled exception: as a result of the error, the OS will display a window notifying the user of the problem. Once an element of the operating system’s standard interface has been brought up, the attacker can access the control panel, e.g., via the help section.

The control panel will be the starting point for launching the virtual keyboard. Other Techniques Yet another technique for exiting the ‘kiosk’ is to search for external links that might enable the attacker to access a search engine site and then other sites.

Due to developer oversight, many full-screen applications used in terminals contain links to external resources or social networks, such as VKontakte, Facebook, Google+, etc. We have found external links in the interface of cinema ticket vending machines and bike rental terminals, described below. One more scenario of exiting the full-screen application is using standard elements of the operating system’s user interface. When using an available dialog window in a Windows-based terminal, an attacker is sometimes able to call the dialog window’s control elements, which enables him to exit the virtual ‘kiosk’. Exiting the full-screen application of a cinema ticket vending terminal Bike Rental Terminals Cities in some countries, including Norway, Russia and the United States, are dotted with bicycle rental terminals.
Such terminals have touch-screen displays that people can use to register if they want to rent a bike or get help information. Status bar containing a URL We found that the terminal system shown above has a curious feature.

The Maps section was implemented using Google maps, and the Google widget includes a status bar, which contains “Report an Error”, “Privacy Policy” and “Terms of Use” links, among other information.

Tapping on any of these links brings up a standard Internet Explorer window, which provides access to the operating system’s user interface. The application includes other links, as well: for example, when viewing some locations on the map, you can tap on the “More Info” button and open a web page in the browser. The Internet Explorer opens not only a web page, but also a new opportunity for the attacker It turned out that calling up the virtual keyboard is not difficult either.

By tapping on links on help pages, an attacker can access the Accessibility section, which is where the virtual keyboard can be found.

This configuration flaw enables attackers to execute applications not needed for the device’s operation. Running cmd.exe demonstrates yet another critical configuration flaw: the operating system’s current session is running with administrator privileges, which means that an attacker can easily execute any application. The current Windows session is running with administrator privileges In addition, an attacker can get the NTLM hash of the administrator password.
It is highly probable that the password used on this device will work for other devices of the same type, as well. Note that, in this case, an attacker can not only obtain the NTLM hash – which has to be brute-force cracked to get the password – but the administrator password itself, because passwords can be extracted from memory in plain text. An attacker can also make a dump of the application that collects information on people who wish to rent a bicycle, including their full names, email addresses and phone numbers.
It is not impossible that the database hosting this information is stored somewhere nearby.
Such a database would have an especially high market value, since it contains verified email addresses and phone numbers.
If it cannot be obtained, an attacker can install a keylogger that will intercept all data entered by users and send it to a remote server. Given that these devices work 24/7, they can be pooled together to mine cryptocurrency or used for hacking purposes seeing as an infected workstation will be online around the clock. Particularly audacious cybercriminals can implement an attack scenario that will enable them to get customer payment data by adding a payment card detail entry form to the main window of the bike rental application.
It is highly probable that users deceived by the cybercriminals will enter this information alongside their names, phone numbers and email addresses. Terminals at Government Offices Terminals at some government offices can also be easily compromised by attackers.

For example, we have found a terminal that prints payment slips based on the data entered by users.

After all fields have been filled with the relevant data, the user taps the “Create” button, after which the terminal opens a standard print window with all the print parameters and control tools for several seconds. Next, the “Print” button is automatically activated. A detail of the printing process on one of the terminals An attacker has several seconds to tap the Change [printer] button and exit into the help section.

From there, they can open the control panel and launch the on-screen keyboard.

As a result, the attacker gets all the devices needed to enter information (the keyboard and the mouse pointer) and can use the computer for their own mercenary purposes, e.g., launch malware, get information on printed files, obtain the device’s administrator password, etc. Public Devices at Airports Self-service check-in kiosks that can be found at every modern airport have more or less the same security problems as the terminals described above.
It is highly probable that they can be successfully attacked.

An important difference between these kiosks and other similar devices is that some terminals at airports handle much more valuable information that terminals elsewhere. Exiting the kiosk mode by opening an additional browser window Many airports have a network of computers that provide paid Internet access.

These computers handle the personal data that users have to enter to gain access, including people’s full names and payment card numbers.

These terminals also have a semblance of a kiosk mode, but, due to design faults, exiting this mode is possible. On the computers we have analyzed, the kiosk software uses the Flash Player to show advertising and at a certain point an attacker can bring up a context menu and use it to access other OS functions. It is worth noting that web address filtering policies are used on these computers. However, access to policy management on these computers was not restricted, enabling an attacker to add websites to the list or remove them from it, offering a range of possibilities for compromising these devices.

For example, the ability to access phishing pages or sites used to distribute malware potentially puts such computers at risk.

And blacklisting legitimate sites helps to increase the chances of a user following a phishing link. List of addresses blocked by policies We also discovered that configuration information used to connect to the database containing user data is stored openly in a text file.

