Method and system for processing attribute based encryption in batch

Abstract

The invention discloses a method and a system for processing attribute based encryption in batch. The method comprises the following steps: S1, according to input security parameters, acquiring a main key of each authentication mechanism among a plurality of authentication mechanisms; S2, according to the main key and the attribute of each decryptor, acquiring a private key of each decryptor, wherein the set of the attributes of the decryptors is matched with an access control structure; S3, selecting, by an encryptor, target decryptors with the same attribute, encrypting a message according to the main keys of the authentication mechanisms to which the target decryptors belong and the attributes of the target decryptors to obtain a ciphertext, and sending the ciphertext to a cloud server; S4, receiving, by the target decryptors, the ciphertext of the server, and judging whether the set of the attributes of the target decryptors is matched with the access control structure or not; and S5, if matching, performing further decryption to obtain a message. By adopting the method, the computation overhead for encryption can be reduced, the computation rate can be improved, and the communication traffic can be reduced at the same time.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a batch processing attribute-based encryption method and system. Background technique [0002] Traditional encryption mechanisms based on public key infrastructure can protect the confidentiality of communication data. However, in the process of encrypting through the above mechanism, the encryptor must obtain the public key certificate of the communication object (that is, the decryptor), and if the encryptor wants to encrypt the data of a certain type of decryptor in a certain system, it also needs Obtain the public key of each decryptor separately and perform calculations separately. [0003] At present, an attribute-based encryption mechanism is proposed in related technologies. Through this mechanism, the encryptor can use the attributes of the decryptor to encrypt the communication data without obtaining the public key of the decryptor, and if multiple decryp...

AI Technical Summary

Problems solved by technology

There will undoubtedly still be repeated calculations, so the calculation overhead is large and the calculation rate is low

At the same time, the encryption performed separately generates more ciphertexts, so the communication volume is larger

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