Efficient Generic Construction of Forward-Secure Identity-Based Signature

The security of traditional identity-based signatures wholly depends on the security of secret keys. Exposure of secret keys requires reissuing all previously assigned signatures. This limitation becomes more obvious today as key exposure is more common ...

Forward-secure signatures are proposed to diminish the damage of key exposure, in which the security of signatures prior to the period of key exposure can be kept. Identity-based signatures can reduce the complexity and the cost for managing the public ...

In traditional identity-based encryption schemes, security will be entirely lost once secret keys are exposed. However, with more and more use of mobile and unprotected devices, key exposure seems unavoidable. To deal with this problem, we newly propose ...