On the security of two identity-based conditional proxy re-encryption schemes

• Main Authors: HE, Kai, WENG, Jian, DENG, Robert H., LIU, Joseph K.
• Format: text
• Language: English
• Published: Institutional Knowledge at Singapore Management University 2016
• Subjects: Conditional proxy re-encryption; Identity-based; Single hop; Multi-hop; Chosen-ciphertext security; Information Security
• Online Access: https://ink.library.smu.edu.sg/sis_research/3881; https://ink.library.smu.edu.sg/context/sis_research/article/4883/viewcontent/SecurityIdentityBasedConditionalProxyReEncrytion_2016_afv.pdf
• Institution: Singapore Management University

Proxy re-encryption allows a semi-trusted proxy with a re-encryption key to convert a delegator's ciphertext into a delegatee's ciphertext, and the semi-trusted proxy cannot learn anything about the underlying plaintext. If a proxy re-encryption scheme is indistinguishable against chosen-c...