Modified ID-based cryptosystem using discrete logarithm problem

Id-Based Digital Multisignature Scheme

“…4 Tsujii et al have also proposed an identity-based cryptosystem based on the discrete logarithm problem, 5,6 and later, Laih and Lee modified the scheme. 7 In 1993, Harn and Yang proposed identity-based cryptographic schemes for user identification, digital signature, and key distribution. 8 Digital multisignature is a kind of digital signature that allows multiple signers to sign the same message separately and can combine all individual signatures into a multisignature without any data expansion.…”