Cloudflare CTO John Graham-Cumming has successfully cracked and decrypted a 30-year-old ZIP file, and has written a blog post about how he did it. John Graham-Cumming's blog: Cracking an old ZIP file ...

Are you trying to open a password-protected PDF or ZIP file? Then, you already know how frustrating it can be. You try out different tools, and the result is a ...

Zip encryption is vulnerable to known-plaintext attacks. Implementation quality also is an issue; WinZip's is particularly bad. No source, I'm afraid.

Last month I wrote a column in which I discussed my attempts at cracking passwords in a lab environment. I had intended for the blog post to be a thought exercise. I constantly hear people ...

Password-protected ZIP archives are common means of compressing and sharing sets of files—from sensitive documents to malware samples to even malicious files (i.e. phishing "invoices" in emails). But, ...