Wednesday, October 6, 2010

Captcha: Advantages and Disadvantages

Captcha is a way to differentiate between an automated computer program and a human. It is a box with distorted text that must be deciphered in order to enter free email services, online polls, and to complete online purchases.

Advantages:
  • Distinguishes between a human and a machine
  • Makes online polls more legitimate
  • Reduces spam and viruses
  • Makes online shopping safer
  • Diminishes abuse of free email account services
Disadvantages:
  • Sometimes very difficult to read
  • Are not compatible with users with disablilities
  • Time-consuming to decipher
  • Technical difficulties with certain internet browsers
  • May greatly enhance Artificial Intelligence