Classiication of Blind Signature Schemes and Examples of Hidden and Weak Blind Signatures Classiication of Blind Signature Schemes and Examples of Hidden and Weak Blind Signatures

Limited distribution notes: This report has been issued as a Research Report for early dissemination of its contents. In view of the transfer of copyright to the outside publisher its distribution outside the University of Technology Chemnitz-Zwickau prior to publication should be limited to peer communications and speciic requests. After outside publication, requests should be lled only by reprints or legally obtained copies of the article. Abstract We introduce four classes of blind signatures: the hidden, the weak blind, the interactive blind and the strong blind signatures. Then we give examples of hidden ElGamal-signatures and weak blind signature schemes with message recovery which were developed from the ideas of Nyberg and Rueppel's signature scheme.