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A binary-to-text encoding is encoding of data in plain text.More precisely, it is an encoding of binary data in a sequence of printable characters.These encodings are necessary for transmission of data when the communication channel does not allow binary data (such as email or NNTP) or is not 8-bit clean.
Base64 is also widely used for sending e-mail attachments, because SMTP – in its original form – was designed to transport 7-bit ASCII characters only. Encoding an attachment as Base64 before sending, and then decoding when received, assures older SMTP servers will not interfere with the attachment.
More common today is the Base64 format, which is based on the same concept of alphanumeric-only as opposed to ASCII 32–95. All three formats use 6 bits (64 different characters) to represent their input data. Base64 can also be generated by the uuencode program and is similar in format, except for the actual character translation:
Quoted-Printable, or QP encoding, is a binary-to-text encoding system using printable ASCII characters (alphanumeric and the equals sign =) to transmit 8-bit data over a 7-bit data path or, generally, over a medium which is not 8-bit clean.
The software is scriptable using a language similar to ANSI C. Originally created in 2003 by Graeme Sweet, 010 Editor was designed to fix problems in large multibeam bathymetry datasets used in ocean visualization. The software was designed around the idea of Binary Templates. A text editor was added in 2008.
In these cases, the header field is actually redundant for the email client to decode the message body, but it may still be useful as an indicator of what type of object is being sent. Values ' quoted-printable ' and ' base64 ' tell the email client that a binary-to-text encoding scheme was used and that appropriate initial decoding is ...
Ascii85, also called Base85, is a form of binary-to-text encoding developed by Paul E. Rutter for the btoa utility. By using five ASCII characters to represent four bytes of binary data (making the encoded size 1 ⁄ 4 larger than the original, assuming eight bits per ASCII character), it is more efficient than uuencode or Base64, which use four characters to represent three bytes of data (1 ...
In this function they are often dedicated to the public domain with their source code as public domain software. Examples are the first CERN's httpd, [1] Serpent cipher, base64 variants, [2] and SHA-3. [3] The Openwall Project maintains a list of several algorithms with their reference source code in the public domain. [4]