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History of cryptography and cryptanalysis. Questions that wish to ask about the history of cryptography should use this tag; if you're asking about historical ciphers you may also wish to use the clas…
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The International Data Encryption Algorithm (IDEA) is a block cipher developed in 1991 by James Massey and Xuejia Lai.
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Copy protection or content protection covers various mechanism, such as DRM and software license keys, used to restrict the unauthorized copying or use of software or digital media.
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a form of cryptanalysis which studies cryptographic algorithms by observing how differences in input affect differences on output.
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a cryptographic hash function standardized by NIST as a new alternative to the SHA-2 hash function family.
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material that can be referenced for further information on cryptography.
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part of the SHA-2 family of hash functions with a 512 bit output.
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a cryptographic hash function. It was designed for the SHA-3 competition where it became a finalist, but wasn't chosen as SHA-3.
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