SPAM Created by Dubovay Szilvia

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SPAMCreated by Dubovay Szilvia
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SPAM

• Spam is the abuse of electronic messaging systems
  (including most broadcast media, digital delivery
  systems) to send unsolicited bulk messages
  indiscriminately. While the most widely
  recognized form of spam is email spam, the term
  is applied to similar abuses in other media
  instant messaging spam, Usenet newsgroup spam,
  Web search engine spam, spam in blogs,wiki spam,
  online classified ads spam, mobile phone
  messaging spam, Internet forum spam, junk fax
  transmissions, social networking spam, and file
  sharing network spam.

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SPAM

• Spamming remains economically viable because
  advertisers have no operating costs beyond the
  management of their mailing lists, and it is
  difficult to hold senders accountable for their
  mass mailings. Because the barrier to entry is so
  low, spammers are numerous, and the volume of
  unsolicited mail has become very high. The costs,
  such as lost productivity, are borne by the
  public and by Internet service providers, which
  have been forced to add extra capacity to cope
  with the deluge. Spamming is widely reviled, and
  has been the subject of legislation in many
  jurisdictions.

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E-mail spam

• E-mail spam, also known as junk e-mail, is a
  subset of spam that involves nearly identical
  messages sent to numerous recipients by e-mail. A
  common synonym for spam is unsolicited bulk
  e-mail (UBE). Definitions of spam usually include
  the aspects that email is unsolicited and sent in
  bulk. "UCE" refers specifically to unsolicited
  commercial e-mail.
• E-mail spam has steadily, even exponentially
  grown since the early 1990s to several billion
  messages a day. The total volume of spam (over
  100 billion emails per day as of April 2008) has
  leveled off slightly in recent years, and is no
  longer growing exponentially.
• Spammers collect e-mail addresses from chatrooms,
  websites, customer lists, newsgroups, and viruses
  which harvest users' address books, and are sold
  to other spammers. Much of spam is sent to
  invalid e-mail addresses. Spam averages 78 of
  all e-mail sent.

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General costs of spam

• Cost is the combination of
• Overhead The costs and overhead of electronic
  spamming include bandwidth, developing or
  acquiring an email/wiki/blog spam tool, taking
  over or acquiring a host/zombie, etc.
• Transaction cost The cost of contacting each
  additional recipient once a method of spamming is
  constructed, multiplied by the number of
  recipients.
• Risks Chance and severity of legal and/or public
  reactions, including damages
• Damage Impact on the community and/or
  communication channels being spammed (see
  Newsgroup spam)

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In crime

• Spam can be used to spread computer viruses,
  trojan horses or other malicious software. The
  objective may be identity theft, or worse (e.g.,
  advance fee fraud). Some spam attempts to
  capitalize on human greed whilst other attempts
  to use the victims' inexperience with computer
  technology to trick them.

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Other types of spams

• Instant Messaging Spam
• Newsgroup spam and forum spam
• Mobile phone spam
• Online game messaging spam
• Spam targeting search engines
• Spam targeting real time search engines
• Blog, wiki, and guestbook spam
• Spam targeting video sharing sites

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How to Protect Against Spam

• 1. Install spam filtering/blocking software  2.
  Do not respond to suspicious emails  3. Set up a
  disposable email address  4. Create an email
  name that's tough to crack  5. View emails in
  plain text  6. Create a spam filter for your
  email  7. Do not post links to email addresses
  on web sites  8. Watch out for those checked
  boxes  9. Report spam