Frequency Analysis/Examples/Substitution Cipher
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Examples of Frequency Analysis
Frequency analysis is often a fruitful technique to use on a substitution cipher.
If such a substitution cipher is applied to English words, then use can be made of the fact that the letter $\text E$ is the most common letter in conventional English.
Sources
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): frequency analysis