Leakage-Resilient Revocable Identity-Based Signature with Cloud Revocation Authority

Abstract

Very recently, side-channel attacks have threatened all traditional cryptographic schemes. Typically, in traditional cryptography, private/secret keys are assumed to be completely hidden to adversaries. However, by side-channel attacks, an adversary may extract fractional content of these private/secret keys. To resist side-channel attacks, leakage-resilient cryptography is a countermeasure. Identity-based public-key system (ID-PKS) is an attractive public-key setting. ID-PKS settings not only discard the certificate requirement, but also remove the construction of the public-key infrastructure. For solving the user revocation problem in ID-PKS settings, revocable ID-PKS (RID-PKS) setting has attracted significant attention. Numerous cryptographic schemes based on RID-PKS settings have been proposed. However, under RID-PKS settings, no leakage-resilient signature or encryption scheme is proposed. In this article, we present the first leakage-resilient revocable ID-based signature (LR-RIBS) scheme with cloud revocation authority (CRA) under the continual leakage model. Also, a new adversary model of LR-RIBS schemes with CRA is defined. Under this new adversary model, security analysis is made to demonstrate that our LR-RIBS scheme with CRA is provably secure in the generic bilinear group (GBG) model. Finally, performance analysis is made to demonstrate that our scheme is suitable for mobile devices.

Leakage-Resilient Revocable Certificateless Encryption with an Outsourced Revocation Authority

“…In contrast, in the continual leakage model, adversaries may continually get leaked information of secret keys for each invocation of cryptographic scheme/protocol. Indeed, the continual leakage model is more accredited (Galindo and Virek, 2013;Wu et al, 2019Wu et al, , 2020Tseng et al, 2020;Hsieh et al, 2020;Tsai et al, 2021) and it consists of four properties as follows:…”

Fully Secure ID-Based Signature Scheme with Continuous Leakage Resilience

“…Galindo and Vivek [31] and Wu et al [32] give CLR signature schemes under the general bilinear group assumption. It is generally considered that the bilinear group model is weaker than the standard model.…”

“…References [18,19,32] construct continuous leakageresilient signature schemes, respectively. In these schemes, the relative leakage rate of the private key is very small.…”

“…In these schemes, the relative leakage rate of the private key is very small. Furthermore, reference [32] gives a continuous leakageresilient signature scheme that is based on the bilinear group model. It is generally considered that the bilinear group model is weaker than the standard model.…”

Fully Continuous Leakage-Resilient Certificate-Based Signcryption Scheme for Mobile Communications

“…To resist such leakage attacks, researchers offer leakage-resilient cryptography as a solution. In the past, numerous leakage-resilient signature (LRS) schemes (Galindo and Virek, 2013;Wu et al, 2019;Tseng et al, 2020;Wu et al, 2020b), leakage-resilient encryption (LRE) schemes (Kiltz and Pietrzak, 2010;Galindo et al, 2016;Wu et al, 2018Wu et al, , 2020aTseng et al, 2022), and leakage-resilient authenticated key agreement protocols (Tseng et al, 2021;Peng et al, 2021;Tsai et al, 2022) under various PKS settings have been published in the literature.…”