Visible to the public Lightweight Searchable Encryption Scheme Based on Certificateless Cryptosystem

TitleLightweight Searchable Encryption Scheme Based on Certificateless Cryptosystem
Publication TypeConference Paper
Year of Publication2019
AuthorsYang, Xiaodong, Chen, Guilan, Wang, Meiding, Pei, Xizhen
Conference Name2019 4th International Conference on Mechanical, Control and Computer Engineering (ICMCCE)
Keywordscertificate management problem, certificateless cryptosystem, certificateless encryption schemes, ciphertext data, cloud data, cloud server, cloud storage, cloud storage environments, composability, cryptography, data owner stores, digital signatures, file index, identity-based cryptosystem, key escrow problem, keyword encryption, Lightweight, lightweight searchable encryption scheme, multiuser ciphertext retrieval, partial private key, private key cryptography, pubcrawl, public key cryptography, resilience, Resiliency, Searchable encryption, searchable encryption schemes, searchable encryption technology, secret value, third-party manager
AbstractSearchable encryption technology can guarantee the confidentiality of cloud data and the searchability of ciphertext data, which has a very broad application prospect in cloud storage environments. However, most existing searchable encryption schemes have problems, such as excessive computational overhead and low security. In order to solve these problems, a lightweight searchable encryption scheme based on certificateless cryptosystem is proposed. The user's final private key consists of partial private key and secret value, which effectively solves the certificate management problem of the traditional cryptosystem and the key escrow problem of identity-based cryptosystem. At the same time, the introduction of third-party manager has significantly reduced the burden in the cloud server and achieved lightweight multi-user ciphertext retrieval. In addition, the data owner stores the file index in the third-party manager, while the file ciphertext is stored in the cloud server. This ensures that the file index is not known by the cloud server. The analysis results show that the scheme satisfies trapdoor indistinguishability and can resist keyword guessing attacks. Compared with similar certificateless encryption schemes, it has higher computational performance in key generation, keyword encryption, trapdoor generation and keyword search.
Citation Keyyang_lightweight_2019