General surrogate key generation method for identity-based proxy cryptography method

Abstract

Provided is a general surrogate key generation method for an identity-based proxy cryptography method. The general surrogate key generation method can be applied to any known identity-based cryptography method. The general surrogate key generation method directly adopts a certificate of authorization as a surrogate public key. A Hash function is adopted to encrypt middle parameters. Various efficient identity-based proxy cryptography methods which are established by using the method of the invention can be widely applied to electronic commerce, mobile agents, distributed networks, etc., and greatly enhance the running efficiency and safety.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a general proxy key generation method in an identity-based proxy encryption method. Background technique [0002] No matter in the real environment or the network environment, people often need to entrust some of their rights to a reliable agent, and let the agent exercise these rights on their own behalf. For example, the manager of a company or the leader of a unit is on a business trip. In order not to affect the normal operation of the company or unit, he can entrust his secretary or assistant to sign some important documents on his behalf during his business trip; another example is an online sales For the company, due to the large number of trading users, the service quality of the main server has declined, and the network delay has increased, which has seriously affected the user experience. At this time, the company can entrust some secondary service provide...

AI Technical Summary

Problems solved by technology

Since the scheme needs to use the proxy public key in the verification process, it takes a lot of time to reconstruct the proxy public key in the final generated scheme, which is complex and inefficient.

[0005] 2. The surrogate key is generated in a single way and has no versatility

More importantly, these surrogate key generation methods can only be used for this scheme proposed by this author, and cannot be used for schemes proposed by other authors

Since the generation method of the surrogate key needs to be re-established every time, the design cost and time overhead are greatly increased

[0006] 3. The transfer of proxy keys requires a secret channel, which reduces security

Most identity-based proxy cryptographic schemes require secret channels to pass the generated parameters in the process of proxy key generation. If secret channels are not used, these parameters will be exposed, and the adversary can easily obtain these parameters. Once the adversary obtains these parameters, they Attacks and all kinds of damage can be carried out, which undoubtedly greatly reduces the security of the scheme

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