Module java.base
Package java.security.interfaces

# Interface XECPublicKey

All Superinterfaces:
  `Key`, `PublicKey`, `Serializable`, `XECKey`

public interface XECPublicKey extends XECKey, PublicKey
An interface for an elliptic curve public key as defined by RFC 7748. These keys are distinct from the keys represented by `ECPublicKey`, and they are intended for use with algorithms based on RFC 7748 such as the XDH `KeyAgreement` algorithm. An XEC public key is a particular point on the curve, which is represented using only its u-coordinate as described in RFC 7748. A u-coordinate is an element of the field of integers modulo some value that is determined by the algorithm parameters. This field element is represented by a BigInteger which may hold any value. That is, the BigInteger is not restricted to the range of canonical field elements.

Since:
  11

## Field Summary

### Fields declared in interface java.security.PublicKey

`serialVersionUID`

## Method Summary

Modifier and Type
Method
Description
`BigInteger`
`getU()`
Get the u coordinate of the point.

### Methods declared in interface java.security.Key

`getAlgorithm, getEncoded, getFormat`

### Methods declared in interface java.security.interfaces.XECKey

`getParams`

## Method Details

### getU

BigInteger getU()
Get the u coordinate of the point.

Returns:
  the u-coordinate, represented using a BigInteger which may hold any value