![]() ![]() Just four years later however it was cracked by a Russian security engineer working for Elcomsoft. The password and encryption combination became immediately popular, and understandably so it was all businesses had at the time. It wasn’t until 1996 that Adobe released a version that included passwords, and a few years later digital signatures and RC4 encryption. As such, on its release in 1993, the Adobe PDF format didn’t ship with any form of PDF protection. When PDFs were developed in the 1990s, the priority wasn’t security – it was on making the document format as shareable as possible. Below we cover how to password protect PDF files, and the ways that users can easily remove that protection. Some might argue that password protecting PDF files has its uses, but protecting confidential and sensitive business information is not one of them.
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