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| Presentation | 2013-12-11 16:25 A Storage Encryption Scheme: Unconditionally Secure Encryption of Unlimited Number of Keys using A Fixed Secret (Part 2) Kazuomi Oishi (Shizuoka Inst. of Science and Tech.)  ISEC2013-80 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | A storage encryption scheme is studied. In a storage encryption scheme, data encryption and key encryption are executed. From the viewpoint of security, unconditionally secure key encryption is preferable. If secret data that is necessary for decrypting multiple encrypted keys can have constant size, then key management can be efficient from the viewpoint of memory. A previously proposed storage encryption scheme that is claimed to satisfy these properties uses an encryption scheme, in which ElGamal public-key encryption scheme is utilized as a symmetric key encryption scheme. In this manuscript, the symmetric encryption scheme is shown insecure and the improved scheme and the improved storage encryption scheme are proposed. The proposed improved symmetric encryption scheme is unconditionally secure against previously known attacks. Given a prime $p$, size of secret key is $4|p|$, computation to encrypt a key with size $|p|$ is 6 exponentiations modulo $p$, decryption complexity is 2 exponentiations, and size of an encrypted key is $3|p|$. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | storage encryption / key encryption / key management / unconditionally secure / ElGamal / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 113, no. 342, ISEC2013-80, pp. 47-51, Dec. 2013. | |
| Paper # | ISEC2013-80 | |
| Date of Issue | 2013-12-04 (ISEC) | |
| ISSN | Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 | |
| Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) | |
| Download PDF | ISEC2013-80 |
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| Conference Information | |
| Committee | ISEC |
| Conference Date | 2013-12-11 - 2013-12-11 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kikai-Shinko-Kaikan Bldg. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | ISEC |
| Conference Code | 2013-12-ISEC |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Storage Encryption Scheme: Unconditionally Secure Encryption of Unlimited Number of Keys using A Fixed Secret (Part 2) |
| Sub Title (in English) | |
| Keyword(1) | storage encryption |
| Keyword(2) | key encryption |
| Keyword(3) | key management |
| Keyword(4) | unconditionally secure |
| Keyword(5) | ElGamal |
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| Keyword(8) | |
| 1st Author's Name | Kazuomi Oishi |
| 1st Author's Affiliation | Shizuoka Institute of Science and Technology (Shizuoka Inst. of Science and Tech.) |
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| Speaker | Author-1 |
| Date Time | 2013-12-11 16:25:00 |
| Presentation Time | 25 minutes |
| Registration for | ISEC |
| Paper # | ISEC2013-80 |
| Volume (vol) | vol.113 |
| Number (no) | no.342 |
| Page | pp.47-51 |
| #Pages | 5 |
| Date of Issue | 2013-12-04 (ISEC) |
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