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secp160r2

160-bit prime field Weierstrass curve.

A randomly generated curve. SEC2v1 states 'E was chosen verifiably at random as specified in ANSI X9.62 1 from the seed'.


Also known as: ansip160r2
y2x3+ax+by^2 \equiv x^3 + ax + b

Parameters

NameValue
p0xfffffffffffffffffffffffffffffffeffffac73
a0xfffffffffffffffffffffffffffffffeffffac70
b0xb4e134d3fb59eb8bab57274904664d5af50388ba
G(0x52dcb034293a117e1f4ff11b30f7199d3144ce6d, 0xfeaffef2e331f296e071fa0df9982cfea7d43f2e)
n0x0100000000000000000000351ee786a818f3a1a16b
h0x01

Characteristics

  • OID:
    1.3.132.0.30
  • Seed:
    B99B99B099B323E02709A4D696E6768756151751
  • j-invariant:
    1027058635636405814575941827615445452503699747171
  • Trace of Frobenius:
    -250855509121001538581751
  • Discriminant:
    1237703873357928705511536972446330043119280998656
  • Anomalous:
    false
  • Supersingular:
    false
  • Embedding degree:
    730750818665451459101842541785896070326588068021
  • CM-discriminant:
    5846006549323611672814739581720641199608088798915
  • Conductor:
    1

SAGE

p = 0xfffffffffffffffffffffffffffffffeffffac73
K = GF(p)
a = K(0xfffffffffffffffffffffffffffffffeffffac70)
b = K(0xb4e134d3fb59eb8bab57274904664d5af50388ba)
E = EllipticCurve(K, (a, b))
G = E(0x52dcb034293a117e1f4ff11b30f7199d3144ce6d, 0xfeaffef2e331f296e071fa0df9982cfea7d43f2e)
E.set_order(0x0100000000000000000000351ee786a818f3a1a16b * 0x01)

PARI/GP

p = 0xfffffffffffffffffffffffffffffffeffffac73
a = Mod(0xfffffffffffffffffffffffffffffffeffffac70, p)
b = Mod(0xb4e134d3fb59eb8bab57274904664d5af50388ba, p)
E = ellinit([a, b])
E[16][1] = 0x0100000000000000000000351ee786a818f3a1a16b * 0x01
G = [Mod(0x52dcb034293a117e1f4ff11b30f7199d3144ce6d, p), Mod(0xfeaffef2e331f296e071fa0df9982cfea7d43f2e, p)]

JSON

{
"name": "secp160r2",
"desc": "A randomly generated curve. [SEC2v1](https://www.secg.org/SEC2-Ver-1.0.pdf) states 'E was chosen verifiably at random as specified in ANSI X9.62 [1] from the seed'.",
"oid": "1.3.132.0.30",
"form": "Weierstrass",
"field": {
"type": "Prime",
"p": "0xfffffffffffffffffffffffffffffffeffffac73",
"bits": 160
},
"params": {
"a": {
"raw": "0xfffffffffffffffffffffffffffffffeffffac70"
},
"b": {
"raw": "0xb4e134d3fb59eb8bab57274904664d5af50388ba"
}
},
"generator": {
"x": {
"raw": "0x52dcb034293a117e1f4ff11b30f7199d3144ce6d"
},
"y": {
"raw": "0xfeaffef2e331f296e071fa0df9982cfea7d43f2e"
}
},
"order": "0x0100000000000000000000351ee786a818f3a1a16b",
"cofactor": "0x01",
"aliases": [
"x963/ansip160r2"
],
"characteristics": {
"seed": "B99B99B099B323E02709A4D696E6768756151751",
"j_invariant": "1027058635636405814575941827615445452503699747171",
"anomalous": false,
"cm_disc": "5846006549323611672814739581720641199608088798915",
"conductor": "1",
"discriminant": "1237703873357928705511536972446330043119280998656",
"embedding_degree": "730750818665451459101842541785896070326588068021",
"torsion_degrees": [
{
"full": 3,
"least": 3,
"r": 2
},
{
"full": 4,
"least": 4,
"r": 3
},
{
"full": 3,
"least": 3,
"r": 5
},
{
"full": 4,
"least": 4,
"r": 7
},
{
"full": 20,
"least": 20,
"r": 11
}
],
"supersingular": false,
"trace_of_frobenius": "-250855509121001538581751"
}
}

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