If you’ve ever heard a dev say, “Don’t worry, we use encryption,” and your eyebrows twitched involuntarily… welcome. You know that crypto done wrong is worse than no crypto at all.

Penetration testing cryptographic implementations isn’t about breaking AES like you’re in a spy movie. It’s about finding how developers misused good crypto and exploiting those mistakes like a polite (but curious) burglar.

Let’s dive into how pen testers assess crypto in the wild — and why it matters more than ever.

When we say “cryptographic implementations,” we’re not testing the math (spoiler: you won’t crack AES-256 on your laptop), we’re testing the usage:

• Is the crypto being used securely?
• Is it implemented correctly?
• Is it protecting what it’s supposed to?

You’re looking for leaky logic, not leaky algorithms.

Let’s break down the usual suspects:

1. Hardcoded Secrets

secret_key = "supersecure123"