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iHiDErikSchierboom
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Remove random references to siblings. (#2183)
* Remove random references to siblings. * Update exercises/simple-cipher/description.md Co-authored-by: Erik Schierboom <[email protected]> * Update exercises/simple-cipher/description.md Co-authored-by: Erik Schierboom <[email protected]>
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exercises/simple-cipher/description.md

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@@ -9,7 +9,7 @@ If anyone wishes to decipher these, and get at their meaning, he must substitute
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—Suetonius, Life of Julius Caesar
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Ciphers are very straight-forward algorithms that allow us to render text less readable while still allowing easy deciphering.
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They are vulnerable to many forms of cryptanalysis, but we are lucky that generally our little sisters are not cryptanalysts.
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They are vulnerable to many forms of cryptanalysis, but Caesar was lucky that his enemies were not cryptanalysts.
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The Caesar Cipher was used for some messages from Julius Caesar that were sent afield.
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Now Caesar knew that the cipher wasn't very good, but he had one ally in that respect: almost nobody could read well.
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## Step 2
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Shift ciphers are no fun though when your kid sister figures it out.
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Shift ciphers quickly cease to be useful when the opposition commander figures them out.
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So instead, let's try using a substitution cipher.
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Try amending the code to allow us to specify a key and use that for the shift distance.
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This is called a substitution cipher.
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Here's an example:
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