# BigInteger Security Problems!

Omar Ba_rukab (omar@yacht.ee.fit.edu)
Wed, 14 Oct 1998 15:58:08 -0400

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Dear Sir;
I have the following questions for you:

Q1 : When I used the message digest algorith (MD5 of the 128 bits)
to get a message digest for a file or message then when I get the raw
byte data of the message digest and change it to character format
using the Base64 encoder in the java.misc.Base64encoder to have
the output in a readable form I get confused because when you divide
128 bits by 6 I got 21.33 which may mean 21 or 22 characters base on the
Base64 format. I did this in java. When I run my program I got the
message digest of 24 characters and also I got the two characters (==) at
the end of the message digest such example as : r1Er6kbaMQEJxRnzN581HA==

2- In the DES what kind of characters substitution is used when we
used the session keys to encrypt data.

3- Also is the RSA is available with sun provider to use or not. If
so please give me the site or URL to try it. Thank you

omar@ee.fit.edu

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