Time domain-based encryption and strategy updating method for edge environment

Abstract

The invention discloses a time domain-based encryption and strategy updating method for an edge environment. The method specifically comprises a system initialization process, a user registration process, a data encryption process, a user private key generation process and a ciphertext decryption process. Considering that time is an important factor in practical application, time information is added into an attribute-based encryption method, so that data access control can be more flexible. And secondly, due to the distributed computing and storage resource structure of the edge computing, the architecture of a multi-authorization mechanism and the characteristics of outsourcing decryption can be matched, the computing pressure of the terminal equipment is well shared, the energy loss ofthe equipment is reduced, and the attribute-based encryption system is safer and more reliable. The invention further provides an efficient dynamic strategy updating method, so that a data owner doesnot need to redeem the ciphertext from the network and then encrypt and publish the ciphertext again, the old ciphertext can be updated, and the confidentiality of the data is ensured.

Description

Technical field [0001] The invention relates to the technical field of computer information security, in particular to a ciphertext strategy attribute-based encryption method for data collection and sharing in an edge computing environment and a strategy update method thereof. Background technique [0002] With the development of the Internet of Things and the popularization of 5G networks, there will be more and more terminal devices scattered at the edge of the network, and these devices will generate massive amounts of data and bring new computing and security challenges. In addition, more and more user demands have promoted the development of complex applications and services with low latency, such as augmented reality, virtual reality, intelligent transportation and smart cities. In order to meet the requirements of the above-mentioned applications and improve the user experience, edge computing is proposed as a new distributed processing computing paradigm to solve the abov...

AI Technical Summary

Problems solved by technology

So this structure will undoubtedly cause some problems

First of all, it has a performance bottleneck. If a large number of users send a private key distribution request to an authority at the same time, the time for these users to obtain the private key will be much longer than the average private key distribution time.

Secondly, there is also a single point of failure in security, since this authority knows the private parameters of all attributes, when it suffers malicious intrusion, the attacker can make any private key he wants, causing the whole system to crash

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