(19)
(11) EP 0 095 923 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.08.1985 Bulletin 1985/34

(43) Date of publication A2:
07.12.1983 Bulletin 1983/49

(21) Application number: 83303100

(22) Date of filing: 31.05.1983
(84) Designated Contracting States:
AT BE CH DE FR GB IT LI LU NL SE

(30) Priority: 02.06.1982 GB 8216137

(71) Applicant: THE PLESSEY COMPANY plc
 ()

(72) Inventor:
  • Austin, Kenneth
     ()

   


(54) Communications scrambling systems


(57) Scrambled communications signalling uses signals as transmitted and received that are coded by reorganisation of binary words representing original information signals. That reorganisation not only produces different sequences of blocks of binary words but also provides for variation of the lengths and numbers of such blocks (via memori M 100-M 115) within each reorganisation. In addition the blocks are read out in reverse order to their storage, and the preferred organisation is via a logic type pseudo random generator that must be synchronised and «seeded» at both transmitter and receiver prior to any transmission.






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