Secure Obfuscation for Encrypted Signatures

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Provided by: International Association for Cryptologic Research
Topic: Security
Format: PDF
Obfuscation is one of the most intriguing open problems in cryptography and only a few positive results are known. In TCC'07, the researcher proposed an obfuscator for a re-encryption functionality, which takes a ciphertext for a message encrypted under Alice's public key and transforms it into a ciphertext for the same message under Bob's public key. It is the first complicated cryptographic functionality that can be securely obfuscated, but obfuscators for such cryptographic functionalities are still elusive.
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