System and method for verifying digital signatures on certificates

A method for confirming credentials system and method based on digital signature, which can use, with coded for processing message. In one embodiment, wherein signature data operation, digital signature of success apparatus, the buffer is used to confirm the digital signature the common key. And realizes the data digital signature then which is; the substrates are used to confirm the digital signature of the key is compare with buffer key. A key matched; and a confirm the digital signature successfully, it has no need end part and public key to the decoding apparatus signature operations of all data.