Skein is a cryptographic hash function and an entrant in the National Institute of Standards and Technology (NIST) hash function competition to design what will become the new Secure Hash Algorithm (SHA-3) standard.

* Secure Hash Algorithm 1, aka "SHA-1," tinyurl.com/dmsxah

This has been the most widely used secure hash algorithm particularly in Internet-standard message authentication.

* MD2, MD5 -"Message Digest"- (Wang & Yu, 2005), created by Ronald Rivest and SHA -"Secure Hash Algorithm"-, created by the USA Standards Institute for digital signature (NIST, 2002), all used for digest's extraction;

Digital signatures typically range from 128 bits using the MD5 algorithm to 160 bits in size using the more secure SHA1 (Secure Hash Algorithm 1).

Specific functions include the Data Encryption Standard (DES) for encryption and decryption, secure key storage and Secure Hash Algorithm (SHA) acceleration.

Other cryptographic algorithms currently validated by the CMVP are the Data Encryption Standard (DES), the Triple Data Encryption Standard (TDES), the Digital Signature Algorithm (DSA), the Secure Hash Algorithm (SHA-1), and the Random Number Generator algorithm (RNG).

FolderMatch lets you compare files five different ways, from the basic comparison of file size and date/time, to the advanced 160-bit Secure Hash Algorithm (SHA) method.

SHA (Secure Hash Algorithm) All algorithm used to create a checksum or one-way hash of a plaintext; the encrypted hash is then used as a digital signature.

That string is then mathematically manipulated according to a scheme known as the National Institute of Standards and Technology's Secure Hash Algorithm, which compresses and scrambles the 921,600 bytes of the original image into a 140-byte packet of digits.