Please what is RTEncode and where can I get it?

RTEncoder is a commercial program that is free for decoding, but you have to buy a license to encode.  However, there is a totally free Java version:
http://www.geocities.ws/RTEJava/beta/

It's similar to Objaction Mover, but it doesn't involve a difference file, but encrypts the entire file (which can be an entire zip archive) against a key file.

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