Concepts inUntraceable electronic mail, return addresses, and digital pseudonyms

Untraceable

Untraceable is a 2008 American thriller film starring Diane Lane, Colin Hanks, Billy Burke, and Joseph Cross. It was directed by Gregory Hoblit and distributed by Screen Gems. The film is a social commentary on Internet schadenfreude. Set in Portland, Oregon, the film involves a serial killer who rigs contraptions that kill his victims based on the number of hits received by a website ("www. killwithme. com") that features a live streaming video of the victim.  more from Wikipedia

Return address

In postal mail, a return address is an explicit inclusion of the address of the person sending the message. It provides the recipient (and sometimes authorized intermediaries) with a means to determine how to respond to the sender of the message if needed. The return address need not include a sender's name, but should include address or P.O. box details in the same way as the delivery address should.  more from Wikipedia

Pseudonym

A pseudonym is a name that a person or group assumes for a particular purpose, which differs from his or her original or true name (orthonym). Popular pseudonyms include stage names, noms de plume (pen names), aliases, gamer identifications, anagrams, Graecisms, Latinisations, mystifications, nicknames, and assumed names (and orders) of popes and monarchs.  more from Wikipedia