How can i implement galois counter mode (GCM) in matlab?

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Darsana P M 2017-9-18

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https://ww2.mathworks.cn/matlabcentral/answers/357161-how-can-i-implement-galois-counter-mode-gcm-in-matlab

评论： Zeeshan Abbas 2019-6-19

The image above shows an algorithm to find the multiplication of 2 blocks using galois field.I tried implementing it,but got an error.Can somebody help me??

clc;
clear all;
close all;
x=01101101;
Z=00000000;
v=11001011;
for i=0:1:8
    if x(i)== 0
        Z(i+1)= Zi;
    else xi == 1
        Z(i+1)= xor(Zi,Vi);
    end
end

The error was: Subscript indices must either be real positive integers or logicals.

Error in algo1 (line 8) if x(i)== 0

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采纳的回答

Ahmed Grera 2017-9-18

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https://ww2.mathworks.cn/matlabcentral/answers/357161-how-can-i-implement-galois-counter-mode-gcm-in-matlab#answer_282034

编辑：Ahmed Grera 2017-9-18

在 MATLAB Online 中打开

Hi Darsana P M

You can retype it like this:

clc;
clear all;
close all;
x=[0 1 1 0 1 1 0 1];
Z=[0 0 0 0 0 0 0 0];
v=[1 1 0 0 1 0 1 1];
for i=1:1:8  %-----or use i=1:8------
    if x(i)== 0
        Z(i+1)= Z(i);
    else x(i) == 1;
        Z(i+1)= xor(Z(i),v(i));
    end
end
Z

Greetings Eng. Ahmed G

Good luck

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Ahmed Grera 2017-9-18

Hi Darsana P M

Following the answer I have just posted to your question.

Would you please be so kind to have a look and if it helps, would you please consider marking my answer as accepted answer by clicking on the Accepted Answer? thanks in advance, awaiting