Bellare, Mihir and Garay, Juan A. and Hauser, Ralf and Herzberg, Amir and Krawczyk, Hugo and Steiner, Michael and Tsudik, Gene and Herreweghen, Els Van and Waidner, Michael (2000):
Design, Implementation and Deployment of the iKP Secure Electronic Payment System.
In: IEEE Journal on Selected Areas in Communications, 18 (4), pp. 611--627. [Article]

Bellare, Mihir and Garay, Juan A. and Hauser, Ralf and Herzberg, Amir and Krawczyk, Hugo and Steiner, Michael and Tsudik, Gene and Waidner, Michael (1995):
iKP -- a family of secure electronic payment protocols.
In: Proc. First USENIX Workshop on Electronic Commerce, pp. 89--106,
[Conference or Workshop Item]