
encoding
Encoding is a technique for expressing values in a specific notation (e.g.,
binary, ASCII, etc.). Encoding is also a method of translating
files in one format into another format for electronic transmission.
Encoding is used to add security, ease transfer over gateways, or
simplify complex communications.
URLs:
- RFC 1522
- MIME (Multipurpose Internet Mail Extensions) Part Two:
Message Header Extensions for Non-ASCII Text
- Syntax
- Overview concerning the syntax of encoded words
- Windows encoder
- Article concerning using the Windows encoder
W3E References:
- UUEncoding
- - a method of translating
a file of any type into a pure ASCII text file.
- UUDecoding
- - the process of returning
a UUEncoded file to it's original state.
- Security Encoding
- - a process or method
of scrambling and unscrambling a message or file to protect its
contents during electronic transfer.
- Encryption
- - a method of security encoding.
Detail:
The encoding process represents 24-bit groups as output strings of four
encoded characters. Moving from left to right, a 24-bit input group is
formed by concatenating (linking together or connecting) three 8-bit
input groups. The 24 bits are then treated as 4 connected 6-bit groups,
each translated into a single digit in the base 64 alphabet. When you
encode a bit stream via base 64 encoding, the bit stream must be assumed
to be ordered with the most significant bit first; i. e., the first bit
in the stream will be a high order bit in the first bite, the 8th will
be the low-order bit in the first byte, and so on.

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Copyright 1996 Charles River Media. All rights reserved.
Text - Copyright © 1995, 1996 - James Michael Stewart & Ed Tittel.
Web Layout - Copyright © 1995, 1996 - LANWrights &
IMPACT Online.
Revised -- February 20th, 1996