Design And Research Of E-Mail System Security

With ceaseless development of the whole society informatization,E-Mail is becoming more and more important in people′s work。But the general purpose E-Mail system doesn't fully consider the problem of the security,there are some extrusive problems:First is posing as an authorized user and sending E-Mail;The second is legal user′s E-Mails be intercepted and restored that leads to blow the gaff;the third is user denies the E-Mail that he ever sent out。Aiming at the hidden trouble in the E-Mail system and discussing the army network′s abstract,and the demand of network′s communication relationships,this article put forward its own model of arm network′s security E-Mail system and detail project devise,including the devise of protocol,CA(Certificate Authority),security E-Mail system terminal,realize the communication between CA and the user terminal that complete the system management functions。After succeeding authentication CA carries through safety accredit, Moreover it includes relevant user certificate,below the indispensability situation,system can safely updates,discharges,keeps in the archives user′s information。Moreover,CA can act as security E-Mail terminal receive and send data messages。Security E-Mail terminal acts as the common terminal,finishes the daily management and receives or sends the data concerting with CA,and it receives and sends the message with the other common terminals。This model use binding method of public key system and traditional symmetry key system,settle the problems of E-Mail system in arm′s network,such as identify,integrity,secrecy,undeniable etc。Attain the request of arm′s secrecy communications。This E-Mail system needn′t the expert hardware,greatly reduce the communication cost,afford high quality low price security service for the army。...