International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 29 November 2013

Fei Tang, Hongda Li, Qihua Niu, and Bei Liang
ePrint Report ePrint Report
We extend the techniques of Kiltz et al. (in ASIACRYPT 2010) and Galindo et al. (in SAC 2012) to construct two efficient leakage-resilient signature schemes. Our schemes based on Boneh-Lynn-Shacham (BLS) short signature and Waters signature schemes, respectively. Both of them are more efficient than Galindo et al.\'s scheme, and can tolerate leakage of (1-o(1))/2 of the secret key at every signature invocation. The security of the proposed schemes are proved in the generic bilinear group model (additionally, in our first scheme which based on the BLS short signature, a random oracle is needed for the proof).

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