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VulcanSphere (talk | contribs) Adding local short description: "Block cipher", overriding Wikidata description "Encryption software" (Shortdesc helper) |
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'''Chiasmus''' is a secret German government [[block cipher]] that was leaked by reverse engineering. It became notorious for its dilettant use in the [[Federal Office for Information Security|BSI]]'s software GSTOOL, which used it in insecure [[Block cipher mode of operation#ECB|Electronic Codebook (ECB)]] mode and generated the key with a pseudo random number generator initialized to the current system time, which means an effective key length that can easily be broken by brute force. The BSI tried to prevent the publication of these findings with legal threats.
Chiasmus seems to be resistant against the most common cryptographic attacks (linear and differential cryptanalysis), but a lot slower than the openly available state of the art ciphers such as AES.
== See also ==
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