Questions tagged [ed448]

In cryptography, Curve448 or Curve448-Goldilocks is an elliptic curve potentially offering 224 bits of security and designed for use with the elliptic-curve Diffie–Hellman (ECDH) key agreement scheme.

Filter by
Sorted by
Tagged with
1
vote
0answers
57 views

Why does EDDSA secret scaler pruning not prevent values >= prime L or zero?

I have been exploring and studying the EDDSA algorithm for curve 25519 and curve 448 in RFC 8032 (https://www.rfc-editor.org/rfc/rfc8032) as well as for curves 414 and 521 from this (https://eprint....
2
votes
1answer
103 views

Public key derivation for Ed448

Another potentially silly question here, but I seem to have developed tunnel vision and I am missing something very basic. In RFC 8032 one can find a number of test vectors for Ed488 - for example: <...
4
votes
3answers
192 views

Order of Edwards curve and its twist

In Mike Hamburg's Ed448-Goldilocks, a new elliptic curve (eprint 2015, WECCS 2015) it is studied untwisted Edwards curves in the prime field $\mathbb F_p$ $$E_d:\,y^2+x^2\,=\,1+d\,x^2\,y^2$$ with ...
1
vote
1answer
149 views

Performing EdDSA/Ed448 employing Montgomery ladder

EdDSA can be efficiently performed employing the Montgomery ladder. In order to implement this method, the base point should be converted to Mont. space, then the Mont. ladder should be executed, and ...
3
votes
1answer
285 views

What is "spinal-tap grade" security?

As stated here Ed448 is different from Ed25519 because of "spinal-tap grade" security. What does this mean?
17
votes
2answers
6k views

Elliptic curve ed25519 vs ed448 - Differences

Other than key size, What are some differences between the Elliptic curve ed25519 and ed448?