Hacker101: Encrypted Pastebin Fix

The Hacker101 encrypted pastebin teaches you to think like a cryptanalyst: Encryption is not authentication. Without integrity, confidentiality falls apart.

Always wrap raw payloads in code blocks or, better yet, encrypt them. hacker101 encrypted pastebin

: Without a Message Authentication Code (MAC), CBC is vulnerable to bit-flipping and padding oracles. The Hacker101 encrypted pastebin teaches you to think

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. : Without a Message Authentication Code (MAC), CBC

Pn=D(Cn)⊕Cn−1cap P sub n equals cap D open paren cap C sub n close paren circled plus cap C sub n minus 1 end-sub Pncap P sub n nthn raised to the t h power block of plaintext. is the raw block decryption (the "Intermediate State"). Cn−1cap C sub n minus 1 end-sub