Two Notes On The Security Of Certificateless Signatures
Rafael de Castro, Ricardo Dahab · Scopus · 2007
We discuss two common pitfalls found in proofs of security of various certificateless signature (CLS) schemes. As a result of the first observation, we are able to show that a CLS scheme ([Goy06]), previously thought to be secure, is vulnerable to a key replacement attack. We then proceed to define a class of CLS schemes whose security is provable by standard techniques, leading to a more efficient version of a known CLS scheme ([ARP03]) and a (previously unknown) security proof for another ([LCS05]).