| 講演抄録/キーワード |
| 講演名 |
2012-05-18 16:55
[招待講演]On the Joint Security of Encryption and Signature, Revisited Kenneth Paterson(RHUL)・○Jacob Schuldt(RCIS, AIST)・Martijn Stam(Univ. of Bristol)・Susan Thomson(RHUL) ISEC2012-8 |
| 抄録 |
(和) |
The folklore principle of key separation dictates using different keys for different cryptographic operations. While this is well-motivated by real-world, security concerns, there are still situations where it is desirable to use the same key for multiple operations. We revisit the problem of how to construct combined public key schemes, wherein a single keypair is used for both encryption and signature primitives in a secure manner. We give a general construction that uses IBE as a component and furthermore provide a more efficient direct construction. Lastly, we consider the problem of building signcryption schemes from combined public key schemes. |
| (英) |
The folklore principle of key separation dictates using different keys for different cryptographic operations. While this is well-motivated by real-world, security concerns, there are still situations where it is desirable to use the same key for multiple operations. We revisit the problem of how to construct combined public key schemes, wherein a single keypair is used for both encryption and signature primitives in a secure manner. We give a general construction that uses IBE as a component and furthermore provide a more efficient direct construction. Lastly, we consider the problem of building signcryption schemes from combined public key schemes. |
| キーワード |
(和) |
combined public key schemes / standard model / / / / / / |
| (英) |
combined public key schemes / standard model / / / / / / |
| 文献情報 |
信学技報, vol. 112, no. 39, ISEC2012-8, pp. 43-43, 2012年5月. |
| 資料番号 |
ISEC2012-8 |
| 発行日 |
2012-05-11 (ISEC) |
| ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
| PDFダウンロード |
ISEC2012-8 |
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