Здравствуйте, Eugeny__, Вы писали:

DOO>>Что такое "сама Visa"?
E__>+

Коллеги, вас что в Гугле забанили? Один из партнеров Visa потерял около миллиона номеров кредитных кард:

Global Payments, the U.S.-based credit card processor company that experienced a security breach affecting plastic issued from Visa and MasterCard, today confirmed that the breached portion of its processing system was confined to North America. The company also finally revealed how many credit card numbers were stolen: less than 1,500,000.

http://www.zdnet.com/blog/security/up-to-15-million-visa-mastercard-credit-card-numbers-stolen/11249