[curves] General Curve25519 and Ed25519 Libraries

Frank Wang frankw at mit.edu
Wed Jun 17 14:35:22 PDT 2015

Yes it does. It's called scalarmult compared to crypto_scalarmult, which is
for Curve25519. You can find the functions at the end of the paper:


On Wed, Jun 17, 2015 at 5:33 PM, Tony Arcieri <bascule at gmail.com> wrote:

> TweetNaCl has Ed25519 scalar multiplication? That's news to me...
> On Wed, Jun 17, 2015 at 2:16 PM, Frank Wang <frankw at mit.edu> wrote:
>> Hi,
>> I am working on a research project at MIT, and I need to use elliptic
>> curves (or a group where DDH is hard, but elliptic curves seem like the
>> best way to go) to implement a cryptographic scheme. I've been trying to
>> search for general Curve25519 and Ed25519 libraries where I can just do add
>> and scalar multiply as well as hash messages to points. The best library
>> I've come across so far is tweetnacl, which has the add and scalar multiply
>> operation for Ed25519, but it's a bit difficult to use, and I end up
>> modifying the library to do subtraction of points.
>> I have yet to find a good library that allows me to just do operations on
>> Ed25519 or Curve25519. Does such a library exist? If not, any tips on what
>> I should do? Should I just use another curve library that is better
>> supported? If so, any suggestions?
>> Thanks,
>> Frank
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> --
> Tony Arcieri
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