Blind signatures are a cryptographic tool that is well suited to enable privacy protecting e-commerce applications. In cryptographic frameworks however, only the major cryptographic tools like digital signatures and ciphers are provided as abstract ...

Comparison-shopping brokers can create value to transactions between consumers and vendors by aggregating services and product information that were traditionally offered by separate vendors, thus reducing search costs and contributing for efficiency on ...

In this paper, we present a new data-warehousing-based approach to recommender systems. In particular, we propose to extend traditional two-dimensional user/item recommender systems to support multiple dimensions, as well as comprehensive profiling and ...