Patent ID: 7539861

Claim:
A method of creating a digital certificate for a user comprising: generating a user private key and a user public key; obtaining a set of attributes containing data pertaining to the user and useful to an issuing party issuing the digital certificate; encrypting a combination of said user public key and said set of attributes using an issuer private key to create an encrypted data set; creating a digital certificate containing the user public key, the set of attributes, the encrypted data set, and an issuing-party identifier; storing the digital certificate at a user-allocated memory segment of a certificate library server; storing said user private key and an address of said certificate library server on a chip card of said user, whereby said digital certificate is stored remote from said chip card; creating a certificate chain using the digital certificate; and storing the certificate chain in the user-allotted memory segment of the certificate library server, wherein the certificate library server stores a plurality of said certificate chains of other said users, said certificate library server including: a plurality of said user-allocated memory segments each being accessible by an address contained in one said chip card of one said user; a plurality of said certificate chains issued to the one said user, wherein the plurality of said certificate chains are included in one of the user-allocated memory segments and wherein each said certificate chain is issued to the one said user by an issuer; an issuer identifier associated with each said certificate chain that identifies the issuer on whose behalf the digital certificate is provided in the certificate library server; a user first cryptographic key included in each said certificate chain, said user first cryptographic key having a corresponding user second cryptographic key being stored in the one said chip card of the one said user; a set of user attributes included in each said certificate chain providing information regarding the relationship between the one said user and the issuer associated with the digital certificate chain; and a trusted root certificate for each said certificate chain, with the corresponding trusted root differing from other trusted certificate roots stored at the corresponding user-allocated memory segment.