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i-PIN (아이핀 or Internet Personal Identification Number) is a "commercial" alternative to the Resident Registration Number used in South Korea for on-line identification. Because of the increasing usage of Resident Registration Number for on-line services make it open for the rampant identity frauds and inefficiencies, it is a comprehensive new way for South Korean internet users to engage the web.

In July 2005, the guideline for i-PIN was established; in October 2006, i-PIN was put into trial; on July 2, 2009, it changed its official name to "i-PIN 2.0".


I-pin may refer to:

  • i-PIN, an internet registration system in South Korea
  • I-pin, a Wade-Giles romanization of Yibin city in southern China