Support - yEnc File Attachment Support
yEnc Encoding Reduces Download Time by 37%
When binary files are transmitted through
Usenet, they must be encoded into a set of printable characters that can be
part of messages. There are several methods for encoding these files into
characters. The most common method used is called UUencoding.
This method has been around for a long time, and 90+% of all files sent
through Usenet use UUencoding. UUencoding adds about 40% overhead to the
size of a posted file.
A second method is called Base64. This method of encoding is the
most common method for encoding binary files attached to e-mail messages,
but it is rarely used for Usenet messages. Base64 encoding adds about
37% overhead to the size of a posted file.
The third, and newest, method for encoding files is called "yEnc".
It was invented in 2001. The main advantage of yEnc encoding is that it
adds only about 3% overhead to encoded files. Because of this, yEnc encoded
file attachments download about 26% faster than UUencoded file attachments.
While UUencoding is still far more popular, yEnc is catching on
quickly in some binary newsgroups. Frequently, messages with yEnc encoded
attachments will have yEnc in their subject lines as a warning to people
using newsreaders that are unable to decode yEnc attachments. For
additional information about yEnc, see http://www.winews.net/yenc/index.htm
News Rover can encode and decode messages using UUencoding, Base64 or yEnc.
File decoding is fully automatic: just select a message to download, and
News Rover will recognize which type of encoding was used and perform the
appropriate decoding. You can select the type of encoding you wish to use
for files you post on the Configure/Usenet screen in News Rover.