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Optical fibers need new security in the age of quantum computers

The entan­gled state gen­er­a­tor, which is being devel­oped at the Mil­i­tary Uni­ver­si­ty of Tech­nol­o­gy, is a Pol­ish con­tri­bu­tion to the work on a new, safe quan­tum com­mu­ni­ca­tion based on the phe­nom­e­non of pho­ton entan­gle­ment.

It will not be pos­si­ble to “eaves­drop” the infor­ma­tion trav­el­ing along the fiber optic cable with­out an imme­di­ate “set­back”.

Opti­cal fibers need new secu­ri­ty in the age of quan­tum com­put­ers.

The sci­en­tists are already work­ing on future forms of fast and secure data trans­fer.

Opto­elec­tron­ics and chemists from the Mil­i­tary Uni­ver­si­ty of Tech­nol­o­gy intend to secure the data flow in opti­cal fibers by build­ing a “entan­gled state gen­er­a­tor” and “nation­al quan­tum code key exchange mech­a­nism”. Quan­tum com­mu­ni­ca­tion will use light quan­ta that have a very spe­cial prop­er­ty — the state of entan­gle­ment. Entan­gle­ment caus­es each pair of pho­tons to behave iden­ti­cal­ly, regard­less of the dis­tance between them.

The secu­ri­ty of such trans­mis­sion, quan­tum com­mu­ni­ca­tion, is based on the fun­da­men­tal laws of physics.

It will be pos­si­ble to detect an attack on a telecom­mu­ni­ca­tions chan­nel with sim­ple opti­cal oper­a­tions.

This break­through tech­nolo­gies will allow to secure data exchange in opti­cal fibers, as well as stan­dard com­mu­ni­ca­tion that will be encrypt­ed with a quan­tum key. The one-time code will be a set of unique and ran­dom sequences of char­ac­ters.

 

Karoli­na Duszczyk
fot. Marek Życzkows­ki

Tłum. Anna Pęzioł