Playfair cipher in cryptography| Play fair cipher encryption and decryption example in Hindi скачать в хорошем качестве

Playfair cipher in cryptography| Play fair cipher encryption and decryption example in Hindi

Playfair cipher in cryptography. Let's learn Play fair cipher encryption and decryption example in Hindi.WHAT IS PLAYFAIR CIPHER?? PLAYFAIR CIPHER IS BEST KNOWN MULTIPLE LETTER ENCRYPTION CIPHER, WHICH TREATS DIAGRAPHS IN THE PLAINTEXT AS SINGLE UNITS AND TRANSLATES THESE UNITS INTO CIPHERTEXT DIAGRAPHS. STEP 2 WHAT ARE THE REQUIREMENTS? THE PLAYFAIR CIPHER IS BASED ON THE USE OF A 5X5 MATRIX OF LETTERS CONSTRUCTED USING A KEYWORD. HERE IS AN EXAMPLE, WITH KEYWORD MONARCHY STEP 3WHAT ARE THE RULES? RULE 1: plaintext is encrypted two letters at a time, repeating plaintext letters that are in the same pair are separated with a filler letter such as x, so that balloon would be treated as ba lx lo on RULE 2: two plaintext letters that fall in the same row of matrix are each replaced by the letter to the right, with the first element of the row circularly following the last. RULE 3: two plaintext letters that fall in the same column are each replaced with the letter below, with the above element of the column circularly following the last element. RULE 4: otherwise, each plaintext letter in a pair is replaced by the letter that lies in its own row and column occupied by the other plaintext letter. STEP 4 EXAMPLE LETS TAKE THE KEYWORD ‘MONARCHY’ FOR OUR EXAMPLE. THE TABLE WOULD LOOK LIKE THIS: LETS ENCRYPT THE SENTENCE ‘HELLO SIR’. STEP1: SEPARATE THE SENTENCE IN PAIR OF TWO LETTER, LIKE THIS, HE LX LO SI RX. NOW WHY WE ADDED ‘X’ IN BETWEEN?? BECAUSE ACCORDING TO OUR RULES IF TWO LETTERS ARE REPEATING WE HAVE TO ADD A BUFFER LETTER IN BETWEEN THEM.ALSO IF THE PAIRS ARE NOT COMPLETE THAN AT THE END WE MIGHT NEED TO ADD X. STEP2: NOW REFER THE TABLE FOR EACH PAIR OF LETTERS: FIRST PAIR=‘HE’ LETTERS H & E DON’T LIE IN THE SAME ROW,NOR THE SAME COLUMN. SO WE USE RULE 4 AND REPLACE HE WITH ‘CF’. SECOND PAIR=‘LX’ LETTERS L & X DON’T LIE IN THE SAME ROW,NOR IN THE SAME COLUMN. SO WE USE RULE 4 AND REPLACE LX WITH ‘SU’. THIRD PAIR=‘LO’ LETTERS L & O DON’T LIE IN THE SAME ROW,NOR IN THE SAME COLUMN. SO WE USE RULE 4 AND REPLACE LO WITH ‘PM’. FOURTH PAIR=‘SI’ LETTERS S & I LIE IN THE SAME COLUMN. SO WE USE RULE 3 AND REPLACE SI WITH ‘XS’ FIFTH PAIR=‘RX’ LETTERS R & X DON’T LIE IN THE SAME ROW,NOR IN THE SAME COLUMN. SO WE USE RULE 4 AND REPLACE RX WITH ‘AZ’. SO THIS IS WHAT WILL BE THE ENCRYPTED VERSION OF OUR SENTENCE: PLAIN TEXT: HELLO SIR ENCRYPTED TEXT: CFSUPMXSAZ YOU CAN NEGLECT THE SPACES. THE DECRYPTION CAN BE DONE IN SIMILAR WAY USING THE TABLE, FOLLOWING THE SAME RULES. AFTER DECRYPTION YOU WILL GET BACK THE MESSAGE AS HELXLOSIRX, NOW REMOVE THE ‘X’ AND YOU WILL GET HELLO SIR. Chapters: 0:00-0:58 What is playfair cipher? 0:58-3:09 Requirements of playfair cipher 3:09-5:01 Rules of Playfair cipher 5:01-5:16 Example of Play fair cipher 5:16-9:10 Play fair cipher encryption 9:10-10:02 Play fair cipher Decryption #playfaircipher #play_fair #cryptography THANK YOU!!!! THANK YOU GUYS FOR WATCHING, IF YOU LIKED THIS VIDEO, PLEASE HIT THE LIKE BUTTON AND SUBSCRIBE TO THIS CHANNEL AND SHARE THIS VIDEO. SEE YOU IN THE NEXT ONE.