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In the ElGamal digital signature scheme, if the random number K is leaked, what is the relationship with the digital signature scheme?
Encryption method.

The encryption method has a novel feature, that is, the public disclosure of the encryption key will not reveal the corresponding decryption key. This has two important consequences: 1, and the public key can be made public without transmission of the key.

2. You can "sign" the message with a private decryption key. Anyone can use the corresponding publicly disclosed encryption key to verify this signature.