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Which protocol does hashing and authentication?
The design of SHA is similar to the MD5 family of hash functions. For more information on SHA, see RFC 3174 at http://www.ietf.org/rfc/rfc3174.txt. For the System Management Agent, the default authentication protocol is HMAC-MD5–96.
How a secure hash function can be used to authenticate a message?
The one-way function, Hash-Based Message Authentication Code with Secure Hashing Algorithm 1 (HMAC-SHA1), is run over the header and payload with a secret key. The sender writes the HMAC-SHA1 hash into the authentication tag, and the receiver runs the same computation and checks its result against the tag.
What is difference between a message authentication code and a one-way hash function?
7 Answers. The main difference is conceptual: while hashes are used to guarantee the integrity of data, a MAC guarantees integrity AND authentication.
What is authentication, hash functions, digital signatures?
Authentication, Hash Functions, Digital Signatures Message Authentication message authentication is concerned with: protecting the integrity of a message validating identity of originator non-repudiation of origin (dispute resolution) electronic equivalent of a signature on a message
How is a message authentication code ( MAC ) generated?
an authenticator, signature, or message authentication code (MAC) is sent along with the message the MAC is generated via some algorithm which depends on both the message and some (public or private) key known only to the sender and receiver.
When to use private key cipher for authentication?
Authentication using Private-key Ciphers if a message is being encrypted using a session key known only to the sender and receiver, then the message may also be authenticated since only sender or receiver could have created it any interference will corrupt the message (provided it includes sufficient redundancy to detect change)
Which is variable length one way hash function?
HAVAL a variable length one-way hash function designed by Uni of Wollongong and recently published at Auscrypt’92 it processes messages in 1024-bit blocks, using an 8-word buffer and 3 to 5 rounds of 16 steps each, creating hash values of 128, 160, 192, 224, or 256 bits in length