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3 articles with this tag.
Encrypting with DES twice looks like it should double the key to 112 bits. A meet-in-the-middle attack shows it barely adds one bit of real security, which is why 3DES uses three passes. Learn the attack with runnable Python against real DES.
12 min read
DES never fell to clever math. It fell to a loop: try a key, encrypt a known block, compare, repeat. This post runs that exact loop against real DES, the same one EFF's Deep Crack ran over all 2⁵⁶ keys in 1998.
18 min read
The Data Encryption Standard ruled cryptography for over two decades. Learn how its Feistel network works, why its 56-bit key ultimately doomed it, and why it still matters as the foundation for 3DES and AES.
10 min read
