Spam Overview Essay Example | Topics and Well Written Essays - 2250 words

Spam Overview - Essay ExampleSpammers be not abe to prevent intermediary systems from adding these headers while the headers provide only when stripped protection because a thorough examination of the Received header will be required to identify the real source of the message. There argon two popular techniques used by e-mailmers to puzzle message recipients using open relay sites (Yahoo Anti-Spam Resource Center, 2004) to send messages and adding Received headers of their own creation when move a message. Open relay sites refer to servers that are generally allowed to be used by unknown computers in order to to send e-mail messages. arms crowd out be traced back to these relays, but it is unlikely that the relay operator will be able to identify the system that passed it the message. While servers that allow relaying are becoming less common as a result of the email problem, they still exist and are well-known by spammers. These relay sites are a good deal blacklisted, mean ing that certain ISPs will not accept messages from them. While this is helpful, it has the effect of blocking not only spam, but also legitimate messages by new(prenominal) senders that may depend on the relay for mail transport. The second technique is the adding of bogus Received headers. However, this technique is not so effective as the get-go one. The bogus headers usually contain errors, but are not able to prevent the addition of accurate Received headers. This means that recipient can confide the header that the own server added (jupiter.solar.net in the example) and work back from one header to the next, identifying whether the server is one he trusts at each step. (Klensin, 1995) The message id can be utilized to authenticate the validity with the administrator at each intermediary. Ultimately, the false headers can... The problem of spam has grown intensively since the emergence of the Internet. During the period of 2001-2002, spam increased by 450 percent or 12.4 bil lion messages per day. Spam is considered to be highly challenging problem because it mostly contains pornographic advertisement or fraudulent, get-rich-quick schemes move from a cautiously disguised source. Spam is also a computer security risk since it spreads computer viruses that then turn infected computers into spammers. The sending of spam results in a substantial shifting of costs from advertisers to ISPs and e-mail recipients. In 2003, spam is counted to have cost companies worldwide $20.5 billion. Spammers are able to send messages for minimal cost--the cost of their Internet access and mailing lists. The costs of relaying messages, storing them, and downloading them are borne by others. The extent of other forms of commercial advertising that occurs is limited by the cost of the advertising.