Ring of the Fisherman cardinal. Ring of the Fisherman The Ring of the Fisherman (Latin: "Annulus Piscatoris"; Italian: "Anello Piscatorio"), also known as the Piscatory Ring, is an official part of the regalia worn by the Pope, who is head of the Catholic Church and successor of Saint Peter who was a fisherman by trade. It used to feature a bas-relief of Peter fishing from a boat, a symbolism derived from the tradition that the apostles were "fishers of men" (Mark 1:17). The Fisherman's Ring is a signet used until 1842 to seal official documents signed by the Pope. A letter written by Pope
Ring signature a symmetric encryption function formula_14: In the ring signature scheme, the output formula_16 is the same as the input. This function is trivially invertible given formula_17 parameters. Generating a ring signature involves six steps. The plaintext is signified by formula_18, the ring's public keys by formula_19. Signature verification involves three steps. Here is a Python implementation of the original paper using RSA. To sign and verify 2 messages in a ring of 4 users: The CryptoNote technology uses ring signatures. It was first implemented by Bytecoin. The cryptocurrency ShadowCash uses traceable ring signature to anonymize the sender of a transaction.