How do I unlock a PDF file that is encrypted in a very strong way?
Other answers discuss how to unlock a PDF which has been locked using the PDF app built-in locking methods. Since there are readily available methods for circumventing that lock it clearly is not a very good lock. If instead the creator was actually s erious italic about protecting the file (you did say in a very strong way) they would have used something like AES to actually encrypt italic the file totally independent of the PDF app (AESes with every Mac; not sure about Windows boxes). In that case either you have the proper password or you don get to see the contents of the file. Period.
How do I secure PDF files?
The best way to secure PDF files is to encrypt those using passwords. There are many softwares available for this purpose but I would like to suggest you the one that is quite easy to use PDF encryption tool. We call it HiPDF and in just few simple steps you can protect a PDF file s with a password. So here is what you need to do Go to the official website of HiPDF and select Protect PDF tool . Once the online tool window is open you need to select the PDF file that you want to encrypt. As soon as the file is uploaded to the online tool interface you will be provided with an option to set password for the PDF file. Once you are done with entering the password for the PDF simple click on Encrypt button. In just a couple of seconds the file will be processed and an encrypted PDF will be available for download.
Email Security: How can I send an email so that nobody can monitor it?
You are right in assuming you cannot trust an infrastructure you can't control or audit. If you want privacy (protect the content of your mail from being read by a third party) what you need is encryption and you should use good algorithms with large keys implemented as free software running on aputer you run and protect from threats. Asymmetric cryptography based on PGP is a very good tool for that job and thunderbird + enigmail is a good portable and free software that implement that. If you want to achieve is anonymity (make it impossible to trace the message back to you) it is a bit trickier. Don't trust any anonymous email service on the regular web you can have no certainty about their efficiency. You can consider the few e-mail providers that can only be accessed as a tor hidden services (almost always using webmail interfaces). You don't really have to trust the service for it to be anonymous (accessing as a tor hidden service offers a rather strong anonymity even against the service itself) but those providers just tend not to be very reliable. A weaker option would be to use a regular email service and access it through tor (if it is not blocked) or (even less secure) a VPN. Those two approaches can bebined of course. If you send a well encrypted mail through a Tor mail service it can be both private and anonymous.
What are some video encryption software for video protection in viewing?
Recordshield is renowned software for free video encryption s and video piracy protection. Recordshield would be the best solution for coaching classes and business deals in video making and its sale. It encrypts videos and distributes via pendrive DVD and cloud. It provides features like limited access protects screen capture makes them expire for certain views and watermarking for sharing the video.
Is there any freeware for Windows that lets me edit a PDF document?
For editing PDF you have 3 way to do that. 1. Open PDF Files with Word (Ms. Office 213) Now with Office 213 or newer you open and edit PDF Files. n2. Convert it to Ms. Word files first. You can convert you PDF files to Word first using Free PDF Converter and convert back again to PDF. . Editing directly from PDF file. You can also edit PDF online via PDFescape it's free but some feature need to unlock by pay subscription. I have try using all of this but the perfect ONE for me is ABBYY PDF Transformer+ citation target s title s index 1 unique_id XryMk .
What ECCN number matches a simple mobile app whose only use of encryption is use of HTTPS?
Onement on Mark's very thorough answer The US ECCN of software with HTTPS can vary not just based on the functionality but also on how it's distributed. If it's mass market software (as most mobile apps are) the US ECCN would be 5D992.c which is less restrictive than ECCN 5D2 but more restrictive than of 5D992.c software have to file a one-time registration and submit an annual submit list of software their self-classified software (both can be done electronically).nAs Mark indicated though the US BIS website is the best resource (here's their page dedicated to the mass-market controls) Fortunately in many countries (including Canada and the UK) mass-market software isn't considered controlled technology at all. But in any jurisdiction I don't rmend making that determination yourself; it's best to consult an expert who can carefully review your particular software.