Re: Diffie Hellman + AES (Rjindael) Patent/Licensing?

From: Michael Amling (nospam@nospam.com)
Date: 02/20/03 

From: Michael Amling <nospam@nospam.com>
Date: Thu, 20 Feb 2003 18:27:03 GMT

harlequin wrote:
>
> Rijndael, as an AES candidate, was required to state a guarantee that it
> would be royalty-free.

   As a condition of entry, each cipher's submitter agreed to make it
royalty free if selected as the AES. Rijndael was made royalty-free by
its inventors regardless of the outcome of the AES competition (which
made it an early favorite with me!).

> The Diffie-Hellman patent expired (I believe) in September 2000. If I
> understand correctly, then this must also be freely available.

   I think that was RSA that expired in September, 2000. DH was even older.

--Mike Amling

Relevant Pages

  • Re: Diffie Hellman + AES (Rjindael) Patent/Licensing?
    ... > Rijndael, as an AES candidate, was required to state a guarantee that it ... > would be royalty-free. ... A patent, however, has a set of claims that defines what it covers. ... who designed AES weren't aware of the patent at all at the time. ...
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  • Re: Enigma machine strenght using a computer
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    ... The following patch adds an i586 optimized implementation of AES aka ... +// - Minor portability cleanups and speed optimizations ... +// An AES (Rijndael) implementation for the Pentium. ... +// AES Key Schedule Subroutine ...
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  • Re: Advanced Encryption Standard Implementation for Pocket PC?
    ... > AES in CryptoAPI only ships with WinXP +. ... you can find a few libraries out there that use the AES ... > encryption cipher used in AES is Rijndael). ... so it has no ties to the CryptoAPI either. ...
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