An efficient covert channel
Sattar J. Aboud, Mohammed A. AL-Fayoumi · 2006
Abstract:- The signature algorithm with a broadband covert channel that does not want the sender to compromise the security of the entity signing key is the Elgamal signature algorithm. But contrary to the common idea, the design of the digital signature scheme does not maximize the covert uses of its signatures, but minimizes them. The suggested scheme illustrates that several discrete logarithm schemes are vulnerable, since they are used in more than one group concurrently, and the key data may reveal by these groups which discrete logarithm are facile, but the digital signature scheme is more secure in this means.