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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/9847

Title: Hidden Credential Retrieval Without Random Oracles
Authors: Miyaji, Atsuko
Rahman, Mohammad Shahriar
Soshi, Masakazu
Keywords: Hidden Credential Retrieval
Blind Signature
Insider Security
Outsider Security
Collusion Resistance
Issue Date: 2011
Publisher: Springer
Magazine name: Lecture Notes in Computer Science
Volume: 6513/2011
Start page: 160
End page: 174
DOI: 10.1007/978-3-642-17955-6_12
Abstract: To address the question of secure and efficient management of the access credentials so that a user can store and retrieve them using a ‘short and easy-to-remember’ password in a connected world、 X. Boyen proposed a user-centric model in ASIACCS’09、 named Hidden Credential Retrieval (HCR). The protocol was shown secure under random-oracle model. However, the construction does not explicitly prevent an HCR server from colluding with the third party service provider (i.e., an online bank), which can result into retrieving the hidden credential without the user’s participation. In this paper, we show the HCR construction without the random-oracles with enhanced properties based on Okamoto’s blind signature scheme proposed in TCC’06. For the “Insider attack” model, we provide the attacker (server) with more computational ability in trying to recover the plaintext message from the ciphertext that has been stored in the server by the user, being completely offline. Moreover, we include an explicit notion of identity ID that is useful in practice, so that the server knows whose encrypted credential is to be used in the protocol.
Rights: This is the author-created version of Springer, Atsuko Miyaji, Mohammad Shahriar Rahman and Masakazu Soshi, Lecture Notes in Computer Science, 6513/2011, 2011, 160-174. The original publication is available at www.springerlink.com, http://dx.doi.org/10.1007/978-3-642-17955-6_12
URI: http://hdl.handle.net/10119/9847
Material Type: author
Appears in Collections:b10-1. 雑誌掲載論文 (Journal Articles)

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