Non-linear data converter, encoder and decoder
First Claim
Patent Images
1. A non-linear data converter including a CPU and comprising:
- a first converter that performs a first process on an input bit string to output a first output bit string, the first process equivalent to performing;
a mask process using a first mask,a non-linear conversion predetermined for performing an encoding or a decoding, anda mask process using a second mask;
a second converter that performs a second process on the input bit string to output a second output bit string, the second process equivalent to performing;
the mask process using the first mask,the non-linear conversion, anda mask process using an inverted second mask;
a third converter that performs a third process on the input bit string to output a third output bit string, the third process equivalent to performing;
a mask process using an inverted first mask,the non-linear conversion, andthe mask process using the second mask;
a fourth converter that performs a fourth process on the input bit string to output a fourth output bit string, the fourth process equivalent to performing;
the mask process using the inverted first mask,the non-linear conversion, andthe mask process using the inverted second mask;
a generator that generates a random number bit string; and
a selector that selects any one of the first to fourth output bit strings based on the random number bit string.
1 Assignment
0 Petitions
Accused Products
Abstract
According to an aspect of the present invention, there is provided a non-linear data converter including: first to fourth converters that each performs a respective converting process on an input bit string to output respective output bit string; a generator that generates a random number bit string; and a selector that selects any one of the output bit strings from the first to fourth converters based on the random number bit string. Each of the converting processes is equivalent to performing a first mask process, a non-linear conversion predetermined for an encoding or a decoding and a second mask process.
3 Citations
3 Claims
-
1. A non-linear data converter including a CPU and comprising:
-
a first converter that performs a first process on an input bit string to output a first output bit string, the first process equivalent to performing; a mask process using a first mask, a non-linear conversion predetermined for performing an encoding or a decoding, and a mask process using a second mask; a second converter that performs a second process on the input bit string to output a second output bit string, the second process equivalent to performing; the mask process using the first mask, the non-linear conversion, and a mask process using an inverted second mask; a third converter that performs a third process on the input bit string to output a third output bit string, the third process equivalent to performing; a mask process using an inverted first mask, the non-linear conversion, and the mask process using the second mask; a fourth converter that performs a fourth process on the input bit string to output a fourth output bit string, the fourth process equivalent to performing; the mask process using the inverted first mask, the non-linear conversion, and the mask process using the inverted second mask; a generator that generates a random number bit string; and a selector that selects any one of the first to fourth output bit strings based on the random number bit string. - View Dependent Claims (2, 3)
-
Specification