DE618826C - Device for encrypting and decrypting messages - Google Patents

Description

Device for encrypting and decrypting messages Die The invention relates to a device for encrypting and decrypting messages.

There are already encryption devices known in which in one Frame ei = larger number of mutually adjustable columns are arranged, each of which contains an alphabet and which crosses all columns of the Key is set and the secret word is readable. With such devices it is also already known that the letters on endless belts guided over rollers to arrange.

The invention consists in that to increase the encryption security each of the adjustable character carriers for the key has another 'above it slidable tape is assigned, on which also an alphabet in reverse Order and also a window to make one letter visible of the underlying character carrier is provided.

In the drawing, the subject matter of the invention is shown schematically.

The encryption device is made of a plate a, which is grooved to accommodate the adjustable key holder b, which are designed as straps, is provided. On the left and right side of the Plattaa there is a fixed one Complete alphabet, etscale c arranged in the same order (sequence of letters). The letters A to Z are in the same order on the key holder b as indicated on the fixed scales. f are two guided in the platbea Rollers over which adjustable belts (reading belts) d run. each of the reading tapes has a window e. In addition to this window, there is an alphabet on each of the ribbons in the reverse order as indicated on the other scales, starting with Above the window e with A. g is the reading edge, below that the key. is set.

If a message is to be encrypted, the key adjusted by adjusting the carrier b. In the exemplary embodiment is as a key "Free course for the capable" chosen. The plaintext letter to be encrypted is on the fixed scale attached to the left or right. c visited and the movable band d moved down until its window e and the Plain letters are in the same amount. The cipher letter is then in the window e and the plain letters are visible above the reading indicator. Should, for example, »Without Diligence no price ”is coded, then volume d in the first column becomes so far moved until its reading window is at the same height as or next to the letter O of the stationary Scale lies. In the window is the letter R and above the reading edge is the Letter O visible. The adjustable belt of the second column - becomes accordingly with its window shifted to the level of the letter H on the fixed scale, so ° that the letter M appears in the window and H above the reading edge. In the windows is the encrypted text and above the reading bezel the plain text visible. When deciphering, the procedure is reversed, namely the windows of the adjustable bands d are set so that the encrypted text appears in them.

The ribbons and scales can of course be placed next to the letters A to Z still contain digits and other characters; The only thing that matters is the arrangement is made so that the order on the fixed scales and the key holders is the same and reversed on the reading tapes.

Claims (1)

Claim to the patent: Device for enciphering and deciphering messages with a large number of mutually adjustable columns, each of which contains an alphabet and in which the key or the key words are set across all columns and the secret word can be read and in which the letters are endless Ribbons are arranged and guided over rollers, characterized in that each of the adjustable character carriers (b) has a. above it is assigned a displaceable band (d) which, in addition to a window (e) for making the letters of the lower character carriers (b) visible, also has an alphabet in the reverse order as on the other character carriers.