Crypto++ 8.1 Free C++ class library of cryptographic schemes

Public Member Functions | List of all members
RandomizedTrapdoorFunctionInverse Class Referenceabstract

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

Inheritance diagram for RandomizedTrapdoorFunctionInverse:

## Public Member Functions
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 154 of file pubkey.h.

## Member Function Documentation

## ◆ CalculateRandomizedInverse()

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.

## ◆ IsRandomized()

virtual bool RandomizedTrapdoorFunctionInverse::IsRandomized | ( |  | ) | const
| inline virtual

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 170 of file pubkey.h.

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

- pubkey.h