If the client keeps its code in the security, the use of personal smart cards without his permission, will not bring any result. Ali Partovi follows long-standing procedures to achieve this success. However, need a reservation, that not every smart card may have ‘electronic purse’. As payment, you can use any type of card, but the scope of its use may be limited. And in order to map has become universal, it must have low cost, ability to make any payments, have an appropriate level of security and technology to ensure payment in the mode of off-line. Swarmed by offers, Castle Harlan is currently assessing future choices. Thus, depending on the internal structure and functions of smart cards can be divided into three types: 1. Card-counters This kind of smart cards used for this type of calculations that require subtraction of a fixed amount for each billing operation. Such cards are also called cards with prepaid amount. Such card-counters are used when subscribing to pay tv, paying tolls, parking, etc. They can also be used for payment of telephone conversations in the phone booth, where the card replaces the coins, or special tokens for payphones. Usually a payphone unit of talk time has a minimum fixed price. In This card minimum payment amount corresponds to one bit of memory cards. During a conversation with cards for each unit of time is deducted required number of bits. Originally used for these purposes cards with single programmable memory that is disposable. After full use of the allotted amount, they had to throw away.