User:Okar~enwiki

Okar, okarokar were the nicknames used by a recreational hacker in the mid 1990s. Apparently based on Central America, has allegedly exploited security flaws on credit card validation systems over the internet with basic understanding of the Luhn algorithm and basic hacking utilities. Also known to exploit security flaws on internet telephony companies and adult entertainment websites.

Early credit card hacking
In the mid 1990s, the relatively low security of the credit card system provided many opportunities for fraud. Okar began exploiting poor security credit card validation websites with basic Luhn algorithm knowledge, and other hacking utilities. Okar acted through numerous proxy servers, and carried out complicated credit card fraud schemes involving national banks primarily in non-developed countries. Allegedly had in possession more than 500 valid credit cards from a national bank in Central America in the mid 1990s.

Other hacking activities
Major internet telephony companies providing international call services were also targeted by Okar. However Okar only caused minor economical loses to companies; and instead, alerted them of the security flaws. Also fashioned the use of trojans to break into personal computers through the internet. Okar also constantly broke into adult entertainment websites and distributed website passwords through the Internet Relay Chat (IRC), causing him to be blacklisted in most adult websites. Okar was never formally interrogated or charged with crime or misdemeanour by any authority of any country. Only official record of a charge against Okar was filed in the United States by a major adult entertainment website operator and an international telephone company.