RandomizedTrapdoorFunctionInverse Class Reference

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

#include <pubkey.h>

Inheritance diagram for RandomizedTrapdoorFunctionInverse:

Public Member Functions
virtual	~RandomizedTrapdoorFunctionInverse ()
virtual Integer	CalculateRandomizedInverse (RandomNumberGenerator &rng, const Integer &x) const =0
	Applies the inverse of the trapdoor function, using random data if required. More...
virtual bool	IsRandomized () const
	Determines if the decryption algorithm is randomized. More...

Detailed Description

Applies the inverse of the trapdoor function, using random data if required.

CalculateInverse() is the foundation for decrypting a message under a private key in a public key cryptosystem. Derived classes will override it at some point.

See also

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

Definition at line 158 of file pubkey.h.

Constructor & Destructor Documentation

virtual RandomizedTrapdoorFunctionInverse::~RandomizedTrapdoorFunctionInverse ( )

inlinevirtual

Definition at line 161 of file pubkey.h.

Member Function Documentation

virtual Integer RandomizedTrapdoorFunctionInverse::CalculateRandomizedInverse ( RandomNumberGenerator &  rng, const Integer &  x  ) const

pure virtual

Applies the inverse of the trapdoor function, using random data if required.

Parameters

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

Returns

the message x decrypted under the private key

CalculateRandomizedInverse is a generalization of decryption using the private key The RandomNumberGenerator may (or may not) be required. Derived classes must implement it.

Implemented in TrapdoorFunctionInverse, and InvertibleESIGNFunction.

virtual bool RandomizedTrapdoorFunctionInverse::IsRandomized ( ) const

inlinevirtual

Determines if the decryption algorithm is randomized.

Returns

true if the decryption algorithm is randomized, false otherwise

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

Reimplemented in TrapdoorFunctionInverse.

Definition at line 174 of file pubkey.h.

---

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

• src/cryptopp/pubkey.h