$ cat writeup.md…
$ cat writeup.md…
ringzer0ctf
Task: three files — an encrypted ZipCrypto archive, its known plaintext, and a second ZipCrypto archive (flag) sharing the same password. Solution: run bkcrack's known-plaintext attack to recover the three internal key words, then reuse those password-equivalent keys to decrypt the second archive without ever recovering the password string.
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