Time--memory trade-off (TMTO) cryptanalysis is a powerful technique for practically breaking a variety of security systems in reality.There are mainly four general TMTO cryptanalysis methods,namely Hellman table cryptanalysis,rainbow table cryptanalysis,thin rainbow table cryptanalysis and thick rainbow table cryptanalysis,plus a few supplementary techniques that can be combined with a general method to produce possibly distinct TMTOs,like distinguished points.In this talk,we present a unified TMTO cryptanalysis,which we call unified rainbow table cryptanalysis,basing it on a unified rainbow table,then we describe its general combination with distinguished points,and finally we apply unified rainbow table cryptanalysis to the A5/1 stream cipher being used in the Global System for Mobile Communications (GSM).On a general-purpose graphics processing unit (GPGPU) computer with 3 NVIDIA GeForce GTX690 cards that cost about 15,000 United States dollars in total,we made a unified rainbow table of 984GB in about 55 days,and implemented a unified rainbow table attack that had an online attack time of 9 seconds with a success probability of 34% (or 56%) when using 4 (respectively,8) known keystreams (of 114 bits long each).If two such tables of 984GB were generated.the attack would have an online attack time of 9 seconds with a success probability of 81% when using 8 known keystreams.The practical results show again that nowadays A5/1 is rather insecure in reality and GSM should no longer use it.