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challenges/crypto/Messenger/README.md

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+# Messenger
+With your new title, you are now ready for a more challenging quest. A letter has been discovered that contains a riddle with an encrypted message
+"The key is required to understand the message that has been decoded by a symmetric method known for its fixed block size. The key itself holds the value of a valuable find, something akin to a hidden treasure."
+Message: 964lCv5sFqsdip50KeyCkg==
+
+Are you able to discover what does the encrypted message mean?
+
+## Summary
+ - **Author:** Valerie Lim
+ - **Discord Username:** hisumirosa
+ - **Category:** Cryptography
+ - **Difficulty:** Medium
+
+## Hints
+ 1)  The block cipher symmetric-key has a key length of 56 bits
+ 2)  Still stuck on what's the key? Try treasure
+
+## Flag
+HEX{CH3CK_CH3ST}