JavaScrypt: Source Distribution
Downloading and Installing
The JavaScrypt source distribution contains everything you
need to install JavaScrypt on your own computer. To install
a local copy of JavaScrypt which you can use even when not
connected to the Web, start by downloading the source
This is a Zipped archive; copy it into the newly created
directory (folder) where you wish to install JavaScrypt,
then extract the contents with an
Once the files are extracted you may then, if you wish, delete
Running Your Local Copy of JavaScrypt
JavaScrypt works precisely the same whether installed on your
local computer or accessed over the Web. The only difference
is that you use a "file:" URL to direct
your browser to the local directory containing JavaScrypt
rather than an "http:" URL pointing to
a Web site. If you use a Unix (Linux, etc.) machine,
and you've installed JavaScrypt in a directory named,
say, "/home/boris/utils/JavaScrypt", you'd
launch the JavaScrypt home page with the URL:
A Windows user who had installed JavaScrypt in a directory
named "C:\natasha\myprogs\JavaScrypt" would use a
Note that when using a "file:" URL you must
specify the index.html home page file name: if omitted,
you'll see a directory listing, not the home page an
"http:" URL would default to.
From the home page, you can navigate to the other pages
just as if you were connected to the Web. You may wish to
add bookmarks to the local "file:" URL so
you don't have to type it in every time you wish to run
Contents of the Source Distribution
Files included in the source distribution are as follows.
Files with names in grey type
are development tools, test programs, documentation, and
other ancillaries which are not part of the user
- Advanced Encryption Standard (AES) implementation.
- Pseudorandom number generator based on AES
- Page which permits testing aesprng.js by generating
pseudorandom sequences suitable for evaluation with
- Utilities to "armour" binary data as various
forms of ASCII text, and to "disarm" (decode)
such text into the original binary.
- This file.
- Tools for "entropy collection", which monitor
events (time and date, mouse motion, key presses)
etc. to create a difficult-to-guess seed for
pseudorandom sequence generation.
- JavaScrypt tutorial.
- JavaScrypt home page.
- Encryption/Decryption page.
- "Lean" version of the Encryption/Decryption page.
This version is created from javascrypt.html
references, removing explanatory text, and compressing
- Pseudorandom number generator based on L'Ecuyer's
modular algorithm with a Bays-Durham shuffle. Used
for non-security-related pseudorandom sequence generation.
- Development log.
- Pass Phrase Generator page.
- Dictionary for Steganography page (stego.html).
The dictionary is compressed by sorting words by length
and concatenating into strings of equal length with no
delimiters between words.
- Steganography page.
- Utilities for encoding and decoding
strings in the
byte stream representation.
- Dictionary of words used by the Pass Phrase Generator
(pass_phrase.html). The dictionary is
compressed by sorting words by length and concatenating
into strings of equal length with no delimiters between
words. The dictionary differs from that in
stegodict.js in excluding words longer than 8
by John Walker
This document is in the public domain.