# ``twisted`.`conch`.`ssh`.`_kex`.`_IEllipticCurveExchangeKexAlgorithm``

interface documentation

`class _IEllipticCurveExchangeKexAlgorithm(_IKexAlgorithm): (source)`

Known implementations: `twisted.conch.ssh._kex._Curve25519SHA256`, `twisted.conch.ssh._kex._Curve25519SHA256LibSSH`, `twisted.conch.ssh._kex._ECDH256`, `twisted.conch.ssh._kex._ECDH384`, `twisted.conch.ssh._kex._ECDH512`

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An `_IEllipticCurveExchangeKexAlgorithm` describes a key exchange algorithm that uses an elliptic curve exchange between the client and server.

Inherited from `_IKexAlgorithm`:

Attribute | `hashProcessor` | A callable hash algorithm constructor (e.g. `hashlib.sha256`) suitable for use with this key exchange algorithm.
Attribute | `preference` | An `int` giving the preference of the algorithm when negotiating key exchange. Algorithms with lower precedence values are more preferred.