Lub tuam txhab Quantum Communications tsim encryption key faib tshuab. Lawv lub ntsiab feature yog lub impossibility ntawm "wiretapping".
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Vim li cas quantum networks raug siv?
Cov ntaub ntawv raug suav tias muaj kev tiv thaiv yog tias nws lub sijhawm decryption tseem ceeb tshaj nws "hnub tas sijhawm." Niaj hnub no, nws yog qhov nyuaj los ua kom tiav cov xwm txheej no - qhov no yog vim kev txhim kho ntawm supercomputers. Tsuas yog ob peb xyoos dhau los, ib pawg ntawm 80 Pentium 4-based computers "mastered" () 1024-ntsis RSA encryption hauv 104 teev xwb.
Nyob rau hauv lub supercomputer, lub sij hawm no yuav luv luv, tab sis ib tug ntawm cov kev daws rau qhov teeb meem yuav yog ib tug "muaj zog cipher kiag li," lub tswv yim uas tau hais los ntawm Shannon. Hauv cov txheej txheem zoo li no, cov yuam sij raug tsim rau txhua cov lus, uas ua rau muaj kev pheej hmoo ntawm kev cuam tshuam.
Ntawm no, hom kev sib txuas lus tshiab yuav los cawm - quantum tes hauj lwm uas xa cov ntaub ntawv (cov yuam sij crypto txiaj) siv ib qho photons. Thaum sim cuam tshuam lub teeb liab, cov photons no raug rhuav tshem, uas ua rau pom kev nkag mus rau hauv cov channel. Xws li cov ntaub ntawv sib kis tau raug tsim los ntawm kev lag luam me me ntawm ITMO University - Quantum Communications. Ntawm lub taub hau yog Arthur Gleim, tus thawj coj ntawm Quantum Information Laboratory, thiab Sergei Kozlov, tus thawj coj ntawm International Institute of Photonics thiab Optoinformatics.
Kev siv tshuab ua haujlwm li cas
Nws yog nyob ntawm txoj kev sib txuas lus quantum ntawm sab frequencies. Nws peculiarity yog tias ib qho photons tsis raug tso tawm ncaj qha los ntawm qhov chaw. Lawv raug coj mus rau sab frequencies raws li theem ntawm kev hloov pauv ntawm classical pulses. Lub caij nyoog nruab nrab ntawm cov cab kuj thiab cov zaus zaus yog kwv yees li 10-20 teev tsaus ntuj. Txoj hauv kev no tso cai rau koj tshaj tawm cov teeb liab quantum tshaj 200 meters ntawm qhov ceev ntawm 400 Mbit / s.
Nws ua haujlwm raws li hauv qab no: lub laser tshwj xeeb tsim cov mem tes nrog lub wavelength ntawm 1550 nm thiab xa mus rau electro-optical theem modulator. Tom qab kev hloov kho, ob sab zaus tshwm sim uas txawv ntawm cov cab kuj los ntawm tus nqi ntawm cov xov tooj cua modulating.
Tom ntej no, siv cov theem hloov, lub teeb liab yog me ntsis-los-ntsis encoded thiab xa mus rau sab txais. Thaum nws mus txog lub receiver, lub spectral lim rho tawm cov teeb liab sideband (siv lub photon detector), re-phase modulates, thiab decrypts cov ntaub ntawv.
Cov ntaub ntawv xav tau los tsim kom muaj kev sib txuas ruaj ntseg yog sib pauv ntawm qhov qhib channel. Tus yuam sij "raws" yog tsim ib txhij nyob rau hauv lub transmitting thiab txais modules. Tus nqi yuam kev yog xam rau nws, uas qhia tau hais tias seb puas muaj kev sim xaim lub network. Yog tias txhua yam yog nyob rau hauv kev txiav txim, ces cov kev ua yuam kev raug kho, thiab ib tug zais cryptographic yuam sij yog generated nyob rau hauv lub transmitting thiab txais modules.
