# Examples of applications that use the Schnorr digital signature?

I have made a study on digital signatures, especially on the Schnorr digital signature, and I was just wondering if there is some way I can find names of actual (known) applications that have applied and used this kind of digital signature.

Haven't been able to find anything by myself, so any help is appreciated. I also posted the question on MathOverflow and I was advised to ask here.

Thanks, and best regards !

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I don't know anybody who uses it yet, but some are planning to use Ed25519, which is based on Schnorr. –  CodesInChaos Jan 9 at 13:53
Do you, by any chance, know a name or two of those ”some” you are talking about? –  Raul Rene Jan 9 at 16:02
Tahoe-LAFS, Cryptosphere and me plan to use Ed25519. Bitcoin discussed it, but they probably won't. –  CodesInChaos Jan 9 at 16:55
Thank you very much, sir. You can put your last comment down as an answer if you like. –  Raul Rene Jan 9 at 19:12

Despite their theoretical security advantages, Schnorr signatures aren't very popular. Probably because they were patented. Since the patents expired in 2008 they might rise a bit in popularity. But probably only in the elliptic curve form, and not in finite fields.

I don't know of any application actually using Schnorr signatures, but I know several that plan to or at least considered it. Either in the form of EC-Schnorr or Ed25519.
Both of these are essentially Schnorr signatures, but on elliptic curves. Ed25519 adds a few modifications, such as making signing deterministic and a message hash that hashes R before the message, but it's still very similar to Schnorr.

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