To decrease the storage space and improve the search velocity of CRL(Certificate Revocation List),a bit pointer was used to shorten the certificate number of it.

• 从证书序列号出发,引用位标识指针将证书序列号缩减,以减少证书撤销列表(CertificateRevocationList,CRL)所需空间,提高CRL的查询速度,并成功构造了一棵新型撤销证书查询树。