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Dab tsi tseem yuav ua
Txawm hais tias qhov theoretical "unhackability" ntawm quantum networks, lawv tseem tsis tau muab kev tiv thaiv cryptographic kiag li. Cov khoom siv muaj kev cuam tshuam rau kev nyab xeeb. Ob peb xyoos dhau los, ib pawg kws tshaj lij los ntawm University of Waterloo tau tshawb pom qhov tsis zoo uas tuaj yeem tso cai rau cov ntaub ntawv cuam tshuam hauv quantum network. Nws tau txuam nrog qhov ua tau ntawm "dig muag" lub photodetector. Yog tias koj ci lub teeb ci ntawm lub teeb pom kev, nws dhau los ua saturated thiab tsis tso npe photons. Tom qab ntawd, los ntawm kev hloov qhov siv ntawm lub teeb, koj tuaj yeem tswj lub sensor thiab dag lub zog.
Txhawm rau daws qhov teeb meem no, cov hauv paus ntsiab lus ntawm kev ua haujlwm ntawm cov neeg txais yuav tsum tau hloov pauv. Muaj ib lub tswv yim rau cov cuab yeej tiv thaiv uas tsis hnov ββββtsw rau kev tawm tsam ntawm cov cuab yeej ntes - cov cuab yeej no tsuas yog tsis suav nrog hauv nws. Tab sis cov kev daws teeb meem no nce tus nqi ntawm kev siv quantum systems thiab tseem tsis tau dhau mus dhau qhov kev sim.
βPeb pab neeg tseem tab tom ua haujlwm hauv cov lus qhia no. Peb koom tes nrog cov kws tshaj lij Canadian thiab lwm pab pawg neeg txawv tebchaws thiab Lavxias. Yog tias peb tswj kom kaw qhov tsis zoo ntawm qib kho vajtse, tom qab ntawd quantum networks yuav dhau mus thiab yuav dhau los ua qhov chaw sim rau kev sim cov thev naus laus zis tshiab, "Arthur Gleim hais.
Pom zoo
Ntau thiab ntau lub tuam txhab hauv tsev tau qhia txog kev txaus siab rau kev daws teeb meem quantum. Tsuas yog Quantum Communications LLC muab cov neeg siv khoom nrog tsib cov ntaub ntawv sib kis txhua xyoo. Ib txheej ntawm cov cuab yeej, nyob ntawm qhov ntau (los ntawm 10 mus rau 200 km), raug nqi 10-12 lab rubles. Tus nqi yog piv rau txawv teb chaws analogues nrog ntau me ntsis kev ua tau zoo tsis.
Xyoo no, Quantum Communications tau txais kev nqis peev ntawm ib puas lab rubles. Cov nyiaj no yuav pab lub tuam txhab nqa cov khoom lag luam thoob ntiaj teb. Ib txhia ntawm lawv yuav mus rau txoj kev loj hlob ntawm peb-tog tej yaam num. Hauv particular, kev tsim cov quantum tswj tshuab rau cov chaw faib cov ntaub ntawv. Pab neeg no tso siab rau cov tshuab modular uas tuaj yeem ua ke rau hauv IT infrastructure uas twb muaj lawm.
Quantum cov ntaub ntawv kis tau tus mob yuav dhau los ua lub hauv paus ntawm hom tshiab ntawm cov txheej txheem yav tom ntej. SDN tes hauj lwm yuav tshwm sim uas siv quantum tseem ceeb faib tshuab ua ke nrog ib txwm encryption los tiv thaiv cov ntaub ntawv.
Kev ua lej cryptography yuav siv txuas ntxiv los tiv thaiv cov ntaub ntawv nrog lub sijhawm txwv tsis pub lwm tus paub, thiab quantum txoj kev yuav pom lawv cov niche hauv thaj chaw uas yuav tsum muaj kev tiv thaiv cov ntaub ntawv muaj zog dua.
Hauv peb qhov blog ntawm Habre:
Tau qhov twg los: www.hab.com