DJB's work is good and commendable. I personally think that EdDSA (and ECDSA, for that matter) are not covered by Certicom's patents.

But IANAL (I Am Not A Lawyer)... I *can* understand vendors who would hold until either an explicit IPR release is posted, or the (potentially!) relevant patents expire.

On 9/1/15 15:23 , Tony Arcieri wrote:
On Tue, Sep 1, 2015 at 12:17 PM, Blumenthal, Uri -- 0553 -- MITLL <u...@ll.mit.edu <mailto:u...@ll.mit.edu>> wrote:

    I am not tracking patents - have neither time, nor interest in
    doing that. But I'm not releasing commercial software. I think
    somebody made a list of the patents owned by Certicom, but I can't
    recall the details. That would be the first thing to look at, IMHO.


Dan Bernstein has made lists of ECC patents here:

http://cr.yp.to/ecdh/patents.html
http://ed25519.cr.yp.to/software.html (see "Patents" at the bottom of the page)

According to him, no extant patents should apply to the CFRG curves or EdDSA (and it's seeming highly likely that the CFRG signature algorithm will greatly resemble or be EdDSA)

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