The problem was a famous one in the field – it had been proposed in the late 1970s by developers of the famous RSA public key encryption scheme.

这是密码学领域一个有名的难题--它于20世纪70年代末由著名的RSA公钥加密方案的开发人员提出的。

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It has strongpoint of symmetry encryption scheme such as encryption speed and encrypt intensity, but also has advantage of public key encryption scheme on key distribution and key management.

该方法兼有两类加密体制的优点：既有对称密码加密体制的加密速度快，强度高的优点，又拥有公钥密码体制在密钥分发与管理上的优势。

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A public key tracing and revocation scheme can combine the public key encryption with the traitor tracing algorithm.

公钥加密算法和追踪算法结合在一起，可构成一个公钥广播加密方案。

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