RandomizedTrapdoorFunction Class Reference

Applies the trapdoor function, using random data if required. More...

#include <pubkey.h>

Inheritance diagram for RandomizedTrapdoorFunction:

Collaboration diagram for RandomizedTrapdoorFunction:

Public Member Functions
virtual	~RandomizedTrapdoorFunction ()
virtual Integer	ApplyRandomizedFunction (RandomNumberGenerator &rng, const Integer &x) const =0
	Applies the trapdoor function, using random data if required. More...
virtual bool	IsRandomized () const
	Determines if the encryption algorithm is randomized. More...
Public Member Functions inherited from TrapdoorFunctionBounds
virtual	~TrapdoorFunctionBounds ()
virtual Integer	PreimageBound () const =0
	Returns the maximum size of a message before the trapdoor function is applied. More...
virtual Integer	ImageBound () const =0
	Returns the maximum size of a message after the trapdoor function is applied. More...
virtual Integer	MaxPreimage () const
	Returns the maximum size of a message before the trapdoor function is applied bound to a public key. More...
virtual Integer	MaxImage () const
	Returns the maximum size of a message after the trapdoor function is applied bound to a public key. More...

Detailed Description

Applies the trapdoor function, using random data if required.

ApplyFunction() is the foundation for encrypting a message under a public key. Derived classes will override it at some point.

See also

TrapdoorFunctionBounds(), RandomizedTrapdoorFunction(), TrapdoorFunction(), RandomizedTrapdoorFunctionInverse() and TrapdoorFunctionInverse()

Definition at line 102 of file pubkey.h.

Constructor & Destructor Documentation

virtual RandomizedTrapdoorFunction::~RandomizedTrapdoorFunction ( )

inlinevirtual

Definition at line 105 of file pubkey.h.

Member Function Documentation

virtual Integer RandomizedTrapdoorFunction::ApplyRandomizedFunction ( RandomNumberGenerator &  rng, const Integer &  x  ) const

pure virtual

Applies the trapdoor function, using random data if required.

Parameters

rng	a RandomNumberGenerator derived class
x	the message on which the encryption function is applied

Returns

the message x encrypted under the public key

ApplyRandomizedFunction is a generalization of encryption under a public key cryptosystem. The RandomNumberGenerator may (or may not) be required. Derived classes must implement it.

Implemented in TrapdoorFunction.

virtual bool RandomizedTrapdoorFunction::IsRandomized ( ) const

inlinevirtual

Determines if the encryption algorithm is randomized.

Returns

true if the encryption algorithm is randomized, false otherwise

If IsRandomized() returns false, then NullRNG() can be used.

Reimplemented in TrapdoorFunction.

Definition at line 119 of file pubkey.h.

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The documentation for this class was generated from the following file:

• src/cryptopp/pubkey.h