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## Uses of Package
java.security

Packages that use java.security
java.io | Provides for system input and output through data streams, serialization and the file system.
java.lang | Provides classes that are fundamental to the design of the Java programming language.
java.lang.reflect | Provides classes and interfaces for obtaining reflective information about classes and objects.
java.net | Provides the classes for implementing networking applications.
java.security | Provides the classes and interfaces for the security framework.
java.security.acl | The classes and interfaces in this package have been superseded by classes in the java.security package.
java.security.cert | Provides classes and interfaces for parsing and managing certificates.
java.security.interfaces | Provides interfaces for generating RSA (Rivest, Shamir and Adleman AsymmetricCipher algorithm) keys as defined in the RSA Laboratory Technical Note PKCS#1, and DSA (Digital Signature Algorithm) keys as defined in NIST's FIPS-186.
java.security.spec | Provides classes and interfaces for key specifications and algorithm parameter specifications.
java.util | Contains the collections framework, legacy collection classes, event model, date and time facilities, internationalization, and miscellaneous utility classes (a string tokenizer, a random-number generator, and a bit array).

Classes in java.security used by java.io
BasicPermission The BasicPermission class extends the Permission class, and can be used as the base class for permissions that want to follow the same naming convention as BasicPermission.
Guard This interface represents a guard, which is an object that is used to protect access to another object.
Permission Abstract class for representing access to a system resource.
PermissionCollection Abstract class representing a collection of Permission objects.

Classes in java.security used by java.lang
BasicPermission The BasicPermission class extends the Permission class, and can be used as the base class for permissions that want to follow the same naming convention as BasicPermission.
Guard This interface represents a guard, which is an object that is used to protect access to another object.
Permission Abstract class for representing access to a system resource.
ProtectionDomain This ProtectionDomain class encapulates the characteristics of a domain, which encloses a set of classes whose instances are granted the same set of permissions.

Classes in java.security used by java.lang.reflect
BasicPermission The BasicPermission class extends the Permission class, and can be used as the base class for permissions that want to follow the same naming convention as BasicPermission.
Guard This interface represents a guard, which is an object that is used to protect access to another object.
Permission Abstract class for representing access to a system resource.

Classes in java.security used by java.net
BasicPermission The BasicPermission class extends the Permission class, and can be used as the base class for permissions that want to follow the same naming convention as BasicPermission.
CodeSource This class extends the concept of a codebase to encapsulate not only the location (URL) but also the certificate(s) that were used to verify signed code originating from that location.
Guard This interface represents a guard, which is an object that is used to protect access to another object.
Permission Abstract class for representing access to a system resource.
PermissionCollection Abstract class representing a collection of Permission objects.
SecureClassLoader This class extends ClassLoader with additional support for defining classes with an associated code source and permissions which are retrieved by the system policy by default.

