![]() Plnd Plain data, stands for unencrypted, gzip compressed data, see below. Pswd Password, stands for encrypted data using a password. PhskPublic key hash and symmetric key, stands for encryption with public/private asymmetric keys and symmetric key. Pkhs Public key hash, stands for encrypted data using a cryptographic identity, identified by a 20 bytes hash of the encrypting public key. seb file length is n+1 bytes, the lower line shows the byte numbers (ranging from 0 to n). seb files, means prefixes and the XML settings data (keys and values) are coded in Unicode UTF8. seb file always begins with a 4 char prefix, which specifies the kind of the following data. By using a gzip wrapper around the binary encrypted configuration data, most browsers will download the. seb file with the standard MIME type html/text. Because a web server usually won’t know the. seb file is encrypted and in a binary format). seb file instead of displaying it as text in the browser (which would lead to arbitrary characters, as the. This helps some web browsers to recognize that they should download a. seb file is actually a gzip compressed archive, but with the file extension. Instead, each institution using SEB can generate their own certificates/keys and replace them whenever they like.Įncryption with certificate/key can be combined with password encryption, for example for additional security for particular exams.Ī. On centrally managed computers where users/examines don’t have administrator access, the secret (key) is separated quite well from the cipher text.Īt the same time this method doesn’t use a general key, which would be stored inside the SEB application code and therefore could be extracted, made public and would affect the whole installed base of SEB worldwide. seb files a cryptographic key (combined with a X.509 certificate) is used, which will be deployed to the exam client computers before the exams and stored securely in the Windows Certificate Store or the OS X Keychain. Therefore this method is ideal on not centrally managed student computers. 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. seb file, the password used to encrypt this file needs to be entered. There are two encryption/decryption methods: For example there can be a general meta key for enabling/disabling a specific functionality and individual detail keys per platform for the specific configuration details. If this isn’t possible because of the nature of a settings option (for example if that feature isn’t available on some platform or doesn’t make sense there) a compatible way of configuring clients must be found. As many key/value pairs as possible should have the same function on all platforms. seb files platform-independently for configuring all versions of SEB clients. Key names should be self-explaining (avoid abbreviations, key name string length is irrelevant). The settings itself are defined as a XML structure with key/value pairs. We prioritize an encryption which is as secure as possible, following current cryptography standards. It has to be possible to implement the encryption on various platforms, as clients running on Windows, Mac OS X and in future iOS, Linux-, Android and a SEB server application should be able to open and save.
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