New Technique to Generate Pseudo Random Crypto Keys

We are building a pseudo random crypto keys generator which depends on sequence of linear shift feedback register (LSR), some of them are choden randomly on each run (system operating) so we get a new cryptosystem at each run. four LSR are chosen and so have new 16 linear shift register in all systems on each run that are chosen from 32 shift registers existing in a (bank) sequences of linear shift regiter. the system passed all standerds statistical testsand the results where very closed to standerd states.