The omni-presence of the Internet in society today determined an explosive growth for online transactions. However, due to lack of security services such as data secrecy, authentication and integrity, Internet does not provide all the guarantees that a business communication tool should. In this context, protocols to facilitate secure and fair electronic exchange and certified electronic delive...

The Actor Model can be used as a framework for modeling, understanding, and reasoning about, a wide range of concurrent systems. For example:  Electronic mail (e-mail) can be modeled as an Actor system. Mail accounts are modeled as Actors and email addresses as Actor addresses.  Web Services can be modeled with endpoints modeled as Actor addresses.  Objects with locks (e.g. as in Java and C#...

Electronic mail is playing an important role for communication among Internet users. However, the value of electronic mail is being impaired by spam mails including unwanted commercial information, virus mails including malignant codes and many different forms of unnecessary information. Thus, it is urgent to develop a method of blocking spam mails fundamentally. The present study proposes a me...

Of my own situation I wrote: “In one day I typically receive 5-10 pieces of regular junk mail, 15-25 regular letters, 5 pieces of campus mail, 5 reports or documents (not all technical), 5-10 incoming phone calls, 10-20 local electronic messages, and 10-20 external electronic messages. Although many of these messages are discarded or forwarded to others for handling, much of my time is required...

With the advent of the Internet, use of electronic mail (email) for both personal comm unication and professional collaboration has continually increased. The use of email for communication will soon far exceed the use of the conventional mail, if it does not already. Email naturally lends itself to being archived because it is stored as a digital medium and as a result, many people have amasse...

We compare two statistical methods for identifying spam or junk electronic mail. Spam filters are classifiers which determine whether an email is junk or not. The proliferation of spam email has made electronic filtering vitally important. The magnitude of the problem is discussed. We examine the Naive Bayesian method in relation to the ‘Chi by degrees of Freedom’ approach, the latter used in t...