The advent of intelligent transportation system has a crucial impact on the traffic safety and
efficiency. To cope with security issues such as spoofing attack and forgery attack, many …

In this paper, we suggest solutions to the key exposure problem in ring signature. In
particular, we propose the first forward secure ring signature scheme and the first key …

Standard identity-based (ID-based) signature schemes typically rely on the assumption that
secret keys are kept perfectly secure. However, with more and more cryptographic primitives …

Private key exposure can be the most devastating attack on cryptographic schemes; as such
exposure leads to the breakage of security of the scheme as a whole. In the real world …

With more and more cryptosystems being deployed on insecure environments such as
mobile devices, key exposures appear to be unavoidable. This is perhaps the most …

Abstract Public Key Cryptosystem (PKC) completely relies under the assumption that user's
private key is absolutely secure. Exposure of private key may lead to disastrous situations in …

In this paper, we apply the parallel key-insulation mechanism to identity-based encryption
(IBE) scenarios, and minimize the damage caused by key-exposure in IBE systems. We first …

We extend Hanaoka et al.'s parallel key-insulated mechanism to identity-based signature
scenarios, and propose an identity-based parallel key-insulated signature scheme. The …

In proxy signature schemes, the proxy signer B is permitted to produce a signature on behalf
of the original signer A. However, exposure of proxy signing keys can be the most …

Traditional identity-based signature (IBS) schemes typically rely on the assumption that
secret keys are kept perfectly secure. However, with more and more cryptographic primitives …