...证书体制，避免了证书的复杂管理，但是这也不可避免地带来了另外的问题，即密钥托管（key escrow）和密钥撤销（key revocation）Ihl题。
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The proposed MCL-PKE scheme eliminates the restrictions exerted on key escrow and key revocation in traditional identity-based public key cryptosystems.
该方案消除了在基于身份的公钥密码体制中存在的密钥托管和密钥撤销的限制。
参考来源 - 可快速撤销的无证书公钥加密方案·2,447,543篇论文数据，部分数据来源于NoteExpress
一旦生成密钥对，没有集中方式来撤销密钥，或确切地知道该密钥已向谁分发。
There is no centralized way to revoke a key once a key pair has been generated or to know exactly to whom the key has been distributed.
CA证书管理是PK I网络安全体系实施的关键，它涉及到密钥和证书从创建到撤销的整个过程。
Ca certification management is the key of PKI actualization. It includes all process from initialization to cancellation of the key and certification.
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