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The Digital Signature Algorithm (DSA) is a public-key cryptosystem and Federal Information Processing Standard for digital signatures, based on the mathematical concept of modular exponentiation and the discrete logarithm problem.
Extremely long signatures with a lot of HTML/wiki markup make page editing and discussion more difficult for the following reasons: Signatures that take up more than two or three lines in the edit window clutter the page and make it harder to distinguish posts from signatures. Long signatures give undue prominence to a given user's contribution.
Signatures produced by the BLS signature scheme are often referred to as short signatures, BLS short signatures, or simply BLS signatures. [2] The signature scheme is provably secure (the scheme is existentially unforgeable under adaptive chosen-message attacks ) in the random oracle model assuming the intractability of the computational Diffie ...
To ensure that is unique for each message, one may bypass random number generation completely and generate deterministic signatures by deriving from both the message and the private key. [ 5 ] Signature verification algorithm
The global private key is generally handled using a pseudo-random number generator. It is then sufficient to store a seed value. One-time secret keys are derived successively from the seed value using the generator. With this approach, the global private key is also very small, e.g. typically 32 bytes.
Both when encrypting messages and when verifying signatures, it is critical that the public key used to send messages to someone or some entity actually does 'belong' to the intended recipient. Simply downloading a public key from somewhere is not a reliable assurance of that association; deliberate (or accidental) impersonation is possible.