Update README.md

README.md

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-# VigenereCipher
+# VigenereCipher
+The *Vigenere cipher* was named after **Blaise de Vigenère**. It was invented by Giovan Battista Bellaso in 1553 book La cifra  however, the scheme was later misattributed to Blaise de Vigenère in the 19th century, and thus acquired its present name.[citation needed]
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+
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+## History and usage
+
+## Detailed Explanations : How it works?
+
+## Weaknesses
+
+## Example
+
+### Encrypting