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SHA-2: A family of two similar hash functions, with different block sizes, known as SHA-256 and SHA-512. They differ in the word size; SHA-256 uses 32-bit words where SHA-512 uses 64-bit words. There are also truncated versions of each standard, known as SHA-224, SHA-384, SHA-512/224 and SHA-512/256. These were also designed by the NSA.
SHA-2 (Secure Hash Algorithm 2) is a set of cryptographic hash functions designed by the United States National Security Agency (NSA) and first published in 2001. [ 3 ] [ 4 ] They are built using the Merkle–Damgård construction , from a one-way compression function itself built using the Davies–Meyer structure from a specialized block cipher.
IPsec Virtual Private Network and more; IEEE P1363 covers most aspects of public-key cryptography; Transport Layer Security (formerly SSL); SSH secure Telnet and more; Content Scrambling System (CSS, the DVD encryption standard, broken by DeCSS)
SHA-2 with 384 bits, Diffie–Hellman key exchange with a minimum 3072-bit modulus, and; RSA with a minimum modulus size of 3072. [2] The CNSA transition is notable for moving RSA from a temporary legacy status, as it appeared in Suite B, to supported status. It also did not include the Digital Signature Algorithm. This, and the overall ...
In the original DSS, was always SHA-1, but the stronger SHA-2 hash functions are approved for use in the current DSS. [3] [14] If | | is greater than the modulus length , only the leftmost bits of the hash output are used. Choose a key length .
SHA-2 (Secure Hash Algorithm 2) is a set of cryptographic hash functions designed by the United States National Security Agency (NSA), first published in 2001. They are built using the Merkle–Damgård structure, from a one-way compression function itself built using the Davies–Meyer structure from a (classified) specialized block cipher.
Requires SHA-2 compatible OS [2] Needs ECC compatible OS [3] Not affected [10] Vulnerable (HTTPS) Vulnerable Vulnerable Vulnerable (except Windows) Vulnerable Yes [n 10] 10–20 No [11] Yes Yes No No No Yes (only desktop) Requires SHA-2 compatible OS [2] Needs ECC compatible OS [3] Not affected Vulnerable (HTTPS/SPDY) Vulnerable Vulnerable ...
[12] [10] [13] NIST formally deprecated use of SHA-1 in 2011 and disallowed its use for digital signatures in 2013, and declared that it should be phased out by 2030. [14] As of 2020, chosen-prefix attacks against SHA-1 are practical. [6] [8] As such, it is recommended to remove SHA-1 from products as soon as possible and instead use SHA-2 or ...