CAFE ("Conditional Access for Europe") is an ongoing project in the European Community's ESPRIT program. The goal of CAFE is to develop innovative systems for condit...
Jean-Paul Boly, Antoon Bosselaers, Ronald Cramer, ...
We introduce the k-payment problem: given a total budget of N units, the problem is to represent this budget as a set of coins, so that any k exact payments of total value at most ...
In an electronic cash (e-cash) system, Recoverability means once you have lost your e-cash, you still can get back the amount of e-cash that you have lost. Untraceability means no ...
One-way hash functions are an important tool in achieving authentication and data integrity. The aim of this paper is to propose a novel one-way hash function based on cellular aut...
Alice wants to prove that she is young enough to borrow money from her bank, without revealing her age. She therefore needs a tool for proving that a committed number lies in a spe...