Abstract
We offer two very transparent digital signature schemes: one using non-square matrices and the other using scrap automorphisms. The former can be easily converted to a public key encryption scheme.
Mathematical Subject Classification:
Acknowledgments
We are grateful to Sasha Ushakov for useful discussions, in particular for pointing out the forgery attack in Section 7.1.
Disclosure statement
No potential conflict of interest was reported by the author(s).