An algorithm to discover any change with the messages or documents which is sent with the internet.

Abstract

This research introduce new algorithm to discover any change in the sender message. This
algorithm is programmed with visual Basic language. This algorithm is building from
inputing message by the sender to find key or (password) for encoding the sender
information , which is append to the original message and will be represents the message
digital signature. the algorithm of key will be search to find symbols that represents middle of any word
,this symbols will be concatenation to produced key in Ascii codes , which sum to produced
key number that is added to each Ascii code from the sender information, as result ,every
symbol is converted to Ascii code to produced new code append with message. the receiver
will be produced key with the same algorithm above, then using it to decode message
signature , by using the reverse algorithm of encoding , if this document or message is right,
so the user information is read to know him .otherwise, the receiver will not decode this
information so ,may be this document or message changed.