Secure one-way data transfer

Devices to provide one-way data transfer are known as one-way gateways and used in various security applications. The main problem to be solved by one-way gateways is to make secure communication between network segments with different security levels to maintain multilevel security policy. Although one-way gateways are utilized in lot of information systems, there is no solution, including `air gap', to assure one-way transfer in fact and they are not resistant against data leakage via covert channels. We analyzed state of the art technologies and products supporting one-way data transfer, worked out the requirements for one-way gateway with assured data transmitting. We designed the algorithm and protocol of assured data transfer and proposed the detailed device scheme. Then we build the program modelling the interaction between communication parties and the one-way gateway. This program was tested and some recommendations of its implementation were given.