Ukusatshalaliswa kokhiye we-Quantum (QKD) kuyindlela yokuxhumana ephephile esebenzisa iphrothokholi ye-cryptographic ehilela izingxenye ze-quantum mechanics. Ivumela amaqembu amabili ukuthi akhiqize ukhiye oyimfihlo ongahleliwe owabiwe owaziwa yiwo kuphela, ongasetshenziswa ukubethela nokuqaqa imiyalezo. Ngokuvamile ubizwa ngokungalungile ngokuthi i-quantum cryptography, njengoba kuyisibonelo esaziwa kakhulu somsebenzi we-quantum cryptographic.
Nakuba zitholakala kwezentengiselwano iminyaka eminingi, intuthuko iyaqhubeka ekwenzeni lezi zinhlelo zibe zincane, zishibhile, futhi zikwazi ukusebenza amabanga amade. Konke lokhu kubalulekile ekusetshenzisweni kwalezi zobuchwepheshe ohulumeni kanye nezimboni. Ukuhlanganiswa kwalezi zinhlelo ze-QKD engqalasizinda yenethiwekhi ekhona kuyinselele yamanje futhi amaqembu ahlukahlukene abakhiqizi bemishini yokuxhumana, abahlinzeki bengqalasizinda ebalulekile, abaqhubi benethiwekhi, abahlinzeki bemishini ye-QKD, ochwepheshe bezokuphepha kwedijithali kanye nososayensi, basebenza kulokhu.
I-QKD inikeza indlela yokusabalalisa nokwabelana ngezihluthulelo eziyimfihlo ezidingekayo kumaphrothokholi e-cryptographic. Ukubaluleka lapha ukuqinisekisa ukuthi zihlala ziyimfihlo, okungukuthi phakathi kwamaqembu axhumanayo. Ukuze senze lokhu, sithembele kulokho okwakubhekwa njengenkinga yezinhlelo ze-quantum; uma "uzibheka", noma uziphazamisa nganoma iyiphi indlela, "uphula" izici ze-quantum.