This hashing algorithm was developed as a successor to SHA-1 by the National Institute of Standards and Technology (NIST) and the National Security Agency (NSA). For new code, we recommend the SHA-2 family of hashes. SHA-1 is known to have weaknesses, and should only be used where required for compatibility purposes. This algorithm generates a 160-bit hash value.
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This algorithm was developed for use with DSA (Digital Signature Algorithm) or DSS (Digital Signature Standard). This hashing algorithm was developed by the National Institute of Standards and Technology (NIST) and by the National Security Agency (NSA). To see which Microsoft providers support MAC, see Microsoft Cryptographic Service Providers. These algorithms are sometimes called keyed-hash algorithms. The recomputed hash value is used to verify that the base data was not changed. The original session key is required to recompute the hash value.
#CHIPTUNE GENERATOR ALGORITHM MAC#
MAC algorithms are similar to hash algorithms, but are computed by using a symmetric (session) key. These algorithms are well known and can be reviewed in detail in any reference on cryptography. All three are known to have weaknesses and should only be used where needed for compatibility purposes. These algorithms were developed in sequential order. These hashing algorithms were all developed by RSA Data Security, Inc. It can be used with any iterated cryptographic hash algorithm, such as MD5 or SHA-1. This algorithm also uses a symmetric key to create the hash, but is more complex than the simple Cipher Block Chaining (CBC) MAC algorithm. The encryption algorithm used to build the MAC is the one that was specified when the session key was created.Īn algorithm (CALG_HMAC) implemented by Microsoft providers. This method encrypts the base data with a block cipher and then uses the last encrypted block as the hash value.
#CHIPTUNE GENERATOR ALGORITHM CODE#
One of the algorithms (CALG_MAC) implemented by Microsoft providers is a block cipher Message Authentication Code (MAC). For a list of additional sources, refer to Additional Documentation on Cryptography. Internal details of these algorithms are beyond the scope of this documentation. Each of these algorithms is supported in the Microsoft Base, Strong, and Enhanced Cryptographic Providers. The following algorithms compute hashes and digital signatures.