| 摘要 |
Methods, systems, and computer programs for issuing an implicit certificate are disclosed. In some implementations, a certificate authority of an elliptic curve cryptography (ECC) system performs one or more operations for issuing the implicit certificate. A certificate request associated with a requester is received, and the certificate request includes a first element R U in a group. In response to receiving the request, a second element P U in the group is generated based on the first element R U . An implicit certificate Cert U is generated based on the second element P U . Whether the public key Q U of the requester corresponds to a trivial public key, such as an identity element of the group, can be determined. For example, the certificate authority can compute the public key Q U of the requester based on the first element P U , the implicit certificate Cert U , and a public key Q CA of the certificate authority.
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