Patent ID: 7249102

Claim:
An original data circulation method in an original data circulation system for storing or circulating original data which is digital information, the method comprising: sending, by a first apparatus, the original data and accredited information to a second apparatus; generating and storing, by the second apparatus, a number uniquely indicating a session for the original data, and sending session information including the number in the session information to the first apparatus; sending, by the first apparatus, originality information, the session information and a third party certificate to the second apparatus, the originality information including a fingerprint corresponding to a source apparatus of the original data and second information corresponding to the original data, the third party certificate being a certificate representing that the first apparatus is authenticated by a third party, and performing an authentication step of identifying and authenticating, by the second apparatus, the source apparatus, verifying whether the source apparatus is the same as an apparatus corresponding to the fingerprint, and determining that the originality information is valid if the source apparatus is the same as an apparatus corresponding to the fingerprint, and wherein, in the authentication step, the second apparatus authenticates the first apparatus by verifying that the third party certificate authenticates the first apparatus and that a certifier of the third party certificate is included in third parties in the accredited formation received from the first apparatus, and checks whether the number in the session information is included in numbers stored in the second apparatus and deletes the number in the session information from the stored numbers if the number in the session information is included in the stored numbers.