Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: GSM inoshandisa nzira dzinoverengeka dzokuvhara nokuda kwokuchengeteka. The A5/1, A5/2, uye A5/3 nhepfenyuro ciphers anoshandiswa kuitira pamusoro-the-mhepo inzwi zvakavanzika. A5/1 ndiyo yakatanga kugadzirwa uye ndiyo yakasimba inoshandiswa muEurope neUnited States; A5/2 haina simba uye inoshandiswa mune dzimwe nyika. Kukundikana kwakakomba kwakawanikwa mune ese ari maviri algorithms: zvinokwanisika kutyora A5 / 2 munguva chaiyo ne ciphertext-chete kurwisa, uye muna Ndira 2007, Sarudzo yeHacker yakatanga chirongwa cheA5 / 1 chekupwanya nehurongwa hwekushandisa maFPGAs anotendera A5 / 1 kuti iputswe ne rainbow tafura kurwisa. Gadziriro yacho inotsigira algorithms dzakawanda kuitira kuti vashandisi vagone kutsiva cipher iyoyo neimwe yakasimba.  Mubvunzo: Ndeipi iri zita reimwe purogiramu umo vanovhiringidza vakawana utera hwakakomba?
A5/2