Infinite Wishes vision workshop & Bali spa retreat 2009 Human Interactive Proofs: Second International Workshop, HIP 2005, Bethlehem, PA, USA, May 19-20, 2005, Proceedings (Lecture Notes in Computer Science / Security and Cryptology) $25.29 This book constitutes the refereed proceedings of the Second International Workshop on Human Interactive Proofs, HIP 2005, held in Bethlehem, PA, [...]