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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:
SHA-1 produces a message digest based on principles similar to those used by Ronald L. Rivest of MIT in the design of the MD2, MD4 and MD5 message digest algorithms, but generates a larger hash value (160 bits vs. 128 bits).
Intel SHA Extensions are a set of extensions to the x86 instruction set architecture which support hardware acceleration of Secure Hash Algorithm (SHA) family. It was specified in 2013. [1]
(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.
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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The ".sha1" file extension indicates a checksum file containing 160-bit SHA-1 hashes in sha1sum format. The ".md5" file extension, or a file named "MD5SUMS", indicates a checksum file containing 128-bit MD5 hashes in md5sum format. The ".sfv" file extension indicates a checksum file containing 32-bit CRC32 checksums in simple file verification ...