Revolutional Secure Angou WriteUp

CTF: TWCTF 2018 CATEGORY: CRYPTO POINTS: 154 This blog post is for discussing the exploit of the challenge Revolutional Secure Angou. We were given the following ruby script When we go through the above code, we can see that the prime q is generated in a different way rather than usual. q = OpenSSL::BN.new(e).mod_inverse(p) On … Continue reading Revolutional Secure Angou WriteUp

CBC Bit-Flipping Attack

This blog post is for the discussion of AES CBC Bit-flipping attack. Firstly, get familiar with the CBC mode of encryption before you go through this attack. Please do refer the below blog post to get an idea about CBC mode. link: CBC mode of encryption This attack is explained with the help of Cryptopals Challenge16 … Continue reading CBC Bit-Flipping Attack