The method involves separating a message (m0) to be transmitted in submessages (t-p) through secret sharing, so that the submessages are required to reconstruct the message. The submessages are transmitted only at independently addressable computer systems for the operator over secure channels in different parties (MPu,MPv,MPw). Each independently addressable computer system for operator checks the submessage that come from a friend over a secure channel. An independent claim is included for a data transmission system for secure data transmission between a sender and a recipient.
