Lithursday
From Encyclopedia Dramatica
Lithursday is the main source of lulz for /b/tards on a Thursday. Unlike Caturday, posting anything on Lithursday wont turn you into a Furfag, but it will reduce your standing to that of a Basement-dweller.
Lithursday consists of posting pictures of books that people have found interesting or useful. However it always degenerates into either manga discussions or becomes heavily trolled by /b/tards. Fight Club is posted every thread without fail.
Some times people post unfunny or shooped pictures on Lithursday. Doing so is strictly forbidden, as Lithursday is serious business
Some argue that Lithursday should be replaced with ZonDay, after the Lulzy Events of 7/26.
History
Lithursday was created At least 100 years ago, on the 4chan /b/ board. Due to the age of the board, many Old memes can often be found, including but not limited to Cockmongler
Since those early days, Lithursay has become a day to be remembered for great information on Anal Techniques.
Current situation
Books used to be uploaded as jpg-rars (rars hidden in jpg-files), but due to mootfaggotry this is no longer possible. In an attempt to circumvent this rage-invoking change, anon made a file binder specifically for 4chan usage. Long live lithursday. lol blocked
As in the case of 4chan.js, moot's jpg-rar filter is easy to circumvent, since he isn't scanning the whole file, only the first and last 64 KB. All you generally need to do to get around it is add padding after the image (using several copies of the image will do) to push the beginning of the RAR file past the 64 KB threshold. See instructions in the image below.
If or when moot fixes his filter, a number of fallbacks are available:
- Alter the magic number in the RAR file, for example by replacing "Rar!" with "Bar!". Use a hex editor to do this so you don't make other unintentional changes to the file.
- Concatenate the image and file without compressing the file. Since the file isn't an archive, it most likely won't be blocked. Upon receiving such an image, it's possible to extract the original file using a hex editor. Alternatively, those of you not versed in Computer Science III may want to try this Greasemonkey script, which can detect the added data in images on 4chan and split the image back up into its original pieces. Also useful for telling fake jpeg-rar books from real ones. Do not use this technique to upload source code or HTML files as this may trigger the anti-4chan.js filter and get you banned.
- The 4chan Gold File Embedder offers similar functionality to the now-blocked pFBind, but will be harder for moot to block because it uses an LSB-based steganography scheme to attach files, rather than appending them after the end of the image. Also includes a web interface designed for 4chan which you can use by connecting to a proxy on localhost. The original source code of the program is included; you can examine it by downloading the file and either renaming it to .zip or opening it in your favorite archiver. Requires Java 5.0.
- Google will find you all sorts of other steganography utilities, some of them much harder to block. One of the better ones is steghide. The downside is that the hardest-to-block steganography tools typically require you to use a cover image at least 5-20 times the size of the hidden file. This can run you up against 4chan's file size limit.
