Cipher Dict (decryption)

Cipher Dict (decryption)


In this mission, you need to convert a nested cipher dictionary to a plain text to according to the following steps. This conversion is opposite to one in Cipher Dict mission.

  1. Starting from top dictionary, take keys and sort them in correct order into a block of digits. Blocks order should be strictly alternated and the first block must be ascending. Check value (dict as well) of each key in its turn to find next block and get new keys to check later in their turns.

  2. Concatenate all founded blocks into single decimal number.

  3. Convert this decimal value into a hexadecimal number and convert the result to string.

The description may be confusing, so let's look at the example.


Input: A cipher data as a dictionary.

Output: An original text as a string.


get_plain({1: {6: {3: {}}},2: {6: {5: {}}, 9: {0: {}, 5: {}}},3: {4: {5: {}}},6: {6: {4: {}}}}) == 'python'
get_plain({1: {1: {8: {8: {8: {0: {0: {1: {3: {9: {6: {},9: {}}}, 6: {2: {0: {}}}}}, 1: {8: {0: {1: {1: {}, 7: {}, 9: {}}, 7: {0: {}, 2: {}, 3: {}}}, 5: {7: {8: {}}}}},2: {1: {0: {2: {2: {}}}}, 4: {8: {9: {0: {}, 5: {}}}}}}}}}}}}) == 'You can read me.'

How it’s used: (It may not be valuable as a cipher, but it will be useful for studying character code conversion and dictionary structure.)

Precondition: The text contain only ASCII symbols >= 32.

Invalid hot key. Each hot key should be unique and valid
Hot keys:
CheckiO Extensions

CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.

In order to install CheckiO client you'll need installed Python (version at least 3.8)

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pip3 install checkio_client

Configure your tool

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checkio install-plugin --chromium

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