METHOD AND DEVICE FOR INFORMATION PROTECTION AGAINST UNAUTHORIZED ACCESS Russian patent published in 1999 - IPC

FIELD: computer engineering, information processing, in particular, personal units for information converting upon confidential communication between state, police, security, defense, industry and business parties. SUBSTANCE: information conversion method involves splitting input data file into alternating-length units and performing controlled ring shift of ASCII codes of each character in each unit. Corresponding device has interface unit, buffer memory unit, converting unit, control unit, and addressing unit. EFFECT: increased speed, minimal information losses, simplified design, decreased power consumption, increased reliability, possibility to perform both information encoding and information decoding. 2 cl