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Forward-Security Under Continual Leakage Read chapter Read first chapter

2018 | OriginalPaper | Chapter

A Provably-Secure Unidirectional Proxy Re-encryption Scheme Without Pairing in the Random Oracle Model

Authors : S. Sharmila Deva Selvi, Arinjita Paul, Chandrasekaran Pandurangan

Published in: Cryptology and Network Security

Publisher: Springer International Publishing

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Abstract

Proxy re-encryption (PRE) enables delegation of decryption rights by entrusting a proxy server with special information, that allows it to transform a ciphertext under one public key into a ciphertext of the same message under a different public key, without learning anything about the underlying plaintext. In Africacrypt 2010, the first PKI-based collusion resistant CCA secure PRE scheme without pairing was proposed in the random oracle model. In this paper, we point out an important weakness in the security proof of the scheme. We also present a collusion-resistant pairing-free unidirectional PRE scheme which meets CCA security under a variant of the computational Diffie-Hellman hardness assumption in the random oracle model.

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previous chapter A Novel Algorithm for Secret Key Generation in Passive Backscatter Communication Systems
next chapter Computational Aspects of Ideal (t, n)-Threshold Scheme of Chen, Laing, and Martin
Literature
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Sharmila Deva Selvi, S., Paul, A., Rangan, C.P.: A provably-secure unidirectional proxy re-encryption scheme without pairing in the random oracle model (full version). Cryptology ePrint Archive, October 2017
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Weng, J., Deng, R.H., Liu, S., Chen, K.: Chosen-ciphertext secure bidirectional proxy re-encryption schemes without pairings. Inf. Sci. 180(24), 5077–5089 (2010)MathSciNetCrossRef
Metadata
Title
A Provably-Secure Unidirectional Proxy Re-encryption Scheme Without Pairing in the Random Oracle Model
Authors
S. Sharmila Deva Selvi
Arinjita Paul
Chandrasekaran Pandurangan
Copyright Year
2018
Book
Cryptology and Network Security

Print ISBN: 978-3-030-02640-0

Electronic ISBN: 978-3-030-02641-7

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-3-030-02641-7_21

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