When you create a "paste," the server encrypts the title and content using AES-128 in Cipher Block Chaining (CBC) mode.
The first flag is often a lesson in paying attention to server responses. By intentionally corrupting the post parameter—such as deleting or modifying a single character—the application may fail to decrypt or unpad the data. Improper error handling. hacker101 encrypted pastebin
CTF — Hacker101 — Encrypted Pastebin | by Ravid Mazon | CyberX | Medium When you create a "paste," the server encrypts