Digital signature (also known as public key digital signature) is a digital string that can only be generated by the sender of information, and others cannot forge it. This number string is also an effective proof of the authenticity of the information sent by the information sender.

It is a method to authenticate digital information, which is similar to the ordinary physical signature written on paper, but it is realized by using the technology in the field of public key encryption. A set of digital signatures usually defines two complementary operations, one for signing and the other for verification. Digital signature is the application of asymmetric key encryption technology and digital digest technology.

Extended data:

strong function

Network security, mainly network information security, needs to take corresponding security technical measures and provide appropriate security services. As one of the means to ensure the security of network information, digital signature mechanism can solve the problems of forgery, denial, counterfeiting and tampering. One of the purposes of digital signature is to replace the traditional manual signature and seal under the network environment, which plays an important role:

1, anti-counterfeiting. Only the signer knows the private key, so it is impossible for others to construct it correctly.

2, can identify the identity. Because the traditional manual signature is usually a direct meeting between the two parties, the identity can be clear. In the network environment, the receiver must be able to identify the identity claimed by the sender.