🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.
## 📋 Pull Request Information
**Original PR:** https://github.com/sobolevn/awesome-cryptography/pull/252
**Author:** [@h4x0r](https://github.com/h4x0r)
**Created:** 4/9/2026
**Status:** 🔄 Open
**Base:** `master` ← **Head:** `add-ecb-penguin`
---
### 📝 Commits (1)
- [`4cf5621`](https://github.com/sobolevn/awesome-cryptography/commit/4cf5621e0040fb7f759f9dfd2f14916d0038cb4d) Add ECB Penguin to Playgrounds
### 📊 Changes
**1 file changed** (+1 additions, -0 deletions)
<details>
<summary>View changed files</summary>
📝 `README.md` (+1 -0)
</details>
### 📄 Description
## What
Adds [ECB Penguin](https://ecb-penguin.securityronin.com/) to the Playgrounds section.
## Why it's awesome
ECB Penguin is a free, interactive, zero-dependency web demo that visually demonstrates why AES-ECB mode is insecure:
- Encrypts Linux Tux with AES-ECB vs AES-GCM side by side — the penguin silhouette is preserved in ECB
- Decrypt with correct/wrong keys — ECB silently fails, GCM detects tampering
- Bit-flip attack demo — flip a ciphertext block and see ECB corrupt one block vs GCM refusing entirely
- Block heatmap overlay showing duplicate ciphertext blocks
- Interactive educational panels: block anatomy, key derivation, ECB vs GCM data flow
- Timeline of real-world attacks (BEAST, Lucky13, POODLE, GoldenDoodle) and why TLS 1.3 mandates GCM
Built with pure WebCrypto API — no dependencies, runs entirely in the browser.
Source: https://github.com/SecurityRonin/ecb-penguin
---
<sub>🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.</sub>
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📋 Pull Request Information
Original PR: https://github.com/sobolevn/awesome-cryptography/pull/252
Author: @h4x0r
Created: 4/9/2026
Status: 🔄 Open
Base:
master← Head:add-ecb-penguin📝 Commits (1)
4cf5621Add ECB Penguin to Playgrounds📊 Changes
1 file changed (+1 additions, -0 deletions)
View changed files
📝
README.md(+1 -0)📄 Description
What
Adds ECB Penguin to the Playgrounds section.
Why it's awesome
ECB Penguin is a free, interactive, zero-dependency web demo that visually demonstrates why AES-ECB mode is insecure:
Built with pure WebCrypto API — no dependencies, runs entirely in the browser.
Source: https://github.com/SecurityRonin/ecb-penguin
🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.