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Steganography - Crypto Corner

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Frequency Analysis: Breaking the Code. Combining Monoalphabetic and Simple Transposition Ciphers. Kasiski Analysis: Breaking the Code. Other ways to Alter Fractionated Text. DHM Key Exchange 1. RSA Public Key Crypotgraphy 1. Steganography is the hiding of a message by a physi. Al means. This has been used as a way t. Protect valuable information in many cultures throughout history, and there are many inventive methods that have been used. The first recor. Ed use of Steganography is detailed. Using differ...

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Caesar Shift Cipher - Crypto Corner

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Frequency Analysis: Breaking the Code. Combining Monoalphabetic and Simple Transposition Ciphers. Kasiski Analysis: Breaking the Code. Other ways to Alter Fractionated Text. DHM Key Exchange 1. RSA Public Key Crypotgraphy 1. Suetonius, The Twelve Caesars). Julius Caesar used the Shift Cipher effectively to hide messages from his enemies. This describes what we would now call a shift of 3, and describes the cipher that Caesar used quite well. That is, "a" was encrypted as "D", "b" as "E", etc. The...Page ...

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Homophonic Substitution - Crypto Corner

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Frequency Analysis: Breaking the Code. Combining Monoalphabetic and Simple Transposition Ciphers. Kasiski Analysis: Breaking the Code. Other ways to Alter Fractionated Text. DHM Key Exchange 1. RSA Public Key Crypotgraphy 1. We need to use a key of some form to order the letters of the ciphertext alphabet, and we shall use a keyword like for the Mixed Alphabet Cipher. In a similar way, we use the letters from the keyword first, without repeats, then use the rest of the alphabet. However, we assig...The c...

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Permutation Cipher - Crypto Corner

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Frequency Analysis: Breaking the Code. Combining Monoalphabetic and Simple Transposition Ciphers. Kasiski Analysis: Breaking the Code. Other ways to Alter Fractionated Text. DHM Key Exchange 1. RSA Public Key Crypotgraphy 1. The Permutation Cipher is another form of Transposition Cipher. It is similar to Columnar Transposition. If our set was the {Monday, Tuesday, Wednesday}, then after the permutation is applied we get {Tuesday,Wednesday,Monday}. For sets bigger than the permutation, we apply the permut...

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Introduction to Cryptography - Crypto Corner

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Frequency Analysis: Breaking the Code. Combining Monoalphabetic and Simple Transposition Ciphers. Kasiski Analysis: Breaking the Code. Other ways to Alter Fractionated Text. DHM Key Exchange 1. RSA Public Key Crypotgraphy 1. Coming from the Greek words κρυπτός. Kryptos) meaning "hidden' and -λογία. Logia) denoting "study of' , and hence is the study of hidden writings) is a very broad subject. In its broadest sense, it is split into two sections: Cryptography. Graphein) means "wriring' ) and Steganography.

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Rail Fence Cipher - Crypto Corner

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Frequency Analysis: Breaking the Code. Combining Monoalphabetic and Simple Transposition Ciphers. Kasiski Analysis: Breaking the Code. Other ways to Alter Fractionated Text. DHM Key Exchange 1. RSA Public Key Crypotgraphy 1. The railfence cipher is an easy to apply transposition cipher that jumbles up the order of the letters of a message in a quick convenient way. It also has the security of a key to make it a little bit harder to break. Note that at the end of the message we have inserted two "X"s....

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Columnar Transposition Cipher - Crypto Corner

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Frequency Analysis: Breaking the Code. Combining Monoalphabetic and Simple Transposition Ciphers. Kasiski Analysis: Breaking the Code. Other ways to Alter Fractionated Text. DHM Key Exchange 1. RSA Public Key Crypotgraphy 1. Columnar Transposition involves writing the plaintext out in rows, and then reading the ciphertext off in columns. In its simplest form, it is the Route Cipher. Plaintext written across 5 columns. If we now read down each column we get the ciphertext "ALNISESTITPIMROOPASN". The plain...

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Anagramming: Jumbling words - Crypto Corner

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Frequency Analysis: Breaking the Code. Combining Monoalphabetic and Simple Transposition Ciphers. Kasiski Analysis: Breaking the Code. Other ways to Alter Fractionated Text. DHM Key Exchange 1. RSA Public Key Crypotgraphy 1. I am a weakish speller. Work by jumbling up the order of the letters in the plaintext. Therefore the skill of anagramming is key to the cryptanalysis of intercepts that have been encrypted using a transposition cipher. We get a clue. In breaking those we used Frequency Analysis.

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Conventions in Cryptography - Crypto Corner

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Frequency Analysis: Breaking the Code. Combining Monoalphabetic and Simple Transposition Ciphers. Kasiski Analysis: Breaking the Code. Other ways to Alter Fractionated Text. DHM Key Exchange 1. RSA Public Key Crypotgraphy 1. Throughout the site various cryptgraphic conventions will be used, which are explained here. Is the message that is being encrypted by the. Of the message, and will be written in lowercase letters, and surounded by quotation marks. Is the encrypted message that is actually sent to the.

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Codes and Ciphers - Crypto Corner

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Frequency Analysis: Breaking the Code. Combining Monoalphabetic and Simple Transposition Ciphers. Kasiski Analysis: Breaking the Code. Other ways to Alter Fractionated Text. DHM Key Exchange 1. RSA Public Key Crypotgraphy 1. Cryptography is split into two ways of changing the message systematically to confuse anyone who intercepts it: these are codes and ciphers. Many people believe, and use, the word code to mean the same thing as cipher, but technically they are different.