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Added in API level 1

Summary: Constants | Inherited Constants | Inherited Methods

PublicKey

public interface PublicKey
implements Key

java.security.PublicKey

Known indirect subclasses

DHPublicKey, DSAPublicKey, ECPublicKey, EdECPublicKey, RSAPublicKey, XECPublicKey

DHPublicKey	The interface to a Diffie-Hellman public key.
DSAPublicKey	The interface to a DSA public key.
ECPublicKey	The interface to an elliptic curve (EC) public key.
EdECPublicKey	An interface for an elliptic curve public key as defined by RFC 8032: Edwards-Curve Digital Signature Algorithm (EdDSA).
RSAPublicKey	The interface to an RSA public key.
XECPublicKey	An interface for an elliptic curve public key as defined by RFC 7748.

A public key. This interface contains no methods or constants. It merely serves to group (and provide type safety for) all public key interfaces. Note: The specialized public key interfaces extend this interface. See, for example, the DSAPublicKey interface in java.security.interfaces.

See also:

Summary

Constants
`long`	`serialVersionUID` This constant was deprecated in API level 34. A `serialVersionUID` field in an interface is ineffectual. Do not use; no replacement.

Inherited constants

From interface java.security.Key

long

serialVersionUID

This constant was deprecated in API level 34. A serialVersionUID field in an interface is ineffectual. Do not use; no replacement.

Inherited methods

From interface


        
          java.security.Key

`abstract String`	`getAlgorithm()` Returns the standard algorithm name for this key.
`abstract byte[]`	`getEncoded()` Returns the key in its primary encoding format, or null if this key does not support encoding.
`abstract String`	`getFormat()` Returns the name of the primary encoding format of this key, or null if this key does not support encoding.

Constants

serialVersionUID

Added in API level 1
Deprecated in API level 34

public static final long serialVersionUID

This constant was deprecated in API level 34.
A serialVersionUID field in an interface is ineffectual. Do not use; no replacement.

The class fingerprint that is set to indicate serialization compatibility with a previous version of the class.

Constant Value: 7187392471159151072 (0x63bebf5f40c219e0)

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Last updated 2026-08-03 UTC.

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