A Secure and Efficient Ciphertext Encryption Scheme Based on Attribute and Support Strategy Dynamic Update Via Hybrid Encryption Method

Yanhua Wang ； Yaqiu Liu ； Kun Wang

《International Journal of Network Security》 20卷5期 (2018/09) Pp. 907-913

https://doi.org/10.6633/IJNS.201809_20(5).12

摘要

Traditional ciphertext encryption scheme easily leaks individual data privacy information. Therefore, this paper proposes a secure and efficient ciphertext encryption scheme based on attribute and support strategy dynamic update via hybrid encryption method. The asymmetric encryption algorithm (ASE) is adopted to encrypt the data and the attribute-based encryption algorithm (ABEA) to encrypt the sharing key. The results are stored in cloud with the form of ciphertext, which ensures the security of stored data. Meanwhile, it reduces the number of ciphertext variable parameters, this way saves the energy consumption of physiological sensors. Access strategy of dynamic update technology is based on attribute encryption algorithm which provides an extension features, it is the effective way to achieve fine-grained access control. Dynamic update technology allows data owner to dynamically update ciphertext access information in the clouds. Through comparing the proposed scheme with the state-of-the-art schemes in terms of performance, the experimental results show that the proposed scheme can ensure the security of the stored data. In addition, it has a low communication and computation overhead, which proves that our new scheme has higher performance than other encryption schemes.

關鍵字

Asymmetric Encryption ； Ciphertext Encryption Scheme ； Data Privacy ； Energy Consumption ； Support Strategy Dynamic Update