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The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...
Sending two or more messages with the same key is an insecure process. To a cryptanalyst the messages are then said to be "in depth." [34] [35] This may be detected by the messages having the same indicator by which the sending operator informs the receiving operator about the key generator initial settings for the message. [36]
The Motorola ARC4 DMRA should by design provide at least 4 billion different IVs, so there should be 4 billion superframes with a different IV (2^32-bits possible IVs). But one user discovered that Motorola uses a non-primitive LFSR for the ARC4 to generate the IVs. The generator used x^32 + x^4 + x^2 + 1 is non-primitive and generates short ...