In 2000, Shieh et al. proposed two novel multisignature schemes (a serial multisignature scheme and a parallel multisignature scheme) that are suitable for authenticating the delegated access, because of its efficiency of computation and communication, message recovery, and no pre-determination of signers and their signing order. However, this article will show that the two schemes are vulnerable to the forgery attacks.
All Science Journal Classification (ASJC) codes
- Automotive Engineering
- Aerospace Engineering
- Electrical and Electronic Engineering
- Applied Mathematics