This means that, after finding a way to exit kiosk mode on one of these machines, anyone can get access to administrator credentials and subsequently to the customer database – with all the logins, passwords, payment details, etc. A configuration file in which administrator logins and password hashes are stored Infotainment Terminals in Taxicabs In the past years, Android devices embedded in the back of the front passenger seat have been installed in many taxicabs. Passengers in the back seat can use these devices to watch advertising, weather information, news and jokes that are not really funny.

These terminals have cameras installed in them for security reasons. The application that delivers the content also works in kiosk mode and exiting this mode is also possible. Exiting the kiosk mode on a device installed in a taxi makes it possible to download external applications In those terminals that we were able to analyze, there was hidden text on the main screen.
It can be selected using standard Android tools using a context menu.

This leads to the search option being activated on the main screen.

As a result, the shell stops responding, terminates and the device is automatically restarted. While the device is starting, all the hacker needs to do is exit to the main menu at the right time and open the RootExplorer – an Android OS file manager. Android interface and folder structure This gives an attacker access to the terminal’s OS and all of its capabilities, including the camera.
If the hacker has prepared a malicious application for Android in advance and hosted it on a server, that application can be used to remotely access the camera.
In this case, the attacker can remotely control the camera, making videos or taking photos of what is going on in the taxi and uploading them to his server. Exiting the terminal’s full-screen application in a taxi gives access to the operating system’s functions Our Recommendations A successful attack can disrupt a terminal’s operation and cause direct financial damage to its owners.

Additionally, a hacker can use a compromised terminal to hack into others, since terminals often form a network.

After this, there are extensive possibilities for exploiting the network – from stealing personal data entered by users and spying on them (if the terminal has a camera or document scanner built into it) to stealing money (if the terminal accepts cash or bank cards). To prevent malicious activity on public devices that have a touch interface, the developers and administrators of terminals located in public places should keep the following recommendations in mind: The kiosk’s interactive shell should have no extra functions that enable the operating system’s menu to be called (such as right mouse click, links to external sites, etc.) The application itself should be launched using sandboxing technology, such as jailroot, sandbox, etc.

This will help to keep the application’s functionality limited to the artificial environment Using a thin client is another method of protection.
If a hacker manages to ‘kill’ an application, most of the valuable information will be stored on the server rather than the compromised device if the device is a thin client The current operating system session should be launched with the restricted privileges of a regular user – this will make installing new applications much more difficult A unique account with a unique password should be created on each device to prevent attackers who have compromised one of the terminals from using the password they have cracked to access other similar devices Elements of the Road Infrastructure The road infrastructure of modern cities is being gradually equipped with a variety of intelligent sensors, regulators, traffic analyzers, etc.

All these sensors collect and send traffic density information to data centers. We looked at speedcams, which can be found everywhere these days. Speed Cameras We found speedcam IP addresses by pure chance, using the Shodan search engine.

After studying several of these cameras, we developed a dork (a specific search request that identifies the devices or sites with pinpoint accuracy based on a specific attribute) to find as many IP addressed of these cameras as possible. We noticed a certain regularity in the IP addresses of these devices: in each city, all the cameras were on the same subnet.

This enabled us to find those devices which were not shown in Shodan search results but which were on the same subnets with other cameras.

This means there is a specific architecture on which these devices are based and there must be many such networks. Next, we scanned these and adjacent subnets on certain open ports and found a large number of such devices. After determining which ports are open on speed cameras, we checked the hypothesis that one of them is responsible for RTSP – the real-time streaming protocol.

The protocol’s architecture enables streaming to be either private (accessible with a login and password) or public. We decided to check that passwords were being used.
Imagine our surprise when we realized there was no password and the entire video stream was available to all Internet users. Openly broadcast data includes not only the video stream itself, but additional data, such as the geographical coordinates of cameras, as well. Direct broadcast screenshot from a speed camera We found many more open ports on these devices, which can also be used to get many interesting technical details, such as a list of internal subnets used by the camera system or the list of camera hardware. We learned from the technical documentation that the cameras can be reprogrammed over a wireless channel. We also learned from documentation that cameras can detect rule violations on specified lanes, making it possible to disable detection on one of the lanes in the right place at the right time.

All of this can be done remotely. Let’s put ourselves in criminals’ shoes and assume they need to remain undetected in the car traffic after performing certain illegal actions.

They can take advantage of speed camera systems to achieve this.

They can disable vehicle detection on some or all lanes along their route or monitor the actions of law-enforcement agents chasing them. In addition, a criminal can get access to a database of vehicles registered as stolen and can add vehicles to it or remove them from it. We have notified the organizations responsible for operating speed cameras in those countries where we identified the above security issues. Routers We also analyzed another element of the road infrastructure – the routers that transfer information between the various smart city elements that are part of the road infrastructure or to data centers. As we were able to find out, a significant part of these routers uses either weak password protection or none at all.

Another widespread vulnerability is that the network name of most routers corresponds to their geographic location, i.e., the street names and building numbers.

After getting access to the administration interface of one of these routers, an attacker can scan internal IP ranges to determine other routers’ addresses, thereby collecting information on their locations.

After this, by analyzing road load sensors, traffic density information can be collected from these sensors. Such routers support recording traffic and uploading it to an FTP server that can be created by an attacker.

