Traditional pen and paper transactions are becoming more and more replaced by equivalent electronic services. Therefore electronic e-mail should also provide enhanced services as those provided by traditional mail. In this paper we present new optimistic protocols for certified e-mail. The major contribution of our paper is the definition of a new property, specific to certified e-mail: no auth...

This paper distinguishes the three fundamental business design patterns: control, cooperation and autonomy. Today, most e-Business designs are not balanced, because they over-prioritize control. Balance is achieved when one basic pattern is the top priority, while the other two patterns are not ignored. The paper explains how to use these patterns to create one of three balanced e-Business desi...