Abstract: An information encrypting transmission and reception method in an information transmission and reception network composed of a plurality of senders and receivers having computers being connected and communicating each other via a web network and a data center having a server computer for receiving electronic key data of bit data formed by the senders and receivers and personal data such as address corresponding to each electronic key data to register the serer computer and certifying the senders and the receivers with each personal data.

Abstract: A sender server computer 5 for transmitting and receiving data of a sender 5 and a receiver server computer 6 for transmitting and receiving data of a receiver 4 that are connected to the web network; firstly encrypting bit data FD of original information such as plaintext to be transmitted from the sender 3 to the receiver 4 by performing an exclusive OR operation in use of bit data of electronic key of the sender 3 and transmitting the firstly encrypted bit data CR1 attached with personal data of the receiver 4 to the sender server computer 5; by the sender server computer 5, receiving bit data CS of the electronic key of the receiver 4 by submitting personal data of the receiver 4 to the data center 2, secondly encrypting the firstly encrypted bit data CR1 by performing exclusive OR operation in use of received bit data CS of the electronic key of the receiver 4, and transmitting the secondly encrypted bit data CR2 attached with personal data of the sender 3 and the receiver 4 to the receiver server comput

Abstract: A method and system for testing a mobile communication system which includes a base station radio unit for making a line connection with an arbitrary one of a plurality of mobile stations, a line control unit which is coupled to the base station radio unit, and a pseudo mobile station which is coupled to the line control unit via a monitoring control line.

Abstract: A pattern recognition processing system in which variations in a character, pattern or the like, especially in a handwritten one, are suppressed to extract its invariable characteristics, ensuring accurate recognition of the character, pattern or the like. The pattern to be recognized is divided into circumscribed quadrangular areas and scanned in horizontal and vertical directions to extract reflection segments between the vertical frames of the circumscribed quadrangular areas and particular segments between adjacent ones of pattern strokes. Further, endpoints of these reflection and particular segments are checked in directions across the scanning directions to extract those endpoints which are not blocked by the pattern strokes, and the corresponding positions of the co-ordinates of these endpoints on a figure frame in the directions across the scanning directions are encoded to extract characteristics of contours of the pattern to be recognized.