Update README.md

Author: Git-Logan

crypto/inDEStructible/README.md

@@ -3,6 +3,9 @@
 ## Challenge Text
 * It's an older code, sir or madam, but it checks out.
 
+## Hint
+* https://github.com/RobinDavid/pydes
+
 ## Solution
 * Find a DES encryption implementation in your language of choice and start bruteforcing keys (keyspace is 2^56, but the key is going to be < 2^22 so it shouldn't take more than 30 min to bruteforce).
 * The exact key was generated by taking the string 'sw' (29559 as an int) and converting it to binary, padded (pre-pending 0s) to 56-bits, and used directly as a key without the permutation.