java archive (~.zip)
This is a copy of Voon-Li Chung's privyCryptApplet.html from
Use right mouseclick to COPY or PASTE text into the applet interface.
If the right mouseclick does not work, you can try Ctrl+C and Ctrl+V
to delete the "Encryption code" when you are finished using the applet.
About privyCrypt the Java Applet
The privyCrypt Java applet was a logical extension to the privyCrypt
series of free encryption utilities, which are currently available for
Win32, UNIX command-line and PalmOS. The privyCrypt series was written
by Voon-Li Chung (firstname.lastname@example.org) mainly as
a small programming skills demonstration.
Note that the applet is downloaded from the site you visited,
but it runs completely locally - no connection to the internet is made
to decrypt / encrypt your message. It has been designed so that it will
operate properly on screens as low res as 640x480.
More information about privyCrypt is available from http://www.cs.uwa.edu.au/~vlchung/code/privyCrypt/
The code for the Blowfish encryption algorithm is a port of
Eric Young's sample C implementation to Java. You are more than welcome
to this copy of the privyCrypt applet; however, if you have a
website of your own somewhere, I'd prefer it if you put a local copy of
it somewhere in case something happens to my web area (one of the most
annoying things I have come across is every link in existance to a
piece of software I was looking for points to the same site, which is
Using privyCrypt the Java Applet
Encrypting the message is simple - enter your message in the big text
area provided (either by typing or cut and pasting). Enter the
encryption code into the text field directly adjacent to the buttons at
the bottom, then press "Encrypt". The message will be encrypted, which
can then be cut and pasted as-is into your favourite program.
Decrypting is just as simple - cut and paste the entire message (you
don't have to search through and pick out the encrypted bit -
privyCrypt automatically screens out the bit it is interested in),
enter the encryption code into the same text field as for encryption,
and press "Decrypt".
To clear the text window, press "Clear". Also note this
doesn't clear the encryption code, so make sure you clear it if
privyCrypt is running on a public access terminal.
[entry 20070505 by carpediem2100] >>>
<<<. I discovered on some browsers,
privycrypt java applet will not decrypt properly. Here is the
workaround. Prime the applet first by encrypting some
plaintext. After this is completed, the applet should decrypt
properly. Give me an email if this isn't clear. [end of entry]
About the error messages
Normally a privyCrypt encrypted message starts with:
"Hi, this is privycrypt. BINSIZE ALIGNSIZE"
Where BINSIZE and ALIGNSIZE
are numbers. This allows you to lazily cut and paste the entire message
into privyCrypt's window without having to work out where the encrypted
area starts and finishes. In this case, privyCrypt couldn't find the
"Hi, this is privycrypt."
Normally a privyCrypt encrypted message ends with:
As with the STARTTAG, this allows you to lazily cut and paste
the entire message into privyCrypt's window without having to work out
where the encrypted area starts and finishes. In this case, privyCrypt
couldn't find the string
Code too short / long
encryption algorithm requires at least 16-bits of encryption
code (that's 4 characters) and a maximum of 448 (that's 56 characters).
As such, privyCrypt's encryption codes (the secret word) must also fall
within this range. Remember, for every extra character in your
encryption code, you decrease the odds of someone guessing your code by
Error: binsize / alignsize
One of the two numbers mentioned in "No STARTTAG" is missing or in the
Error: Corrupted Data
This means something really bad happened while trying to decrypt the
message. This usually means that part of the message is missing or one
of the 2 numbers on the first line is wrong.