A. blind signature algorithm

B. Proxy signature algorithm

C.RSA algorithm

D. group signature algorithm

Answer: c

Extension:

Digital signature algorithm is a subset of digital signature standard, which represents a specific public key algorithm dedicated to digital signature. The key runs on the message hash generated by SHA- 1: to verify the signature, the message hash is recalculated, the signature is decrypted with the public key and the results are compared. The abbreviation is DSA.

Digital signature is a special form of electronic signature. So far, at least more than 20 countries have passed laws recognizing electronic signatures, including the European Union and the United States. On August 28th, 2004, the 11th meeting of the 10th the NPC Standing Committee passed the Electronic Signature Law.

In the ISO 7498-2 standard, digital signature is defined as "some data attached to a data unit, or the cryptographic transformation of the data unit, which allows the receiver of the data unit to confirm the source and integrity of the data unit and protect the data from being forged by people (such as the receiver)".

Digital signature mechanism provides an authentication method to solve the problems of forgery, denial, counterfeiting and tampering. By using data encryption technology and data conversion technology, both the sender and the receiver can meet two conditions: the receiver can authenticate the identity claimed by the sender; The sender cannot deny the fact that it will send data in the future.