Abstract: Format-preserving encryption and decryption processes are provided. The encryption and decryption processes may use a block cipher. A string that is to be encrypted or decrypted may be converted to a unique binary value. The block cipher may operate on the binary value. If the output of the block cipher that is produced is not representative of a string that is in the same format as the original string, the block cipher may be applied again. The block cipher may be repeatedly applied in this way during format-preserving encryption operations and during format-preserving decryption operations until a format-compliant output is produced. Selective access may be provided to portions of a string that have been encrypted using format-preserving encryption.

Abstract: A system and method is provided that displays different symbols on an input device corresponding to different input device layouts. On a keyboard type input device, each key on the keyboard has an individually controllable display device which displays one or more symbols in a given symbol set. Software detects which keyboard layout should be used, downloads the keyboard layout over a network, such as the Internet, and causes the display device in each key to display the appropriate symbol or symbols. A virtual machine embedded in the keyboard provides a platform independent execution enviromnent and simplifies the development of different types of input device layouts. This unique arrangement obviates the need for purchasing different keyboards and software to accommodate the different character sets used by different languages or different specialized software applications.

Abstract: A keyboard has a plurality of key operated switches, each including a key having a manually engagable key surface. The keyboard selectively determines the function produced by operation of the key operated switches, and displays on each key its current function. The display provides a sensible output indication corresponding to the current function of each key, and includes an elongate strip symbol bearing member located alongside each key and lying in a plane generally perpendicular to the plane of each key surface.

Abstract: Several different symbols may be assigned to each key of the keyboard as requested by the operator. All the various symbols of the keys are recorded in a memory where they are organized in a certain number of pre-defined, distinct configurations of the keyboard. The configuration chosen by the operator is recorded in a display memory and displayed by means of a graphic unit on a flat panel, for example a liquid crystal display panel. The key actuated by the operator is identified by a decoding circuit to determine its symbol by means of the display memory and to display it on the flat panel.

Abstract: A printer employing a daisy wheel or other print wheel uses a single motor both to translate a carriage along a line of printing and to rotate the daisy wheel. The daisy wheel is rotated through one complete character set for movement of the carriage along the print line by one character printing space. Type on the fingers of the daisy wheel is progressively displaced relative to a center line through the ordered set to be printed early on the line of printing by a distance which is a proportional part of one print line letter space, the displacement proportional to the position of a character in the set between a first character and a last character.Also disclosed is a controller for the printer, the controller including enciphering capabilities whereby enciphered text is produced.

Abstract: 8.

Abstract: 1.

Abstract: 2.

Abstract: 3. A ciphering unit, comprising a plurality of variable random circuits, a lurality of juxtaposed like mechanisms to change said circuits, each said mechanism being conditionable for operation or non-operation, means to condition each said mechanism for operation or for non-operation, each said conditioning means including a member having two functioning positions, a plurality of rectangular bails mounted one inside the other for rocking movement about a common horizontal axis, means in each said mechanism to rock a respective said bail, and adjustable means carried by each said bail to operate a respective said member whereby to condition for operation a mechanism that is conditioned for non-operation at the time such member is operated.

Abstract: 1.