FIELD: communication.
SUBSTANCE: invention relates to the field of communication, namely to data exchange. A client masking coefficient and a client masked public key form a key pair based on an elliptic curve, so that the client masked public key can be used for decryption of data that is encrypted using the client masking coefficient, and the client masked public key can be used for confirmation the authenticity of a signature generated by signing data by means of the client masking coefficient.
EFFECT: increase in the security of data exchange.
21 cl, 11 dwg, 1 tbl
