A Timed-Release Proxy Re-Encryption Scheme
نویسندگان
چکیده
منابع مشابه
A Timed-Release Proxy Re-encryption Scheme and Its Application to Fairly-Opened Multicast Communication
Timed-Release Encryption (TRE) (proposed by May in 1993) prevents even a legitimate recipient decrypting a ciphertext before a semi-trusted Time Server (TS) sends trapdoor sT assigned with a release time T of the encryptor’s choice. Cathalo et al. (ICICS2005) and Chalkias et al. (ESORICS2007) have already considered encrypting a message intended to multiple recipients with the same release time...
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To allow a delegator not only to delegate the keyword-controlled decryption rights of a broadcast encryption to a set of specified recipients, but also to control when the decryption rights will be delegated, in this paper, for the first time, we introduce a new notion called TimedRelease Conditional Proxy Broadcast Re-Encryption (TR-CPBRE). We also propose a concrete construction for TR-CPBRE ...
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Proxy re-encryption is a cryptographic primitive developed to delegate the decryption right from one party (the delegator) to another (the delegatee). In a proxy re-encryption scheme, the delegator assigns a key to a proxy to re-encrypt all messages encrypted with his public key such that the re-encrypted ciphertexts can be decrypted with the delegatee’s private key. We propose a type-and-ident...
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In 1998, Blaze, Bleumer, and Strauss proposed a kind of cryptographic primitive called proxy re-encryption[3]. In proxy re-encryption, a proxy can transform a ciphertext computed under Alice’s public key into one that can be opened under Bob’s decryption key. In 2007, Matsuo proposed the concept of four types of proxy re-encryption schemes: CBE(Certificate Based Public Key Encryption) to IBE(Id...
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A proxy re-encryption scheme (PRE) allows a semi-trusted proxy to convert a ciphertext encrypted under one key into a ciphertext encrypted under another key without leaking the underlying plaintext. In the process of the arithmetic processing, proxy should be able to learn as little information about the plaintext as possible. Conditional proxy re-encryption (CPRE) is a new cryptography primiti...
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عنوان ژورنال:
- IEICE Transactions
دوره 94-A شماره
صفحات -
تاریخ انتشار 2011