cscamp ctf 2012 - crypto 100

Crypto 100 challenge requires decryption of a given ciphertext.


There is also an input field that takes in a plain text and responds with a ciphertext. By encrypting 'a' and 'A' we see that it provides the same output. Hence the cipher is case insensitive. The following code solves the challenge by generating a table of cipher text for a-z and then decrypts the given ciphertext using the mapping.

cscamp ctf 2012 - web 200

The web200 challenge requires an input which is a solution to an equation.


Also, submitting the answer after sometime results in a "too late" response. Inspecting the HTTP headers, there is a "Set-Cookie" and "EQ" header.


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