FIELD: electronic money transactions. SUBSTANCE: device has trusted agent of buyer, first money unit, trusted agent of seller, second money unit. Invention discloses operations of all of said systems. Systems for secure transmission of electronic cash have first electronic transaction device, which is protected against unauthorized access, and second electronic transaction device. EFFECT: increased security of remote operations for buying and selling electronic cash without special- purpose terminal. 21 cl, 45 dwg
