Knowledge Base
Elliptic-Curve Parameter
A

ssc-256

Summary

Name:
ssc-256
Long Name:
MIRACL Standard Secure Curve (256-bit)
Key size:
256 bits
Publishers:

Check your host!

Type a URL to analyze a service

Get a prompt and clear overview of your security configuration. Right now!

Security

A+
Key Size
Security

The elliptic-curve cryptography[118][119][120][121] is an approach to public-key cryptography[164][165][166] based on the elliptic curve[116][117]s. The most important property in terms of encryption strength, beyond the designer is elliptic curve key size[292][293][294]. All the key sizes available are considered secure, so there is no consideration about it.

A+
Trusted Design
Security

The elliptic-curve cryptography[118][119][120][121] is an approach to public-key cryptography[164][165][166] based on the elliptic curve[116][117]s. Note that there is controversy[287][288][289][290][291] around some of the National Institute of Standards and Technology[470][471] designed elliptic curveselliptic curves designed by NIST[285][286]. This elliptic curve designed by independent researcher[284] Daniel J. Bernstein[476][477] and there is no evidence for any compromise.

Recommendations

Add at least one elliptic curve to the list of elliptic curves supported by your server designed by independent researchers and prefer them as server configuration makes it possible.

A
Post-Quantum
Security

The elliptic curve[116][117] cryptography provides no protection against a cryptanalytic attack by a quantum computer, and no classical elliptic curve does — just as classical Diffie-Hellman does not — because a quantum computer breaks the hardness assumption they rely on. Only a hybrid key exchange (a classical algorithm combined with a post-quantum cryptography[158][159] one) or a pure post-quantum algorithm is quantum-safe.

Recommendations

Enable a hybrid key exchange or a pure post-quantum algorithm on your server, and prefer it where the configuration allows, so the connection stays secure against a future quantum computer.

Parameter Numbers

Prime (p)
0xc90fdaa22168c234c4c6628b80dc1cd129024e088a67cc74020bbea63b139c0b
Copy to clipboard
Coefficient (a)
0xc90fdaa22168c234c4c6628b80dc1cd129024e088a67cc74020bbea63b139c08
Copy to clipboard
Coefficient (b)
0xadf85458a2bb4a9aafdc5620273d3cf1d8b9c583ce2d3695a9e13641146434e1
Copy to clipboard
Generator (x)
0x1
Copy to clipboard
Generator (y)
0x5266efdf704821eeeae4345e7126dfab8ddf93dfd61de1886eb7254bb80d57e5
Copy to clipboard
Order (n)
0xc90fdaa22168c234c4c6628b80dc1cd0fbec42e940b37a88d9caeca198a64437
Copy to clipboard
Cofactor (h)
0x1
Copy to clipboard

Representations

PEM

-----BEGIN EC PARAMETERS-----
MIHgAgEBMCwGByqGSM49AQECIQDJD9qiIWjCNMTGYouA3BzRKQJOCIpnzHQCC76m
OxOcCzBEBCDJD9qiIWjCNMTGYouA3BzRKQJOCIpnzHQCC76mOxOcCAQgrfhUWKK7
Spqv3FYgJz088di5xYPOLTaVqeE2QRRkNOEEQQQAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAVJm799wSCHu6uQ0XnEm36uN35Pf1h3hiG63JUu4DVflAiEA
yQ/aoiFowjTExmKLgNwc0PvsQulAs3qI2crsoZimRDcCAQE=
-----END EC PARAMETERS-----
Download ecparam.pem
Copy to clipboard

PARI/GP

p = 0xc90fdaa22168c234c4c6628b80dc1cd129024e088a67cc74020bbea63b139c0b;
a = 0xc90fdaa22168c234c4c6628b80dc1cd129024e088a67cc74020bbea63b139c08;
b = 0xadf85458a2bb4a9aafdc5620273d3cf1d8b9c583ce2d3695a9e13641146434e1;
E = ellinit([a, b], p);
G = [0x1, 0x5266efdf704821eeeae4345e7126dfab8ddf93dfd61de1886eb7254bb80d57e5];
n = 0xc90fdaa22168c234c4c6628b80dc1cd0fbec42e940b37a88d9caeca198a64437;
h = 0x1;
Copy to clipboard

LaTeX

$\begin{aligned}
y^2 &\equiv x^3 + a x + b \pmod{p} \\
p &= 0xc90fdaa22168c234c4c6628b80dc1cd129024e088a67cc74020bbea63b139c0b \\
a &= 0xc90fdaa22168c234c4c6628b80dc1cd129024e088a67cc74020bbea63b139c08 \\
b &= 0xadf85458a2bb4a9aafdc5620273d3cf1d8b9c583ce2d3695a9e13641146434e1 \\
G &= (0x1, 0x5266efdf704821eeeae4345e7126dfab8ddf93dfd61de1886eb7254bb80d57e5) \\
n &= 0xc90fdaa22168c234c4c6628b80dc1cd0fbec42e940b37a88d9caeca198a64437 \\
h &= 0x1
\end{aligned}$
Copy to clipboard