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One Time Passwords (OTP) are often used in two-factor authentication systems, where a user must enter the value. One method is HOTP (-based OTP) uses a Hash-based Message Authentication Code (). The seed of HOTP is generated by a random key:

Posted 12 months ago (17 May 2023)

H is a message authentication code () that can be used to verify the integrity and authentication of a message. It involves hashing the message with a secret key and thus differs from standard hashing, which is purely a one-way function.

Posted 1 year ago (26 January 2023)

Could the future security of the Internet depend on just one method ... LWE (Learning With Errors - lattice cryptography) , or should we find an alternative, such as isogenies, code- methods and hash- signatures?

Posted 1 year ago (09 January 2023)

With a keyed-cryptography hash, we use a secret key to generate the hash of a message. This can produce a MAC (Message Authentication Code). One of the fastest keyed-hashing methods around is SipHash - created by JP Aumasson and Daniel J. Bernstein ()

Posted 2 years ago (12 June 2022)