The digital signature of the company that issued the digital certificate. In the digital signature, what should be used to sign the information summary?
Digital signature is used to ensure the integrity, authenticity and non-repudiation of data. Message digest is the result of calculating the original data according to a certain algorithm, which mainly detects whether the original data has been modified. Message digest is different from encryption. Encryption transforms the original data, and the original data can be obtained from the transformed data, while the message digest obtains a part of information from the original data, which is much less than the original data, so the message digest can be regarded as the fingerprint of the original data. Jing 'an answers for you.