Security represent one of important aspect in the case of development and information transfer. Especially which have bases of network internet. Communications use the Internet is often done, and surely communications use the E-Mail (Electronic Letter). E-Mail often used as by a communications media with sending each other message of where the message can give the information which is the necessary for its consumer. Observation of Transaction of information transfer by that good unconcerned in partys cracker, hacker, and also naughty administrator, peeping out concept and method to pacify, how to information transfer passing network internet can be awaked by its authenticity without there change to information.

Security represent one of important aspect in the case of development and information transfer. Especially which have bases of network internet. Communications use the Internet is often done, and surely communications use the E-Mail (Electronic Letter). E-Mail often used as by a communications media with sending each other message of where the message can give the information which is the necessary for its consumer. Observation of Transaction of information transfer by that good unconcerned in partys cracker, hacker, and also naughty administrator, peeping out concept and method to pacify, how to information transfer passing network internet can be awaked by its authenticity without there change to information.

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