Créer un PDF avec mot de passe impossible à hacker depuis IlovePDF

Anything that is on the Internet can be decoded, hacked, cracked. It's just a question of time, effort and resources on the part of the evildoers. The only times your files are safe from digital manipulation is on a computer not conencted to the Internet or turned off, but even then you could just spill coffee on it and ruin your harddrive. There is no ultimate security and you have to live with the probability that some of your files may get misused without you getting paid.

Mylenium

If you can't trust your clients to adhere to contractual obligations and good business practices, a technical solution isn't going to do it, either. I'm fully with @Met1 - if your clients are that scummy, you need better ones and can only turn the current ones off with sending them watermarked low quality images until they actually pay.

Mylenium

It's probably worth looking into third-party tools like 7-Zip. I don't know how secure they are, but it's probably better than PDF password protection.

a). Get paid first. You can send low rez jpg or png comps, then when they've paid for the work you've done, release the pdf version.

b). Get better clients.