On the Security of the Verifiably Encrypted Signature Scheme of Boneh, Gentry, Lynn and Shacham Revisited

抄録

At Eurocrypt'03, Boneh, Gentry, Lynn and Shacham proposed a pairing based verifiably encrypted signature scheme (the BGLS-VES scheme). In 2004, Hess mounted an efficient rogue-key attack on the BGLS-VES scheme in the plain public-key model. In this letter, we show that the BGLS-VES scheme is not secure in the proof of possession (POP) model.