| Presentation | 2006-11-16 A Study on Selective Encryption Methods for DCT Coefficients Kazushi OKAMOTO, Masahiro DEGUCHI, Akihiro SHIMIZU, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Multimedia communications have been developing, and protection of video contents is an important issue. Encryption techniques are effective for the protection. Especially, a selective encryption method of DCT coefficients can protect the contents without high-processing loads. Such an encryption method reduces encryption bits and encrypts specific DCT coefficients. However, if statistical behaviors of DCT coefficient values have characteristics, then there is a risk of ciphertext-only attacks. In this paper, the statistical behaviors of DCT coefficient values have been computed to some sample images. Finally, the risk, which existing selective encryption methods of DCT coefficients are vulnerable to ciphertext-only attacks, has been evaluated with the statistical behaviors. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Multimedia Data Security / Selective Encryption / MPEG / Discrete Cosine Transform |
| Paper # | ISEC2006-90,OIS2006-48 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2006/11/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Information Security (ISEC) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Selective Encryption Methods for DCT Coefficients |
| Sub Title (in English) | |
| Keyword(1) | Multimedia Data Security |
| Keyword(2) | Selective Encryption |
| Keyword(3) | MPEG |
| Keyword(4) | Discrete Cosine Transform |
| 1st Author's Name | Kazushi OKAMOTO |
| 1st Author's Affiliation | Kochi University of Technology() |
| 2nd Author's Name | Masahiro DEGUCHI |
| 2nd Author's Affiliation | Kochi University of Technology |
| 3rd Author's Name | Akihiro SHIMIZU |
| 3rd Author's Affiliation | Kochi University of Technology |
| Date | 2006-11-16 |
| Paper # | ISEC2006-90,OIS2006-48 |
| Volume (vol) | vol.106 |
| Number (no) | 351 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |