Term
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Definition
| the process of encoding a message so that its meaning is not obvious |
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Term
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Definition
| transforming an encrypted message back into its normal, original form |
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Term
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Definition
| A system for encryption and decryption |
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Term
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Definition
| The original form of a message |
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Term
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Definition
| the encrypted form of a message |
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Term
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Definition
| refers to the practice of using encryption to conceal text |
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Term
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Definition
| Someone who studies encryption and encrypted messages, hoping to find the hidden meanings |
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Term
| What's the difference between a cryptographer and a cryptanalyst |
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Definition
| cryptographer works on behalf of a legitimate sender or receiver, whereas a cryptanalyst works on behalf of an unauthorized interceptor |
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Term
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Definition
| the research into and study of encryption and decryption; it includes both cryptography and cryptanalysis |
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Term
| What a cryptanalyst attempts to do...(6) |
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Definition
* attempt to break a single message
* attempt to recognize patterns in encrypted messages, to be able to break subsequent ones by applying a straightforward decryption algorithm
* attempt to infer some meaning without even breaking the encryption, such as noticing an unusual frequency of communication or determining something by whether the communication was short or long
* attempt to deduce the key, in order to break subsequent messages easily
* attempt to find weaknesses in the implementation or environment of use of encryption
* attempt to find general weaknesses in an encryption algorithm, without necessarily having intercepted any messages |
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Term
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Definition
| one letter is exchanged for another |
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Term
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Definition
| the order of the letters is rearranged |
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Term
monoalphabetic cipher
---- OR ---
simple substitution |
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Definition
| use of a correspondence table with which to substitute a character or symbol for each character of the original message |
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Term
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Definition
| each letter is translated to a letter a fixed number of places after it in the alphabet |
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