Quantum cryptography in the family and at work
The European project SECOQC (41 scientists from 12 countries) presented a method for the technical implementation of quantum cryptography of communications, which by its practicality interested industry representatives.
Quantum cryptography is based on the Heisenberg uncertainty principle . According to the principle of uncertainty, the fact of measurement changes the measured value.
With quantum cryptography, communication participants receive identical codes / keys and an external attempt to select a code not only changes it, but also makes the fact of the attempt noticeable.
Until now, quantum cryptography on this principle was technically implemented only with a direct connection between the two participants. This time, scientists connected 6 participants who were in the vicinity of Vienna at a distance of 6 to 85 kilometers.
At the presentation of the method, a VoIP-telephone conversation was carried out using the so-called one-time-pad technology, in which the participants' keys are equal in size to the amount of encrypted information.
The representative of Siemens promised to begin the introduction of technology at the industrial level for 3-4 years to encrypt banking, business and military communications in closed networks. The cost of the encryption system at the moment - about 100,000 €. A commercial encryption system will cost about 10,000 €.
The main problems of implementation at the moment are low data transmission speed, the impossibility of data transmission over a distance of more than 100 km and the absence of an amplifier.
based on Spiegel
Quantum cryptography is based on the Heisenberg uncertainty principle . According to the principle of uncertainty, the fact of measurement changes the measured value.
With quantum cryptography, communication participants receive identical codes / keys and an external attempt to select a code not only changes it, but also makes the fact of the attempt noticeable.
Until now, quantum cryptography on this principle was technically implemented only with a direct connection between the two participants. This time, scientists connected 6 participants who were in the vicinity of Vienna at a distance of 6 to 85 kilometers.
At the presentation of the method, a VoIP-telephone conversation was carried out using the so-called one-time-pad technology, in which the participants' keys are equal in size to the amount of encrypted information.
The representative of Siemens promised to begin the introduction of technology at the industrial level for 3-4 years to encrypt banking, business and military communications in closed networks. The cost of the encryption system at the moment - about 100,000 €. A commercial encryption system will cost about 10,000 €.
The main problems of implementation at the moment are low data transmission speed, the impossibility of data transmission over a distance of more than 100 km and the absence of an amplifier.
based on Spiegel
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Source: https://habr.com/ru/post/41903/
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