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How do I choose constants suitable for Diffe-Hellman?

To: [email protected], [email protected]
To: [email protected], [email protected]
Subject: How do I choose constants suitable for Diffe-Hellman?
From: 0x7CF5048D@nowhere
Date: Fri, 2 Sep 1994 19:07:11 -0700
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How do I choose constants suitable for Diffe-Hellman?
According to _Applied Cryptography_ n should be prime,
also (n-1)/2 should also be prime. g should be a primitive 
root of unity mod n. n should be 512 or 1024 bits long.
Are there any other requirements?

How can I choose such numbers? Are such numbers published
anywhere?

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