These routers can also be used to create SSH tunnels.

They provide access to their firmware (by creating its backup copy), support Telnet connections and have many other capabilities. These devices are indispensable for the infrastructure of a smart city. However, after gaining access to them, criminals can use them for their own purposes.

For example, if a bank uses a secret route to move large amounts of cash, the route can be determined by monitoring information from all sensors (using previously gained access to routers). Next, the movements of the vehicles can be monitored using the cameras. Our Recommendations To protect speed cameras, a full-scale security audit and penetration testing must first be carried out.

From this, well-thought-out IT security recommendations be prepared for those who provide installation and maintenance of such speed monitoring systems.

The technical documentation that we were able to obtain does not include any information on security mechanisms that can protect cameras against external attacks.

Another thing that needs to be checked is whether such cameras are assigned an external IP address.

This should be avoided where possible.

For security reasons, none of these cameras should be visible from the Internet. The main issue with routers used in the road infrastructure is that there is no requirement to set up a password during initial loading and configuration of the device. Many administrators of such routers are too forgetful or lazy to do such simple things.

As a result, gaining access to the network’s internal traffic is sufficiently easy. Conclusion The number of new devices used in the infrastructure of a modern city is gradually growing.

These new devices in turn connect to other devices and systems.

For this environment to be safe for people who live in it, smart cities should be treated as information systems whose protection requires a custom approach and expertise. This article was prepared as part of the support provided by Kaspersky Lab to “Securing Smart Cities”, an international non-profit initiative created to unite experts in smart city IT security technologies.

For further information about the initiative, please visit securingsmartcities.org
I spend a lot of time working on enterprise Public Key Infrastructure (PKI), especially in light of the coming SHA-1 deprecation deadlines.
It’s nearly all I do these days. One question my customers ask all the time is how to provision certificates on non-Windows devices and computers. Microsoft does an excellent job of automating the process to install certificates on Windows computers (that is, automatic enrollment and renewal) using built-in mechanisms.
It makes for low-touch distribution and updating of certificates on Windows computers. But if you want to enroll for, distribute, or renew digital certificates on non-Windows platforms, it can be hit or miss. Non-Windows devices typically come with built-in digital certificate handling, but usually lack automatic requesting, distribution, installation, and renewal. Microsoft recommends two products: Intune and Microsoft System Center Configuration Manager (SCCM).

Both work well, but many customers who simply want digital certificate handling prefer a more lightweight and focused option.

The same goes for non-Microsoft MDM products, such as AirWatch. Today, Venafi is the leading solution for total digital certificate control in the enterprise.
It’s an awesome, comprehensive certificate management solution, but you’ll pay top dollar for it and implementation can easily take many months.

There are other, less costly certificate management solutions, but most fail to handle non-Windows devices well. Introducing CertAccord That’s why I got excited when longtime friend and consultant, Mark Cooper of PKI Solutions, told me about a new product in open beta called CertAccord Enterprise, created by him and his brother. CertAccord works with Linux computers; Mac and Unix support are coming soon. You install a lightweight client, which can handle certificate requests automatically or allow admins to request and renew manually.

The clients connect to a server containing the certificate authority bridge (CAB). The CAB acts as the intermediate registration authority and interfaces with the PKI’s issuing certification authority (CA), which right now must be Microsoft Active Directory Certificate Services.

The CAB links to a MySQL database, and both run on a Windows server.

The CAB and MySQL database can be installed on the same server or located on separate servers.

Admins connect to a web-based management console to define one or more certificate policies.

The certificate policies define which devices and certificate actions are allowed. The CertAccord management console allows you to define which CAs the product works with and to register or confirm participating devices. The biggest selling points of this product, besides adding Linux to PKI integration activities, are its quick installation and lightweight client.

Clients connect using the REST API to the CAB server.

Certificates are delivered as standard Linux certificate PEM files or as Java Key Store files. The client agent is a daemon or service process that starts automatically at system boot.
It's responsible for checking in with a CAB server for updated certificate policies and configuration information.
It's also responsible for checking and performing automatic renewals of certificates. A manual request can be generated using a one-line command, such as: cmbagent cert create purpose=webserver Whether the request is automated or requested manually, the agent automates the generation of a local private key using policy data obtained from the CAB.

Behind the scenes, it generates a text-based certificate request, signs it, and sends it to the CAB, which then sends the request to the issuing CA.

After the certificate is approved and/or created, it's delivered back to the CAB.

The client picks up the resulting certificate on its next check-in and installs it to the client’s local file system. Depending on the involved PKI-consuming application, the certificate may still need to be configured within the application.
In my experience, many applications will use any valid certificate matching the appropriate usage requirements, but nearly as many require manual configuration.
In many cases, even if manual application configuration is needed, it can be scripted. CertAccord essentially gives non-Windows computers the automated enrollment and renewal services that Windows computers have long enjoyed.

CertAccord is fairly new, but if you need its specific functionality, it’s easy to get up and running to test or deploy. Remember: The deprecation deadline for SHA-1 (Jan. 1, 2017) is coming soon! CertAccord is a great way to get your non-Windows computers updated to SHA-2 with minimal hassle.