Classes in java.security used by java.security
AccessControlContext An AccessControlContext is used to make system resource access decisions based on the context it encapsulates.
AccessControlException This exception is thrown by the AccessController to indicate that a requested access (to a critical system resource such as the file system or the network) is denied.
AlgorithmParameterGenerator The `AlgorithmParameterGenerator` class is used to generate a set of parameters to be used with a certain algorithm.
AlgorithmParameterGeneratorSpi This class defines the Service Provider Interface (SPI) for the `AlgorithmParameterGenerator` class, which is used to generate a set of parameters to be used with a certain algorithm.
AlgorithmParameters This class is used as an opaque representation of cryptographic parameters.
AlgorithmParametersSpi This class defines the Service Provider Interface (SPI) for the `AlgorithmParameters` class, which is used to manage algorithm parameters.
BasicPermission The BasicPermission class extends the Permission class, and can be used as the base class for permissions that want to follow the same naming convention as BasicPermission.
Certificate Deprecated. A new certificate handling package is created in the Java 2 platform. This Certificate interface is entirely deprecated and is here to allow for a smooth transition to the new package.
CodeSource This class extends the concept of a codebase to encapsulate not only the location (URL) but also the certificate(s) that were used to verify signed code originating from that location.
DigestException This is the generic Message Digest exception.
DomainCombiner A `DomainCombiner` provides a means to dynamically update the ProtectionDomains associated with the current `AccessControlContext`.
GeneralSecurityException This is the general security exception class, which serves to group all the exception classes of the `java.security` package that extend from it.
Guard This interface represents a guard, which is an object that is used to protect access to another object.
Identity Deprecated. This class is no longer used. Its functionality has been replaced by `java.security.KeyStore`, the `java.security.cert` package, and `java.security.Principal`.
IdentityScope Deprecated. This class is no longer used. Its functionality has been replaced by `java.security.KeyStore`, the `java.security.cert` package, and `java.security.Principal`.
InvalidAlgorithmParameterException This is the exception for invalid or inappropriate algorithm parameters.
InvalidKeyException This is the exception for invalid Keys (invalid encoding, wrong length, uninitialized, etc).
InvalidParameterException This exception is thrown when an invalid parameter is passed to a method.
Key The Key interface is the top-level interface for all keys.
KeyException This is the basic key exception.
KeyFactory Key factories are used to convert keys (opaque cryptographic keys of type `Key`) into key specifications (transparent representations of the underlying key material), and vice versa.
KeyFactorySpi This class defines the Service Provider Interface (SPI) for the `KeyFactory` class.
KeyManagementException This is the general key management exception, for all operations dealing with key management.
KeyPair This class is a simple holder for a key pair (a public key and a private key).
KeyPairGenerator The KeyPairGenerator class is used to generate pairs of public and private keys.
KeyPairGeneratorSpi This class defines the Service Provider Interface (SPI) for the `KeyPairGenerator` class, which is used to generate pairs of public and private keys.
KeyStore This class represents an in-memory collection of keys and certificates.
KeyStoreException This is the generic KeyStore exception.
KeyStoreSpi This class defines the Service Provider Interface (SPI) for the `KeyStore` class.
MessageDigest This MessageDigest class provides applications the functionality of a message digest algorithm, such as MD5 or SHA.
MessageDigestSpi This class defines the Service Provider Interface (SPI) for the `MessageDigest` class, which provides the functionality of a message digest algorithm, such as MD5 or SHA.
NoSuchAlgorithmException This exception is thrown when a particular cryptographic algorithm is requested but is not available in the environment.
NoSuchProviderException This exception is thrown when a particular security provider is requested but is not available in the environment.
Permission Abstract class for representing access to a system resource.
PermissionCollection Abstract class representing a collection of Permission objects.
Policy This is an abstract class for representing the system security policy for a Java application environment (specifying which permissions are available for code from various sources).
Principal This interface represents the abstract notion of a principal, which can be used to represent any entity, such as an individual, a corporation, and a login id.
PrivateKey A private key.
PrivilegedAction A computation to be performed with privileges enabled.
PrivilegedActionException This exception is thrown by `doPrivileged(PrivilegedExceptionAction)` and `doPrivileged(PrivilegedExceptionAction, AccessControlContext context)` to indicate that the action being performed threw a checked exception.
PrivilegedExceptionAction A computation to be performed with privileges enabled, that throws one or more checked exceptions.
ProtectionDomain This ProtectionDomain class encapulates the characteristics of a domain, which encloses a set of classes whose instances are granted the same set of permissions.
Provider This class represents a "provider" for the Java Security API, where a provider implements some or all parts of Java Security, including: Algorithms (such as DSA, RSA, MD5 or SHA-1).
PublicKey A public key.
SecureRandom This class provides a cryptographically strong pseudo-random number generator (PRNG).
SecureRandomSpi This class defines the Service Provider Interface (SPI) for the `SecureRandom` class.
Signature This Signature class is used to provide applications the functionality of a digital signature algorithm.
SignatureException This is the generic Signature exception.
SignatureSpi This class defines the Service Provider Interface (SPI) for the `Signature` class, which is used to provide the functionality of a digital signature algorithm.
UnrecoverableKeyException This exception is thrown if a key in the keystore cannot be recovered.

Classes in java.security used by java.security.acl
Principal This interface represents the abstract notion of a principal, which can be used to represent any entity, such as an individual, a corporation, and a login id.

Classes in java.security used by java.security.cert
GeneralSecurityException This is the general security exception class, which serves to group all the exception classes of the `java.security` package that extend from it.
InvalidKeyException This is the exception for invalid Keys (invalid encoding, wrong length, uninitialized, etc).
NoSuchAlgorithmException This exception is thrown when a particular cryptographic algorithm is requested but is not available in the environment.
NoSuchProviderException This exception is thrown when a particular security provider is requested but is not available in the environment.
Principal This interface represents the abstract notion of a principal, which can be used to represent any entity, such as an individual, a corporation, and a login id.
Provider This class represents a "provider" for the Java Security API, where a provider implements some or all parts of Java Security, including: Algorithms (such as DSA, RSA, MD5 or SHA-1).
PublicKey A public key.
SignatureException This is the generic Signature exception.

Classes in java.security used by java.security.interfaces
InvalidParameterException This exception is thrown when an invalid parameter is passed to a method.
Key The Key interface is the top-level interface for all keys.
PrivateKey A private key.
PublicKey A public key.
SecureRandom This class provides a cryptographically strong pseudo-random number generator (PRNG).

Classes in java.security used by java.security.spec
GeneralSecurityException This is the general security exception class, which serves to group all the exception classes of the `java.security` package that extend from it.

Classes in java.security used by java.util
BasicPermission The BasicPermission class extends the Permission class, and can be used as the base class for permissions that want to follow the same naming convention as BasicPermission.
Guard This interface represents a guard, which is an object that is used to protect access to another object.
Permission Abstract class for representing access to a system resource.
PermissionCollection Abstract class representing a collection of Permission objects.

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