`20170`

- HMAC-SHA1
is not broken yet, but there are much stronger alternatives . - DES-MAC
provides 56 bits of security, which is no longer considered secure . - Triple-DES-MAC
provides 112 bits of security, which is now deprecated .

algId identifies the algorithm used to compute the MAC value. All implementationsMUST support id-PasswordBasedMAC. The details on this algorithm are presented in section.

algId identifies the algorithm used to compute the MAC value. All implementationsMUST support id-PasswordBasedMAC as presented in. Implementations MAY also support PBMAC1 as presented in.

This MAC algorithm was designed to take a shared secret (a password) and use it to compute a check value over a piece of information. The assumption is that, without the password, the correct check value cannot be computed. The algorithm computes the one-way function multiple times in order to slow down any dictionary attacks against the password value.

This MAC algorithm was designed to take a shared secret (a password) and use it to compute a check value over a piece of information. The assumption is that, without the password, the correct check value cannot be computed. The algorithm computes the one-way function multiple times in order to slow down any dictionary attacks against the password value. The password used to compute this MACSHOULD NOT be used for any other purpose.

owf identifies the algorithm and associated parameters used to compute the key used in the MAC process. All implementationsMUST support SHA-1.

owf identifies the algorithm and associated parameters used to compute the key used in the MAC process. All implementationsMUST support SHA-256.

iterationCount identifies the number of times the hash is applied during the key computation process. The iterationCountMUST be a minimum of 100. Many people suggest using values as high as 1000 iterations as the minimum value. The trade off here is between protection of the password from attacks and the time spent by the server processing all of the different iterations in deriving passwords. Hashing is generally considered a cheap operation but this may not be true with all hash functions in the future.

iterationCount identifies the number of times the hash is applied during the key computation process. The iterationCountMUST be a minimum of 100; however, the iterationCountSHOULD be as large as server performance will allow, typically at least 10,000. There is a trade-off between protection of the password from attacks and the time spent by the server processing the iterations. As part of that trade-off, an iteration count smaller than 10,000 can be used when automated generation produces shared secrets with high entropy.

mac identifies the algorithm and associated parameters of the MAC function to be used. All implementationsMUST support HMAC-SHA1. All implementations SHOULD support DES-MAC and Triple-DES-MAC.

mac identifies the algorithm and associated parameters of the MAC function to be used. All implementationsMUST support HMAC-SHA256. All implementations SHOULD support AES-GMACwith a 128-bit key.