Topshirdi: zaynobiddinov abdurahim

O‘ZBEKISTON RESPUBLIKASI AXBOROT TEXNOLOGIYALARI VA KOMMUNIKATSIYALARINI RIVOJLANTIRISH VAZIRLIGI

MUHAMMAD AL-XORAZMIY NOMIDAGI
TOSHKENT AXBOROT TEXNOLOGIYALARI UNIVERSITETI

KRIPTOGRAFIYA 1 fanidan

AMALIY ISH 2

TOPSHIRDI: ZAYNOBIDDINOV ABDURAHIM.

TEKSHIRDI: MARDIYEV ULUG`BEK

Toshkent 2020

1-TOPSHIRIQ.

ODDIY O`RIN ALMASHTIRISH USULIDA SHIFRLASH.

K=5x7 T0=ZAYNOBIDDINOVABDURAHIMNIYOZBEKOGLIA

0	1	2	3	4	5	6	7
1	Z	B	N	D	I	O	O
2	A	I	O	U	M	Z	G
3	Y	D	V	R	N	B	L
4	N	D	A	A	I	E	I
5	O	I	B	H	Y	K	A

SHIFRMATN: T1=ZBNDIOO_AIOUMZG_YDVRNBL_NDAAIEI_OIBHYKA;

VA SHU TARTIBGA TESKARI RAVISHDA DESHIFRLASH JADVALI HAM TUZILADI.

0	1	2	3	4	5	6	7
1	Z	B	N	D	I	O	O
2	A	I	O	U	M	Z	G
3	Y	D	V	R	N	B	L
4	N	D	A	A	I	E	I
5	O	I	B	H	Y	K	A

T0=ZAYNOBIDDINOVABDURAHIMNIYOZBEKOGLIA

3-TOPSHIRIQ.

KALIT SO`Z YORDAMIDA O`RIN ALMASHTIRISH SHIFRLASH.

T0=ZAYNOBIDDINOVABDURAHIMNIYOZBEKOGLIA

K=SHAXZOD

	1	2	3	4	5	6	7
K	S	H	A	X	Z	O	D
K	5	3	1	6	7	4	2
1	Z	B	N	D	I	O	O
2	A	I	O	U	M	Z	G
3	Y	D	V	R	N	B	L
4	N	D	A	A	I	E	I
5	O	I	B	H	Y	K	A

	1	2	3	4	5	6	7
K	A	D	H	O	S	X	Z
K	1	2	3	4	5	6	7
1	N	O	B	O	Z	D	I
2	O	G	I	Z	A	U	M
3	V	L	D	B	Y	R	N
4	A	I	D	E	N	A	I
5	B	A	I	K	O	H	Y

Shifr matn: NOBOZDI_OGIZAUM_VLDBYRN_AIDENAI_BAIKOHY

KALIT SO`Z YORDAMIDA O`RIN ALMASHTIRISH

DESHIFRLASH.

T0=ZAYNOBIDDINOVABDURAHIMNIYOZBEKOGLIA

	1	2	3	4	5	6	7
K	A	D	H	O	S	X	Z
K	1	2	3	4	5	6	7
1	N	O	B	O	Z	D	I
2	O	G	I	Z	A	U	M
3	V	L	D	B	Y	R	N
4	A	I	D	E	N	A	I
5	B	A	I	K	O	H	Y

KALIT: SHAXZOD

BERILGAN JADVALDAN KALIT SO`ZNI TIKLASAK BIZNING OCHIQ MATN KELIB CHIQADI.

	1	2	3	4	5	6	7
K	S	H	A	X	Z	O	D
K	5	3	1	6	7	4	2
1	Z	B	N	D	I	O	O
2	A	I	O	U	M	Z	G
3	Y	D	V	R	N	B	L
4	N	D	A	A	I	E	I
5	O	I	B	H	Y	K	A
1	Z	B	N	D	I	O	O
2	A	I	O	U	M	Z	G
3	Y	D	V	R	N	B	L
4	N	D	A	A	I	E	I
5	O	I	B	H	Y	K	A

DESHIFRMATN: ZAYNOBIDDINOVABDURAHIMNIYOZBEKOGLIA

4-TOPSHIRIQ.

AFFIN SHIFRI: a=11; b=5; m=26;

OCHIQMATN	Z	A	Y	N	O	B	I	D	D	I	N	O	V	A	B	D	U	R	A		H	I	M
X	25	0	24	13	14	1	8	3	3	8	13	14	21	0	1	3	20	17	0		7	8	12
11x+5	280	5	269	148	159	16	93	38	38	93	148	159	236	5	16	38	225	192	5		82	92	137
(11x+5)mod26	20	5	10	18	3	16	15	12	12	15	18	3	2	5	16	12	17	10	5		4	14	7
SHIFRMATN	U	F	K	S	D	Q	P	M	M	P	S	D	C	F	Q	M	R	K	F		E	O	H

SHIFRMATN:

SHIFRMATN

U

F

K

S

D

Q

P

M

M

P

S

D

C

F

Q

M

R

K

F

F

O

H

Deshifrlash:

Shifrmatn: UFKSDQPMMPSDCFQMRKFFOH

KALIT: a=11; b=5;

mod 26=x; 11x=1 mod 26;

26=11(2)+4; 4=26-11(2);

11=4(2)+3; 3=11-4(2);

4=3(1)+1; 1=4-3(1);

1=4-3(1)=4-(11-4(2))(1)=4(3)-11(1)=(26-11(2))(3)-11(1)=26(3)-11(7)= 26(3)+11(-7);

X=-7;

SHIFRMATN:	U	F	K	S	D	Q	P	M	M	P	S	D	C	F	Q	M	R	K	F	E	O	H
y	20	5	10	18	3	16	15	12	12	15	18	3	2	5	16	12	17	10	5	4	14	7
-7(y-5)	-105	0	-35	-91	14	-77	-70	-102	-102	-70	-91	14	21	0	-77	-102	-84	-35	0	7	-63	-14
-7(y-5)mod26	25	0	24	13	14	1	8	3	3	8	13	14	21	0	1	3	20	17	0	7	8	12
OCHIQ MATN	Z	A	Y	N	O	B	I	D	D	I	N	O	V	A	B	D	U	R	A	H	I	M