Everyone must be familiar with public keys and private keys, so I won't go into details here.
Next, we mainly sort out the relationship between "digital signature" and "digital certificate":
To sum up, a digital certificate is a public key certified by CA, while a private key is generally generated locally by the certificate holder and kept by the certificate holder himself.
1, digital signature
? (hash) (private key)
Information? → ? Abstract? → ? digital signature
2. Digital certificates
References:
1)/blog/20 1 1/08/what _ is _ a _ digital _ signature . html? (concise and easy to understand)
2)/ Chen Hongbin/Articles/Details /6678635? (More detailed and formal)