Securely Obfuscating Re-Encryption

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Susan Hohenberger, Guy N. Rothblum, Abhi Shelat, Vinod Vaikuntanathan

Published: 2011, Last Modified: 16 May 2025J. Cryptol. 2011EveryoneRevisionsBibTeXCC BY-SA 4.0
Abstract: We present a positive obfuscation result for a traditional cryptographic functionality. This positive result stands in contrast to well-known impossibility results (Barak et al. in Advances in Cryptology—CRYPTO’01, 2002), for general obfuscation and recent impossibility and implausibility (Goldwasser and Kalai in 46th IEEE Symposium on Foundations of Computer Science (FOCS), pp. 553–562, 2005) results for obfuscation of many cryptographic functionalities.