+A decryption key is a secret piece of information, often a string of characters, that transforms encrypted [Ciphertext](/wiki/Ciphertext) back into its original, readable [Plaintext](/wiki/Plaintext). It is essential for accessing data secured by [Encryption](/wiki/Encryption), acting as the unique lock-picker for protected information.
+## See also
+- [Cryptography](/wiki/Cryptography)
+- [Symmetric Key](/wiki/Symmetric_Key)
+- [Asymmetric Key](/wiki/Asymmetric_Key)
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