Intrusion-resilient identity-based signatures: Concrete scheme in the standard model and generic construction

2018 ◽  
Vol 442-443 ◽  
pp. 158-172 ◽  
Author(s):  
Jia Yu ◽  
Rong Hao ◽  
Hui Xia ◽  
Hanlin Zhang ◽  
Xiangguo Cheng ◽  
...  
Keyword(s):  
Standard Model ◽  
The Standard Model ◽  
Generic Construction ◽  
Identity Based

scholarly journals Efficient identity-based encryption with Hierarchical key-insulation from HIBE

2021 ◽  
Author(s):  
Keita Emura ◽  
Atsushi Takayasu ◽  
Yohei Watanabe
Keyword(s):  
Standard Model ◽  
Special Requirement ◽  
Identity Based Encryption ◽  
The Standard Model ◽  
Secret Keys ◽  
Generic Construction ◽  
Identity Based ◽  
Important Notion ◽  
Effective Design ◽  
Key Exposure

AbstractHierarchical key-insulated identity-based encryption (HKIBE) is identity-based encryption (IBE) that allows users to update their secret keys to achieve (hierarchical) key-exposure resilience, which is an important notion in practice. However, existing HKIBE constructions have limitations in efficiency: sizes of ciphertexts and secret keys depend on the hierarchical depth. In this paper, we first triumph over the barrier by proposing simple but effective design methodologies to construct efficient HKIBE schemes. First, we show a generic construction from any hierarchical IBE (HIBE) scheme that satisfies a special requirement, called MSK evaluatability introduced by Emura et al. (Des. Codes Cryptography 89(7):1535–1574, 2021). It provides several new and efficient instantiations since most pairing-based HIBE schemes satisfy the requirement. It is worth noting that it preserves all parameters’ sizes of the underlying HIBE scheme, and hence we obtain several efficient HKIBE schemes under the k-linear assumption in the standard model. Since MSK evaluatability is dedicated to pairing-based HIBE schemes, the first construction restricts pairing-based instantiations. To realize efficient instantiation from various assumptions, we next propose a generic construction of an HKIBE scheme from any plain HIBE scheme. It is based on Hanaoka et al.’s HKIBE scheme (Asiacrypt 2005), and does not need any special properties. Therefore, we obtain new efficient instantiations from various assumptions other than pairing-oriented ones. Though the sizes of secret keys and ciphertexts are larger than those of the first construction, it is more efficient than Hanaoka et al.’s scheme in the sense of the sizes of master public/secret keys.

scholarly journals Revocable and strongly unforgeable identity-based signature scheme in the standard model

2016 ◽  
Vol 9 (14) ◽  
pp. 2422-2433 ◽  
Author(s):  
Zhenhua Liu ◽  
Xiangsong Zhang ◽  
Yupu Hu ◽  
Tsuyoshi Takagi
Keyword(s):  
Standard Model ◽  
Signature Scheme ◽  
The Standard Model ◽  
Identity Based

Insecurity of an Efficient Identity-Based Proxy Signature in the Standard Model

2014 ◽  
Vol 58 (10) ◽  
pp. 2507-2508 ◽  
Author(s):  
Debiao He ◽  
Mingwu Zhang ◽  
Baowen Xu
Keyword(s):  
Standard Model ◽  
Proxy Signature ◽  
The Standard Model ◽  
Identity Based
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