# Is there a SHA1PRNG standard?

*From*: "Mark" <webmaster@xxxxxxxxxxxx>*Date*: 21 Apr 2006 08:57:29 -0700

The java.security.SecureRandom class can be used to get an instance of

SHA1PRNG. It appears that SecureRandom generates different values from

JDK 1.4.1 to 1.4.2. We have an implementation which is dependent on

the JDK 1.4.1 implementation of SecureRandom and would like to ensure

that future versions will also be compatible. Where can we get a copy

of the standard that was used for the 1.4.1 SecureRandom

implementation? We would like to write our own class to get a SHA1PRNG

instance using such a standard.

For example if we use a seed to initialize the SecureRandom class, we

would like to be able to reuse that seed to regenerate the same PRN to

recover the same plaintext for backward compatibility.

Thanks in advance...

-- Mark

.

**Follow-Ups**:**Re: Is there a SHA1PRNG standard?***From:*David Wagner

**Re: Is there a SHA1PRNG standard?***From:*clark

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