The Config Key can be generated automatically by a compatible exam system together with the SEB config to be used for an exam.
This can be used to keep users logged in SEB started with client settings after an exam session was started. Now TLS 1. Added more default prohibited processes.
Private clipboard should now also work correctly with rich-text editors like TinyMCE fixed double pasting of text. Additional bugfixes. See release notes for all changes. Other features: Using the powerful feature "Additional Resources", external and embedded webpages, full or partial websites, HTML5 web applications and PDF documents can be accessed securely and easily in exams using icons in the SEB task bar similar to permitted applications or hierarchical popup menus.
Support for encrypted. Use the separate SEB Windows configuration tool to create. Buttons in the SEB task bar for back to start, reload page, change keyboard layout, switch Wi-Fi network, change audio volume and a display for the current time improve usability in exams. Feature to quit SEB after the exam is submitted by specifying a quit link and placing this on the summary page displayed by your LMS after submitting the exam. Configurable options per exam in the user interface: Size and positioning of browser windows main window with the quiz and additional browser windows can be preset.
The SEB main browser window can be displayed full screen or as a sizable and movable window. Permitted third party applications are easy to start and to switch to autostart together with SEB and by clicking on its icon in the SEB task bar. Prohibited processes and applications can be defined which are closed when SEB starts up. SEB contains a list of default prohibited processes too.
PrintScreen can be blocked, the clipboard is cleared when SEB is started and stopped. Security feature which monitors processes and hinders all non-permitted applications to open, become active and display windows while SEB is running. Individual proxy settings, URL filters and server certificates can be used per exam. SEB config files saved for configuring a client can contain embedded cryptographic identities X. Screen saver and idle sleep are paused while SEB is running to prevent having to enter an screen unlock password before the exam starts.
Can save. Configuration files can configure a SEB exam client to show for example a portal page with the current exams. Configuration files can be used to start an exam with individual configuration like specific security and user interface options, permitted third party applications and additional resources, Browser Exam Key for authenticating these settings and the SEB application to an exam server, Quit Link to close SEB automatically when an exam is submitted etc.
For debugging purposes. Support for the modern WebKit browser engine WKWebView , which increases performance, stability and compatibility with web applications. You can use web-based video conferencing and remote proctoring solutions, as long as the requirements explained in release notes are met, so that SEB can use the modern WebView.
We recommend to only use macOS versions which still receive security updates from Apple the three most recent, currently macOS This caused pages with yet unknown domains to not load. New in SEB 3. With the SEB integration in Moodle 3. Live remote proctoring using the free, open source video conferencing solution Jitsi Meet. AI machine learning supported proctoring detects if candidates disappear from the camera view or if other faces show up.
Also suspicious face movements are detected and displayed with warning symbols in the video stream. The author also provides good documentation about properly encrypting with AES and explains, why this effort is necessary. The description below explains generally how the encryption and decryption is done by RNCryptor, which is roughly the procedure that should be used for any secure use of AES it is not specific to RNCryptor. The OS X version uses the open source C crypto framework CommonCrypto , which could also be used on Linux, although many other open and closed source frameworks also provide these crypto algorithms.
Taken from Wikipedia , see the links for the full description. AES Advanced Encryption Standard, specification for the encryption of electronic data using a symmetric-key algorithm. See also list of implementations. HMAC A hash-based message authentication code is a specific construction for calculating a message authentication code MAC involving a cryptographic hash function in combination with a secret cryptographic key.
As with any MAC, it may be used to simultaneously verify both the data integrity and the authenticity of a message. IV Initialization vector, an additional random or pseudorandom input value, which is required to be mixed with the first block when using a block-based encryption algorithm like AES-CBC. PBKDF2 applies a pseudorandom function , such as a cryptographic hash , cipher , or HMAC to the input password or passphrase along with a salt value and repeats the process many times to produce a derived key , which then can be used as a cryptographic key in subsequent operations.
PRF Pseudo random function. The plain settings are saved as serialized objects in a XML format. Therefore there are no sections as in the old ini files. All keys in the root-level dictionary are unique each key can only occur once. Toggle navigation Safe Exam Browser. Developer Documentation File Format. This method separates encrypted data cypher text and key secret very well, as long as the exam administrator chooses a good password and it is kept secret just before the exam starts.
Therefore this method is ideal on not centrally managed student computers. For encrypting. Basic file structure with 4 char prefix A. Procedure to encrypt and save a. If none is selected, then it aborts saving the. If a cryptographic identity is selected, encrypt the whole resulting data from step 2 or 3 including the prefix! Compress with gzip and save the resulting binary data in the. Procedure to load and decrypt a. Decompress with gzip ungzip. Check for the first four bytes prefix.
The private key belonging to this identity is retrieved and used to decrypt the encrypted data. Check for the prefix of the data resulting from step 2 or 3. Decrypt the data with this password. If decryption was successful, decompress with gzip ungzip.
The resulting data is the XML settings data. Encrypt the SEB config data with the generated symmetric key. The binary key is converted to a base64 encoded string, which is used as the encryption password for the settings data. Encrypt the symmetric key with the given public key Put the data together prefix, public key hash, encrypted symmetric key with preceding 32 bit integer value containing the length of the encrypted key, encrypted settings data , gzip compress resulting binary data.
Decrypt: 3. Decompress data, parse prefix and other components 3. Use public key hash to find matching private key from certificate store 3.
Decrypt symmetric key using the private key 3. Use base64 encoded string representation of the decrypted symmetric key to decrypt the SEB config data. Encrypting The exam administrator can choose the identity for encryption from a list of cryptographic identities. These have to meet the following conditions: They need to be complete identities; means there must be a certificate with embedded public key and an associated private key.
Fetch certificate and its public key from the identity selected for encryption.
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