Knowledge Base
Elliptic-Curve Parameter
A

c2pnb368w1

Summary

Name:
c2pnb368w1
Long Name:
c2pnb368w1 elliptic curve (binary field GF(2^368))
Key size:
368 bits
Object identifier:
1.2.840.10045.3.0.19
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

Coefficient (a)
0xe0d2ee25095206f5e2a4f9ed229f1f256e79a0e2b455970d8d0d865bd94778c576d62f0ab7519ccd2a1a906ae30d
Copy to clipboard
Coefficient (b)
0xfc1217d4320a90452c760a58edcd30c8dd069b3c34453837a34ed50cb54917e1c2112d84d164f444f8f74786046a
Copy to clipboard
Generator (x)
0x1085e2755381dccce3c1557afa10c2f0c0c2825646c5b34a394cbcfa8bc16b22e7e789e927be216f02e1fb136a5f
Copy to clipboard
Generator (y)
0x7b3eb1bddcba62d5d8b2059b525797fc73822c59059c623a45ff3843cee8f87cd1855adaa81e2a0750b80fda2310
Copy to clipboard
Order (n)
0x10090512da9af72b08349d98a5dd4c7b0532eca51ce03e2d10f3b7ac579bd87e909ae40a6f131e9cfce5bd967
Copy to clipboard
Cofactor (h)
0xff70
Copy to clipboard

Representations

PEM

-----BEGIN EC PARAMETERS-----
BggqhkjOPQMAEw==
-----END EC PARAMETERS-----
Download ecparam.pem
Copy to clipboard

PARI/GP

m = 368;
\\ reduction polynomial: z^368 + z^85 + z^2 + z^1 + 1
a = 0xe0d2ee25095206f5e2a4f9ed229f1f256e79a0e2b455970d8d0d865bd94778c576d62f0ab7519ccd2a1a906ae30d;
b = 0xfc1217d4320a90452c760a58edcd30c8dd069b3c34453837a34ed50cb54917e1c2112d84d164f444f8f74786046a;
\\ curve: y^2 + x*y = x^3 + a*x^2 + b over GF(2^m)
G = [0x1085e2755381dccce3c1557afa10c2f0c0c2825646c5b34a394cbcfa8bc16b22e7e789e927be216f02e1fb136a5f, 0x7b3eb1bddcba62d5d8b2059b525797fc73822c59059c623a45ff3843cee8f87cd1855adaa81e2a0750b80fda2310];
n = 0x10090512da9af72b08349d98a5dd4c7b0532eca51ce03e2d10f3b7ac579bd87e909ae40a6f131e9cfce5bd967;
h = 0xff70;
Copy to clipboard

LaTeX

$\begin{aligned}
y^2 + x y &= x^3 + a x^2 + b \pmod{f(z)} \\
f(z) &= z^{368} + z^{85} + z^{2} + z^{1} + 1 \\
a &= 0xe0d2ee25095206f5e2a4f9ed229f1f256e79a0e2b455970d8d0d865bd94778c576d62f0ab7519ccd2a1a906ae30d \\
b &= 0xfc1217d4320a90452c760a58edcd30c8dd069b3c34453837a34ed50cb54917e1c2112d84d164f444f8f74786046a \\
G &= (0x1085e2755381dccce3c1557afa10c2f0c0c2825646c5b34a394cbcfa8bc16b22e7e789e927be216f02e1fb136a5f, 0x7b3eb1bddcba62d5d8b2059b525797fc73822c59059c623a45ff3843cee8f87cd1855adaa81e2a0750b80fda2310) \\
n &= 0x10090512da9af72b08349d98a5dd4c7b0532eca51ce03e2d10f3b7ac579bd87e909ae40a6f131e9cfce5bd967 \\
h &= 0xff70
\end{aligned}$
Copy to clipboard