Crypto++  5.6.3
Free C++ class library of cryptographic schemes
Public Member Functions | List of all members
RandomizedTrapdoorFunction Class Referenceabstract

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

+ Inheritance diagram for RandomizedTrapdoorFunction:

Public Member Functions

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 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 99 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
rnga RandomNumberGenerator derived class
xthe 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 118 of file pubkey.h.


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