Combined schemes for signature and encryption: The public-key and the identity-based setting

被引：5
|
作者：
Gonzalez Vasco, Maria Isabel [1 ]
Hess, Florian [2 ]
Steinwandt, Rainer [3 ]
机构：
[1] Univ Rey Juan Carlos, Dept Matemat Aplicada, C Tulipan S-N, Madrid 28933, Spain
[2] Carl von Ossietzky Univ Oldenburg, Inst Math, D-26111 Oldenburg, Germany
[3] Florida Atlantic Univ, Dept Math Sci, 777 Glades Rd, Boca Raton, FL 33431 USA
来源：
INFORMATION AND COMPUTATION | 2016年 / 247卷
关键词：
Combined scheme; Identity-based cryptography; Public-key cryptography; Key separation; SECURITY PROOFS;
D O I：
10.1016/j.ic.2015.11.001
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
Consider a scenario in which parties use a public-key encryption scheme and a signature scheme with a single public key/private key pair-so the private key sk is used for both signing and decrypting. Such a simultaneous use of a key is in general considered poor cryptographic practice, but from an efficiency point of view looks attractive. We offer security notions to analyze such violations of key separation. For both the identity- and the non-identity-based setting, we show that-although being insecure in general-for schemes of interest the resulting combined scheme can offer strong security guarantees. (C) 2015 Elsevier Inc. All rights reserved.
引用
收藏
页码：1 / 10
页数：10
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