1 / 2

Substitution Ciphers

Substitution Ciphers. Substitute a letter with another letter Caesar Cipher Mono alphabetic Very easy to break Vigenere Cipher Poly alphabetic Took 300 years to break Kasiski Attack Now we know it is easily breakable. Vigenere Cipher Table A B C D E F G H I J K L M N O P

chelsa
Télécharger la présentation

Substitution Ciphers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Substitution Ciphers • Substitute a letter with another letter • Caesar Cipher • Mono alphabetic • Very easy to break • Vigenere Cipher • Poly alphabetic • Took 300 years to break • Kasiski Attack • Now we know it is easily breakable Vigenere Cipher Table A B C D E F G H I J K L M N O P A A B C D E F G H I J K L M N O P B B C D E F G H I J K L M N O P Q C C D E F G H I J K L M N O P Q R D D E F G H I J K L M N O P Q R S E E F G H I J K L M N O P Q R S T F F G H I J K L M N O P Q R S T U G G H I J K L M N O P Q R S T U V H H I J K L M N O P Q R S T U V W I I J K L M N O P Q R S T U V W X J J K L M N O P Q R S T U V W X Y K K L M N O P Q R S T U V W X Y Z

  2. Plaintext: TO BE OR NOT TO BE THAT IS THE QUESTION Keyword: RELATIONS Keyword: RELAT IONSR ELATI ONSRE LATIO NSREL Plaintext: TOBEO RNOTT OBETH ATIST HEQUE STION Ciphertext:KSMEH ZBBLK SMEMP OGAJX SEJCS FLZSY Keyword: RELAT IONSR ELATI ONSRE LATIO NSREL Ciphertext:KSMEH ZBBLK SMEMP OGAJX SEJCS FLZSY Plaintext: TOBEO RNOTT OBETH ATIST HEQUE STION

More Related