Time-specific encryption from forward-secure encryption: generic and direct constructions
Time-specific encryption from forward-secure encryption: generic and direct constructions
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DOI：
10.1007/s10207-015-0304-y
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发表时间：
2015-11
影响因子：
3.2
通讯作者：
Kohei Kasamatsu;Takahiro Matsuda;K. Emura;Nuttapong Attrapadung;Goichiro Hanaoka;H. Imai
中科院分区：
文献类型：
--
作者：
Kohei Kasamatsu;Takahiro Matsuda;K. Emura;Nuttapong Attrapadung;Goichiro Hanaoka;H. Imai
Paterson和Quaglia（SCN 2010）提出了时间特定加密（TSE）的概念及其有效构造。TSE是一种具有附加功能的公钥加密类型，其中加密器可以指定合适的时间间隔，这意味着密文只能在该时间间隔内解密。在这项工作中，我们提出了一种新的方法来设计有效的TSE方案，通过使用前向安全加密（FSE），并基于这种方法，我们提出了一个特定的TSE方案使用Boneh-Boyen-Goh FSE，和一个通用的建设从任何FSE。我们提出的TSE方案在计算成本和数据大小方面都是实用的。在渐近意义下，我们的方案中的密文和公共参数的大小显着小于以前的方案。
Paterson and Quaglia (SCN 2010) proposed the concept of time-specific encryption (TSE) and its efficient constructions. TSE is a type of public-key encryption with an additional functionality where an encryptor can specify a suitable time interval, meaning that the ciphertexts may only be decrypted within this time interval. In this work, we propose a new methodology for designing efficient TSE schemes by using forward-secure encryption (FSE), and based on this methodology, we present a specific TSE scheme using Boneh–Boyen–Goh FSE, and a generic construction from any FSE. Our proposed TSE schemes are practical inallaspects with regard to computational costs and data sizes. The sizes of the ciphertext and the public parameter in our schemes are significantly smaller than those in previous schemes in an asymptotic sense.