(57) ABSTRACT A system and method for communicating information between a first party
and a second party, comprising the steps of receiving, by an intermediary, an identifier of …

We propose the first fully homomorphic encryption scheme, solving an old open problem.
Such a scheme allows one to compute arbitrary functions over encrypted data without the …

Informally, an obfuscator O is an (efficient, probabilistic)“compiler” that takes as input a
program (or circuit) P and produces a new program O (P) that has the same functionality as …

In a proxy re-encryption (PRE) scheme, a proxy is given special information that allows it to
translate a ciphertext under one key into a ciphertext of the same message under a different …

Informally, an obfuscator O is an (efficient, probabilistic)“compiler” that takes as input a
program (or circuit) P and produces a new program O (P) that has the same functionality as …

Proxy re-encryption (PRE) allows a semi-trusted proxy to convert a ciphertext originally
intended for Alice into one encrypting the same plaintext for Bob. The proxy only needs a re …

In a proxy re-encryption scheme, a semi-trusted proxy can transform a ciphertext under
Alice's public key into another ciphertext that Bob can decrypt. However, the proxy cannot …

Cloud computing denotes an architectural shift toward thin clients and conveniently
centralized provision of computing resources. Clients' lack of direct resource control in the …

Abstract In 1998, Blaze, Bleumer, and Strauss proposed a cryptographic primitive called
proxy re-encryption, in which a proxy transforms–without seeing the corresponding plaintext …

Proxy re-encryption (PRE) allows a proxy to convert a ciphertext encrypted under one key
into an encryption of the same message under another key. The main idea is to place as …