Problems that digital signature can solve:

1, undeniable.

Just like endorsement, signature, stamp and thumbprint in the traditional sense, the message sender or account transferor uses the private key to encrypt the message, which means that the message is said from here, which is undeniable.

2. Certification.

The receiver can use the public key broadcast by the sender to verify whether the message is published by another party.

3, tamper-proof.

The receiver can't modify the content of the received message, which can prevent civet cats from becoming princes.

Digital signature does not depend on the problem that trusted institutions can't solve: double payment. /p/84df6a96f 12 1