Category Archives: Security

[OverTheWire] Krypton Level 2

So, it’s level 2 on Krypton Wargame, today we’ll work with substitution cipher, the Caesar Cipher.

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[OverTheWire] Krypton Level 1

For this level, it’s fairly introductory, we’re supposed to work with substitution cipher – which is characters are replaced with other characters or with symboles – the ROT13 as an example.

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[OverTheWire] Krypton Level 0

The 1st level from Krypton Wargame is simple and easy, we need only to decode a Base64 password to get access to the next level.

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[OverTheWire] Krypton Wargame

Recently, I started playing Krypton Wargame from the guys over at OverTheWire, this wargame cares knowledge on the science of encrypting and decrypting data (cryptography).

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[Project] The Polybius Square Encipher/Decipher

A Polybius Square is a table that allows someone to translate letters into numbers. To give a small level of encryption, this table can be randomized and shared with the recipient. In order to fit the 26 letters of the alphabet into the 25 spots created by the table, the letters V and W are usually combined.

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