Playfair ciphers yog ib hom thaiv cipher : lub ciphertext ciphertext Ciphertext tseem hu ua encrypted lossis encoded cov ntaub ntawv vim nws muaj daim ntawv ntawm cov ntsiab lus tseem ceeb uas yog nyeem tsis tau los ntawm tib neeg lossis lub khoos phis tawj yam tsis muaj tus lej cim zoo los txiav txim siab nws. … Decryption, tus inverse ntawm encryption, yog cov txheej txheem ntawm tig ciphertext rau hauv cov ntawv nyeem tau. https://en.wikipedia.org › wiki › Ciphertext
Ciphertext - Wikipedia
tus cwj pwm uas hloov ib tus cwj pwm plaintext hauv qhov encryption yuav nyob ntawm ib feem ntawm tus cwj pwm nyob ib sab hauv cov ntawv dawb. … Encryption yog ua tiav siv cov square array ntawm cov cim, tsim los ntawm tus yuam sij encryption.
Tus lej ntawv twg yog qhov thaiv cipher?
Ib thaiv cipher yog ib txoj hauv kev encryption uas siv qhov kev txiav txim siab algorithm nrog rau tus yuam sij symmetric los encrypt ib qho thaiv ntawm cov ntawv nyeem, es tsis yog encrypting ib me ntsis ntawm ib lub sij hawm xws li hauv kwj ciphers. Piv txwv li, ib qho thaiv thaiv cipher, AES, encrypts 128 me ntsis blocks nrog tus yuam sij ntawm qhov ntev tau txiav txim siab: 128, 192, lossis 256 khoom.
Puas yog Caesar Cipher yog block cipher?
Ob lub Caesar cipher thiab cov tsiaj ntawv hloov pauv muaj ib qhov loj ntawm ib qho-tsuas yog ib tus cim tau nkag rau ib zaug.
Playfair cipher txhais li cas?
The Playfair cipher yog a sau cov lej lossis cov txheej txheem sib xyaw ua ke uas yog thawj qhov hloov pauv cipher siv rau kev zais cov ntaub ntawv. Tshaj tawm xyoo 1854, nws koom nrog kev siv cov yuam sij uas npaj cov tsiaj ntawv hauv cov qauv geometric txhawm rau txhawm rau xa cov lus.
Puas hloov qhov cipher ib block cipher?
Block Cipher yog qhov tseem ceeb cipher siv los hloov cov ntawv dawb rau hauv cov ntawv cipher. Nws siv txheej txheem hloov pauv yooj yim lossis qee zaum cov txheej txheem permutation qhov twg thaiv cov ntawv dawb tau hloov nrog cov ntawv cipher me ntsis.
