In most cases, the document owner is rarely aware that their passwords have been compromised and if the hacker is smart, the fact that the attack has taken place also might never be discovered. This is because passwords can easily be hacked, stolen or guessed (the majority of passwords are weak and the most popular password is 123456) and once the password has been compromised, the PDF document is no longer secure. Maintaining confidential information or sensitive data in PDF documents with reusable or standard passwords is highly insecure and risky. Unsurprisingly, these same standard passwords are also used in various other business applications, intranets and extranets, e-mail, CRM and other business programs within the organization. A large number of companies continue to employ reusable, standard passwords to password protect PDF files.