Here’s Challenge #12 for November 8, 2017.

Today, I wanted to learn about homophonic substitution ciphers. These ciphers aim to thwart frequency analysis by assigning multiple ciphertext symbols to each plaintext symbol. 334 more words

Here’s Challenge #12 for November 8, 2017.

Today, I wanted to learn about homophonic substitution ciphers. These ciphers aim to thwart frequency analysis by assigning multiple ciphertext symbols to each plaintext symbol. 334 more words

Another day, another challenge.

Today’s blog post will explore solving the “Substitute” challenge inside of the PicoCTF.

Let’s get started.

Clicking on the challenge we see the following: 97 more words

**Cryptanalysis** is the study of **ciphers** or **ciphertexts** to find weaknesses in them, which will let/permit the attacker to retrieve the plaintext from the ciphertext (without necessarily knowing the key). 445 more words