Efficient revocable certificateless encryption against decryption key exposure. Issue 3 (1st May 2015)

• Record Type: Journal Article
• Authors: Sun, Yinxia; Zhang, Futai; Shen, Limin; Deng, Robert H.
• Is Part Of: IET information security. Volume 9:Issue 3(2015)
• Page Start: 158
• Page End: 166
• Publication Date: 2015-05-01
• Subjects: public key cryptography; efficient revocable certificateless encryption scheme -- decryption key exposure -- certificateless public key cryptosystem -- CLPKC -- identity based public key cryptosystem -- key‐escrow free -- security weakness -- scalable revocable certificateless encryption scheme -- RCLE -- standard model; Computer security -- Periodicals; Cryptography -- Periodicals; Computer networks -- Security measures -- Periodicals; Database security -- Periodicals; 005.8
• DOI: 10.1049/iet-ifs.2014.0145
• Languages: English
• ISSNs: 1751-8709

Abstract

Abstract : Certificateless public key cryptosystem (CLPKC) improves the identity based public key cryptosystem to be key‐escrow free. Many research works on CLPKC have been presented so far. However, the revocation problem in CLPKC still lacks effective solutions. The current revocation approaches suffer from either low efficiency or security weakness. In this study, we propose the first 'scalable revocable' certificateless encryption (RCLE) scheme against 'decryption key exposure'. The scheme is provably secure in the standard model. Moreover, we give a second interesting RCLE scheme whose decryption key is very short.