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Re: [iaik-jce] Data encryption questions ?



1. You would do something like:
    iaik.security.provider.IAIK.addAsProvider(true);
    KeyGenerator kg = KeyGenerator.getInstance("RC2");
    kg.init(40);
    Key key = kg.generateKey();
    Cipher cipher = Cipher.getInstance("RC2/ECB/PKCS5Padding");
    cipher.init(Cipher.ENCRYPT_MODE, key);

Note that CBC is usually to be prefered over ECB for block ciphers.

2. In order fastest to slowest they are: RC4, DES, RC2, TripleDES. Single
DES cannot be recommended due to the short keylength, RC2 is not too
fashionable either. TripleDES has the advantage that it is the best
studied cipher, but it is very slow compared to IDEA or even RC4. For
speed tests see also http://jcewww.iaik.at/jce/howfast.htm or execute
demo.TestSpeed.

Regards,

 Andreas Sterbenz              mailto:Andreas.Sterbenz@iaik.tu-graz.ac.at

-----Ursprüngliche Nachricht-----
Von: Gadre, Sachin <sgadre@kpmg.com>
An: <iaik-jce@iaik.tu-graz.ac.at>
Gesendet: Dienstag, 14. September 1999 18:01
Betreff: [iaik-jce] Data encryption questions ?


>
> All,
>
> 1. How to generate a RC2 40 bit key and use it with an RC2
> cipher having block mode as 'RC2/ECB/PKCS5Padding" using IAIk-JCE?
>
> 2. Out of the following :-  DES, Triple -DES, RC2, RC4 or any
> FIPS-140 complaint algorithm, which algorithm is the fastest for
> data encryption/decryption.
>
>
> Thanks,
>
> Sachin
>
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