Course :- Cryptology

[tauruskhan]

Re: Course :- Cryptology

POLYBIUS CHEQUERBOARD


nechay di gai tasweer key motabik ik matrix banatey haan 5 x 5 ki
is tarah key is main i, j ko ik hi position per raktay haan

and per plain text sey character utta ker , us ko is matrix main dehktay haan
and pir us ka row # and column number likh detay haan

for example
PT : HONESTY

H =23 first row # then column #
O=34
N=33
E=15
T=44
Y=54

ciphertext= 233444154454

[tauruskhan]

Re: Course :- Cryptology

Atbash cipher

is main ABC ko ulta ker detay haan , yani A ko Z, B ko Y and so on

Plaintext = HONESTY
ciphertext = SLMVHGb

[tauruskhan]

Re: Course :- Cryptology

VIGNERE Cipher
is ki mathematical equation hay

yi=(xi+ki) mod n

normal english language key liya

yi=(xi+ki) mod 26

yeh shift cipher ki advance shakal hay

and decryption key liya

xi=(yi-ki) mod n


your assignment

plaintext : filbahere
cipher text banein pir us ko decode kareen

[Shaim]

Re: Course :- Cryptology

POLYBIUS CHEQUERBOARD


nechay di gai tasweer key motabik ik matrix banatey haan 5 x 5 ki
is tarah key is main i, j ko ik hi position per raktay haan

and per plain text sey character utta ker , us ko is matrix main dehktay haan
and pir us ka row # and column number likh detay haan

for example
PT : HONESTY

H =23 first row # then column #
O=34
N=33
E=15
T=44
Y=54

ciphertext= 233444154454

samajh a gaya per ye hai:-

23343315434454........:khi:
u "S" ko khaa hi gai they na:kr:

isko kahaan use kerte hain????
or hum checker board se value nikalte hain na to checker board pehle n VALUE baad mai aani chahiye

intresting hai!:thmbup:

[Shaim]

Re: Course :- Cryptology

Atbash cipher

is main ABC ko ulta ker detay haan , yani A ko Z, B ko Y and so on

Plaintext = HONESTY
ciphertext = SLMVHGb

ok thiik.....per Q???
aisa q kerte hain?:cc:

[Shaim]

Re: Course :- Cryptology

VIGNERE Cipher
is ki mathematical equation hay

yi=(xi+ki) mod n

normal english language key liya

yi=(xi+ki) mod 26

yeh shift cipher ki advance shakal hay

and decryption key liya

xi=(yi-ki) mod n


your assignment

plaintext : filbahere
cipher text banein pir us ko decode kareen

ok ker lon gi per abhi i m xhausted:tauba

[tauruskhan]

Re: Course :- Cryptology

Beaufort Cipher

is ki mathematical equation hay

yi=(ki -xi) mod n

and decryption key liya

xi=(ki- yi) mod n


Varient Beaufort Cipher

yi=(xi-ki) mod n

decryption

xi=(yi+ki) mod n


vignere cipher and varient beufort cipher are inverse of each othe


beaufort cipher is inverse of itself

[tauruskhan]

Re: Course :- Cryptology

ok thiik.....per Q???
aisa q kerte hain?:cc:

takey apney ............. ki baat dosron sey chuppa ker jis tak pohanchani ho , pohanchaney key liya

:D

[Muhammad Khalil]

Re: Course :- Cryptology

OHo nahi huwa muj sy.....kuch theek nahi hu raha hay

[tauruskhan]

Re: Course :- Cryptology

OHo nahi huwa muj sy.....kuch theek nahi hu raha hay

kia theek naeen hoa app sey

[Muhammad Khalil]

Re: Course :- Cryptology

haisha koi na koi ghalti hu jati hay:(

[Almas]

Re: Course :- Cryptology

bohat zabardast hay...Tauras G!:)

main hamesha say codes crack karna chahti thi...and its veryyyy interesting aur aap nay bohat achay tareeqay say samjhaya hay!:)

[GumShuda]

Re: Course :- Cryptology

bohat zabardast hay...Tauras G!:)

main hamesha say codes crack karna chahti thi...and its veryyyy interesting aur aap nay bohat achay tareeqay say samjhaya hay!:)

Aunty g ap insanooN ko crack karti ho itna kam nahi hai kia jo ab codes ko bi crack karnay lag gain :kr:

[max_baba121]

Re: Course :- Cryptology

Assalam_0_Alaikum
bhai Ji Aei Sussra hey Kiya Cheez?
Hamar Chirya Jesi Khopariya Main Kuch Aaya Nahi??
But Thannx Ur Post Thnxx Alot keep it up.....
May Allah bless u...

[GumShuda]

Re: Course :- Cryptology

Walaikumsalam
Max_Baba yahan per achi wali zubaan boli jati hai. Manners mein rah kar , Jaisay hum apnay ghar walooN kay samnay boltay hain waisay hi yahan bi baat karain. Yeh bi ek ghar hai aur yahan per bi humari ek family hai.
Wasalam