sha1 top-level constant

SHA-1 produces a message digest based on principle similar to MD5, except it can generate a 160-bit hash. Since 2005, SHA-1 has not been considered secure and NIST formally deprecated it in 2001. It is no longer allowed in digital signatures, however it is safe to use it as a checksum to verify data integrity.

WARNING: It should not be used for cryptographic purposes.

Implementation

const BlockHashBase sha1 = _SHA1();