Cipher text access control system based on cloud computing platform

Abstract

The invention discloses a cipher text access control system based on a cloud computing platform. The system comprises a cloud storage service module, a plaintext preprocessing module, a secret key generation module, an encryption module, a decryption module and a user access module. A plaintext of a user owner client is encrypted in a triple manner to obtain a triple encrypted cipher text, the triple encrypted cipher text is packaged by utilizing a digital envelope technology and then stored in the cloud storage service module, and the corresponding decryption module is arranged. Fine access control can be realized, computing cost of encryption and decryption between a user owner and a user can be reduced effectively, the data confidentiality is ensured, and collusion-proof aggressivity and forward and backward safety are included; and the cipher text access control system is controlled in different levels, the efficiency of access control is improved, a code division multiplexing technology is used to code plaintext information, the cipher text storage space is reduced, and the total performance of the system is improved.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a ciphertext access control system based on a cloud computing platform. Background technique [0002] Cloud computing is a new computing model that can more effectively use computing resources to provide users with various data services. It links together a large number of computing resources, storage resources and software resources, and uses virtual technology to provide users with customizable Computing, storage and application services, avoiding the construction and maintenance of users' own heavy infrastructure. However, the centrally managed cloud computing center will become the key target of hacker attacks. Due to its unprecedented openness and complexity, its security is facing a more severe test than ever before. The access control of cloud computing big data resources is the key to cloud computing security. The core of the problem is that access control i...

AI Technical Summary

Problems solved by technology

In this case, a malicious key generation center can decrypt all ciphertexts of any user, what's more, the key generation center may maliciously distribute the user's private key

At the same time, on the cloud computing platform, users cannot trust the cloud service provider to faithfully implement the user-defined access control scheme, and the security is poor.

In addition, the attribute-based encryption scheme also has problems such as high encryption and decryption calculation overhead for user owners and ordinary users in the cloud storage environment, and complex management of cloud storage service modules brought about by the flexibility of access control.

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