See: Description
Interface  Description 

AlgorithmParameterSpec 
A (transparent) specification of cryptographic parameters.

ECField 
This interface represents an elliptic curve (EC) finite field.

KeySpec 
A (transparent) specification of the key material
that constitutes a cryptographic key.

Class  Description 

DSAParameterSpec 
This class specifies the set of parameters used with the DSA algorithm.

DSAPrivateKeySpec 
This class specifies a DSA private key with its associated parameters.

DSAPublicKeySpec 
This class specifies a DSA public key with its associated parameters.

ECFieldF2m 
This immutable class defines an elliptic curve (EC)
characteristic 2 finite field.

ECFieldFp 
This immutable class defines an elliptic curve (EC) prime
finite field.

ECGenParameterSpec 
This immutable class specifies the set of parameters used for
generating elliptic curve (EC) domain parameters.

ECParameterSpec 
This immutable class specifies the set of domain parameters
used with elliptic curve cryptography (ECC).

ECPoint 
This immutable class represents a point on an elliptic curve (EC)
in affine coordinates.

ECPrivateKeySpec 
This immutable class specifies an elliptic curve private key with
its associated parameters.

ECPublicKeySpec 
This immutable class specifies an elliptic curve public key with
its associated parameters.

EllipticCurve 
This immutable class holds the necessary values needed to represent
an elliptic curve.

EncodedKeySpec 
This class represents a public or private key in encoded format.

MGF1ParameterSpec 
This class specifies the set of parameters used with mask generation
function MGF1 in OAEP Padding and RSAPSS signature scheme, as
defined in the
PKCS #1 v2.1
standard.

PKCS8EncodedKeySpec 
This class represents the ASN.1 encoding of a private key,
encoded according to the ASN.1 type
PrivateKeyInfo . 
PSSParameterSpec 
This class specifies a parameter spec for RSAPSS signature scheme,
as defined in the
PKCS#1 v2.1
standard.

RSAKeyGenParameterSpec 
This class specifies the set of parameters used to generate an RSA
key pair.

RSAMultiPrimePrivateCrtKeySpec 
This class specifies an RSA multiprime private key, as defined in the
PKCS#1 v2.1, using the Chinese Remainder Theorem (CRT) information
values for efficiency.

RSAOtherPrimeInfo 
This class represents the triplet (prime, exponent, and coefficient)
inside RSA's OtherPrimeInfo structure, as defined in the PKCS#1 v2.1.

RSAPrivateCrtKeySpec 
This class specifies an RSA private key, as defined in the PKCS#1
standard, using the Chinese Remainder Theorem (CRT) information values for
efficiency.

RSAPrivateKeySpec 
This class specifies an RSA private key.

RSAPublicKeySpec 
This class specifies an RSA public key.

X509EncodedKeySpec 
This class represents the ASN.1 encoding of a public key,
encoded according to the ASN.1 type
SubjectPublicKeyInfo . 
Exception  Description 

InvalidKeySpecException 
This is the exception for invalid key specifications.

InvalidParameterSpecException 
This is the exception for invalid parameter specifications.

A key specification is a transparent representation of the key material that constitutes a key. A key may be specified in an algorithmspecific way, or in an algorithmindependent encoding format (such as ASN.1). This package contains key specifications for DSA public and private keys, RSA public and private keys, PKCS #8 private keys in DERencoded format, and X.509 public and private keys in DERencoded format.
An algorithm parameter specification is a transparent representation of the sets of parameters used with an algorithm. This package contains an algorithm parameter specification for parameters used with the DSA algorithm.
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For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developertargeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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