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FIELD: computer equipment. Method comprises steps of: receiving a limited-use key LUK from a remote computer; generating, using a communication device, a transaction cryptogram using LUK; sending a denotation to the access device instead of a real account identifier and a transaction cryptogram for conducting the transaction; sending to the remote computer a recharge request for the new LUK; and receiving a new LUK from the remote computer when the transaction log information in the recharge request matches the transaction log information on the remote computer. EFFECT: technical result consists in improvement of protection of communication device during transaction. For example, a portable communication device can be placed near an access device, such as a point of sale POS terminal, for transferring account information from a portable communication device to an access device for conducting a transaction. To provide a secure operating environment for securely storing account information on a portable communication device, a security element is used, such as a Subscriber Identity Module SIM card, a specialized integrated circuit embedded in a portable communication device, or a specialized component provided as a secondary market solution. During a transaction, the security element communicates directly with the contactless interface for example, near field proximity communication transceiver NFC of a portable communication device for transmitting payment data to a contactless reader of the access device.
51.3. Протокол потоковой репликации
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Effective date : The present invention relates to the field of data processing, in particular to systems for syntactic processing of a text data stream used in telecommunications, and is intended for processing messages transmitted both between subscribers and between subscribers and information systems and can be used in a2p, p2a, p2p, A2a services. In data processing tasks, the question almost always arises of sequentially updating results as new data arrives on the fly.