2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/32327This paper proposes a signature scheme where the signatures are generated by the cooperation of a number of people from a given group of senders and the signatures are verified by a certain number of people from the group of recipients. Shamir's threshold scheme and Schnorr's signature scheme are used to realize the proposed scheme.10 PagesCryptography and SecurityK.6.M.,K.6.5,G.1.0,E.3,D.4.6text