Digital, the system and the method of renewing the certificate which signs and expanding

摘要

The statement which signs newly digitally (the certificate) the system which is formed, method, and the computer program product are offered. Was formed the new certificate inside renewal procedure for signing which is impaired can be utilized. The system of this invention, method, and the computer program product form the new certificate by receiving the early list of the certificate which includes the plural certificates, verify the certainty of the respective plural certificates, calculate the new certificate making use of compilation algorithm, sign to the new certificate, correct the list of the certificate, and attach the list to the new certificate when correcting.