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The Secure Hash Algorithms are a family of cryptographic hash functions published by the National Institute of Standards and Technology (NIST) as a U.S. Federal Information Processing Standard (FIPS), including:
All major web browser vendors ceased acceptance of SHA-1 SSL certificates in 2017. [15] [9] [4] In February 2017, CWI Amsterdam and Google announced they had performed a collision attack against SHA-1, publishing two dissimilar PDF files which produced the same SHA-1 hash. [16] [2] However, SHA-1 is still secure for HMAC. [17]
(companion web site contains online cryptography course that covers hash functions) "The ECRYPT Hash Function Website". Buldas, A. (2011). "Series of mini-lectures about cryptographic hash functions". Archived from the original on 2012-12-06. Open source python based application with GUI used to verify downloads.
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sha1sum is a computer program that calculates and verifies SHA-1 hashes.It is commonly used to verify the integrity of files. It (or a variant) is installed by default on most Linux distributions.
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DK = PBKDF2(HMAC-SHA1, passphrase, ssid, 4096, 256) PBKDF1 had a simpler process: the initial U (called T in this version) is created by PRF(Password + Salt), and the following ones are simply PRF(U previous). The key is extracted as the first dkLen bits of the final hash, which is why there is a size limit. [9]
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