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2023-02-21 16:36:09 +0200 commented answer LFSR sequences over GF(4)

Thanks a lot dear Max Alekseyev

2023-02-21 16:35:18 +0200 received badge  Supporter (source)
2023-02-21 16:35:15 +0200 marked best answer LFSR sequences over GF(4)

I want to create sequences generated by the polynomial $x^2+\alpha x+1$ where coefficients are from $\mathbb{F}_4$ s.t. $\alpha^2 + \alpha +1=0$. In which $\alpha^2=\alpha+1$ and $\alpha^3=1$.

There are 16 initial states which are:

00,01,0$\alpha$,0$\alpha^2$

10, 11, 1$\alpha$, 1$\alpha^2$

$\alpha$0, $\alpha$1, $\alpha$$\alpha^2$, $\alpha$$\alpha^2$

$\alpha^2$0, $\alpha^2$1, $\alpha^2$$\alpha$, $\alpha^2$$\alpha^2$

For example, by starting with initial state $\alpha$$\alpha^2$, we get 1$\alpha$ + $\alpha$$\alpha^2$= $\alpha$+$\alpha^3$= $\alpha$+1= $\alpha^2$.

Now the sequence is $\alpha \alpha^2 \alpha^2$. To find the 4. item we will use the new state $\alpha^2 \alpha^2$ and we get 1$\alpha^2$ + $\alpha$$\alpha^2$= $\alpha^2$+$\alpha^3$= $\alpha^2$+1= $\alpha$.

Now the sequence is $\alpha \alpha^2 \alpha^2\alpha$.

By the same way we get the sequence $\alpha \alpha^2 \alpha^2\alpha 0 \alpha \alpha^2 \alpha^2...$ of period 5. I could not write the sage code to create the sequence.

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2023-02-20 18:12:52 +0200 commented question LFSR sequences over GF(4)

I can not define a characteristic polynomial $x^2 + \alpha^2 x +1$ for example. Thus I can not create an infinite squenc

2023-02-20 16:10:46 +0200 commented question LFSR sequences over GF(4)

I checked this document page. The elements of F=GF(4) are (0, 1, 0, 1) in order. I dont get it and asked for help here.

2023-02-20 15:54:40 +0200 commented question LFSR sequences over GF(4)

I checked this document page. Thenelements of F=GF(4) are (0, 1, 0, 1) in order. I dont get it and asked for help here.

2023-02-20 14:22:13 +0200 commented question LFSR sequences over GF(4)

No. I am studying sequences over extension fields. I need make with a program. I tryed to make on SAGE but I could not.

2023-02-20 14:20:57 +0200 commented question LFSR sequences over GF(4)

No. I am studying sequences over extension fields. I need make with a program. I tryed to make on SAGE but I could not.

2023-02-20 13:11:50 +0200 edited question LFSR sequences over GF(4)

lfsr over GF(4) I want to create sequences generated by the polynomial $x^2+\alpha x+1$ where coefficients are from $\ma

2023-02-20 11:39:35 +0200 asked a question LFSR sequences over GF(4)

lfsr over GF(4) I want to create sequences generated by the polynomial $x^2+\alpha x+1$ where coefficients are from $\ma

2021-08-28 10:22:56 +0200 commented question Truth table of Maiorana McFarland type functions

You are right. I deleted it.

2021-08-28 10:20:55 +0200 commented question Truth table of Maiorana McFarland type functions

You are right.

2021-08-28 10:18:44 +0200 edited question Truth table of Maiorana McFarland type functions

Truth table of Maiorana McFarland type functions I want to find truth table and Algebraic Normal Form of a Maiorana McFa

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2021-08-03 09:57:34 +0200 edited question Truth table of Maiorana McFarland type functions

Truth table of Maiorana McFarland type functions I want to find truth table and Algebraic Normal Form of a Maiorana McFa

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2021-08-02 23:51:01 +0200 asked a question Truth table of Maiorana McFarland type functions

Truth table of Maiorana McFarland type functions I want to find truth table and Algebraic Normal Form of a Maiorana McFa