Form and procedure for selecting a code to be kept secret

Details Form and procedure for selecting a code to be kept secret Form and procedure for selecting a code to be kept secret

1991-02-22

1992-06-23

Pitts, Harold

Registers

Records

Particular code pattern

235487, 235495, G06K 1906

Patent

active

051245418

ABSTRACT:
The invention concerns a method and apparatus for selecting a code that has to be kept secret. The apparatus comprises a form having two separable parts, a symbol part and a selection part. The symbol part comprises a symbol area consisting of at least one symbol field made up of a plurality of symbols. Typically, there is a symbol field for each character or other symbol of the code to be selected. The selection part comprises a selection area corresponding to the symbol area, this selection area having a selection field corresponding to each symbol field. The selected symbols may be entered in clear text in the symbol fields, and an encoded version of the symbol is obtained by making an entry in the corresponding selection field position. The symbol part and the selection part each have the same identifier field, the symbols corresponding to the entries in the selection area being identifiable with the aid of the identifier in the identifier field.

REFERENCES:
patent: 4184148 (1980-01-01), Smagala-Romanoff
patent: 4445712 (1984-05-01), Smagla-Romanoff
patent: 4885459 (1989-12-01), Norsworthy

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