select indepentent generator with node js

[stef25761]

Hey,

I need to select two independent generators from the curve.
How can I select them? If I use the generator function from ecp I always get the same points.
I this maybe e bug or i miss an initialisation?

This is the code i used.

let g = ctx.ECP.generator(); const g_Bytes = []; g.toBytes(g_Bytes, true);

For the second one i used:

let u = ctx.ECP.generator(); const u_Bytes = []; u.toBytes(u_Bytes, true);

[mcarrickscott]

No, that won't work. Typically elliptic curves come with a standard generator as part of their specification. So ECP.generator() always returns that same point. To create two independent generators use ECP.map2point(). DIg into BenchtestALL>html for some example code, e.g. var rw1=ctx.FP.rand(rng); G1=ctx.ECP.map2point(rw1); var rw2=ctx.FP.rand(rng); G2=ctx.ECP.map2point(rw2); Now G1 and G2 are independent generators. Mike

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On Wed, Mar 16, 2022 at 3:20 PM stef25761 ***@***.***> wrote: Hey, I need to select two independent generators from the curve. How can I select them? If I use the generator function from ecp I always get the same points. I this maybe e bug or i miss an initialisation? This is the code i used. let g = ctx.ECP.generator(); const g_Bytes = []; g.toBytes(g_Bytes, true); For the second one i used: let u = ctx.ECP.generator(); const u_Bytes = []; u.toBytes(u_Bytes, true); — Reply to this email directly, view it on GitHub <#61>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAU3ZDVKQYWQ4BJUTRFTI3LVAG7Y5ANCNFSM5Q3RW2RQ> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>