Strong (t, N) Key-insulated Blind Signature Scheme
Shangping Wang · Jisuanji gongcheng · 2005
Key exposure problem turns out to be very serious in security services. Key-insulated is way to address this issue. Basing on theprovable secure Okamoto-Schnorr blind signature scheme and key-insulated model, strong (t, N) key-insulated blind signature scheme is proposed,the scheme is stronger security than forward secure blind signature scheme. In the random oracle model, using forking lemma proposed byPointcheval and Stern, breaking of the scheme is equivalent to solve discrete logarithm problem.