Integrity.

Digital signature technology encrypts the summary information with the sender's private key and transmits it to the recipient together with the original text. The receiver can only use the sent public key to decrypt the encrypted summary information, and then use the hash function 0) to generate a summary information for the received original text, and compare it with the decrypted summary information. If they are the same, it means that the received information is complete and has not been modified during the transmission process. Otherwise, it means that the information has been modified, so the digital signature can verify the integrity of the information.

An important feature of a digital signature is that it can confirm the identity of the sender of the information and the reliability and integrity of the electronic file. It is unique and verifiable for both the sender and the information being sent. And undeniable authority, another important feature is that it exchanges digital certificates between computers to help confirm that the parties are who they claim to be.