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Security Vulnerability in a Non-Interactive ID-Based Proxy Re-encryption Scheme
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- Authors
- Woo Kwon Koo, Jung Yeon Hwang, Dong Hoon Lee
- Issue Date
- 2009-11
- Citation
- Information Processing Letters, v.109, no.23-24, pp.1260-1262
- ISSN
- 0020-0190
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- Recently, a non-interactive identity-based proxy re-encryption scheme was proposed for achieving CCA-security. In the paper, we show that the identity-based proxy re-encryption scheme is unfortunately vulnerable to a collusion attack. The collusion of a proxy and a malicious user enables two parties to derive other honest user's private key and thereby decrypt ciphertexts intended for the honest user. © 2009 Elsevier B.V. All rights reserved.
- KSP Keywords
- CCA-security, Encryption Scheme, ID-based, Malicious user, Non-interactive, Security vulnerabilities, collusion attacks, identity-based proxy re-encryption, private Key