Message guaranty system

A method for communicating a message in a manner that will guaranty transfer of said message from a first workstation to a second workstation, said first and second workstations being connected to one another by a network, said method comprising the steps of:

• transmitting a first request signal from the first workstation to a first server, said first request signal requesting said first server to prepare a first type of evidence information for identifying said message;
• generating in the first server said first type of evidence information based at least in part on contents of said message;
• storing said first type of evidence information in said first server;
• transmitting said first type evidence information to a second server for storage therein;
• appending said first type of evidence information to said message;
• transmitting said message with said appended evidence information to a third server via said network;
• receiving in said third server a first received message containing evidence information, said third server storing the evidence information contained in the first received message in a memory and transmitting the evidence information contained in the first received message to said second server;
• comparing in said second server said first type of evidence information stored therein with the evidence information received from said third server;
• sending from said second server to the third server, if the evidence information contained in the first received message is determined to be equal to the first type of evidence information stored in said second server, data attesting that the message received by said third server is the message transmitted by said first workstation;
• preparing in said third server management information attesting that transmission of said message from the first workstation to the second workstation has been delegated to be under control of said third server;
• appending the management information to the message to which said first type of evidence information is appended to form a combined message;
• storing in said third server said management information;
• transmitting the combined message from the third server to the second workstation via said network;
• receiving in said second workstation a second received message containing evidence information and management information;
• sending the evidence information and management information in the second received message from the second workstation to said second server;
• comparing respectively in said second server the evidence information and management information in the second received message with the first type of evidence information and management information stored in said second server;
• and
• sending from the second server to the second workstation, if the evidence information and management information in the second received message are respectively determined to be equal to the first type of evidence information and management information stored in said second server, data attesting that said second received message is the message that was transmitted by said first workstation.