ascii-zip
A deflate compressor that emits compressed data that is in the [A-Za-z0-9] ASCII byte range.
Example
$ echo 'Hello ASCII world!' >hello
$ ./compress.py --mode raw --output ./hello.infalted ./hello >/dev/null
$ cat ./hello.infalted
D0Up0IZUnnnnnnnnnnnnnnnnnnnUU5nnnnnn3SUUnUUUwCiudIbEAtwwwEt333
G0GDGGDtGptw0GwDDDGtDGDt33333www03333sDdFPsgWWwackSKKaowOWGQ4Why?
It can be used for bypassing certain filters in certain applications :)
This algorithm is at the heart of the Rosetta Flash vulnerability. For additional information, see