Returns the standard algorithm name for this key. For example, "DSA" would indicate that this key is a DSA key. See Appendix A in the <a href= "../../../technotes/guides/security/crypto/CryptoSpec.html#AppA"> Java Cryptography Architecture API Specification & Reference </a> for information about standard algorithm names.
Returns the name of the primary encoding format of this key, or null if this key does not support encoding. The primary encoding format is named in terms of the appropriate ASN.1 data format, if an ASN.1 specification for this key exists. For example, the name of the ASN.1 data format for public keys is <I>SubjectPublicKeyInfo</I>, as defined by the X.509 standard; in this case, the returned format is {@code "X.509"}. Similarly, the name of the ASN.1 data format for private keys is <I>PrivateKeyInfo</I>, as defined by the PKCS #8 standard; in this case, the returned format is {@code "PKCS#8"}.
Returns the key in its primary encoding format, or null if this key does not support encoding.
<p>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 {@code java.security.interfaces}.
@see Key @see PrivateKey @see Certificate @see Signature#initVerify @see java.security.interfaces.DSAPublicKey @see java.security.interfaces.RSAPublicKey