I have a question about password protecting a pdf. I saw a PDF file which was password protected, I removed the password through some software but I could not copy the text in original, whenever I tried to copy the text, the text converted into garbage (machine codes). Please let me know, how can I apply such kind of security measures on my documents while converting into PDF.
Please let me know if there is a solution to this. Thanks!
THis is an accident or poorly made pdf, not an available security feature