The occasion wherethe binary data of the picture and the like is attached to E-mail, content the character string (the text) in the data substitution one of the systems which are done.Inthe mail only the text data because it is not placed, binary file such as picture and soundand word processor document sending and receiving is not possible that way. Because of this, when transmitting following to fixed rule, it reached the point where the technique that is taken it substitutes the data in letter,afterthe receiving restoration (decoding) does in the original data. It is one Tsuga BASE64 of this substitution rule.WiththeE-mailon Internet, iBASE64.
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