Password Protect Mp4

Question

Level 2

321 points

Password Protect Mp4

Is there any way to password protect an mp4 file? I need it to be passworded on every computer it goes to, including mine, the original, no work around, no hacks, nothing. If I forget the password its gone sort of idea.

I tried creating a disk image that was encrypted but after un-mounting it and trying to remount, it wasn't asking for the password I set. I am also wary of the fact that I don't believe disk images are as safe as I could get.

Any ideas?

Regards

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Posted on Feb 22, 2009 3:26 PM

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Answer 1

red_menace

Level 6

17,072 points

Feb 22, 2009 4:29 PM in response to alex.lyons

It sounds like you had Disk Utility set to remember the password in your keychain. If the password is set in the keychain, the system already has it, so it won't ask. Other users won't have the password in their keychain of course, but if you don't want it in yours either, then uncheck the option (or remove the entry using the Keychain Access utility).

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Answer 2

thomas_r.

Level 7

32,031 points

Feb 22, 2009 3:51 PM in response to alex.lyons

I have the feeling the answer is going to be "No," although I'm not sure, so I'll let someone else give a more definitive answer. However, on the topic of disk images, you could put it on an encrypted disk image, and it would require a password to open the disk image. However, once open, the user could simply copy the mp4 off and pass it around to their friends all they want. I'm assuming that's something you're trying to prevent.

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Answer 3

alex.lyons Author

Level 2

321 points

Feb 22, 2009 3:58 PM in response to thomas_r.

Ye sort of. It is more a matter of who sees it when. The people I will be giving it to will not be in contact with each other. For example if person A gets it, I don't care who sees it that much, but would prefer it to still require the password. If they give it to everybody they know, Person B won't get it before I want them to, in theory 😉 Although the internet is crazy, but its not overly confidential, I'd still like to be able to do it.

I tried the encrypted disk image but when I tried to mount it, it didn't ask for the password. I would prefer not to use disk images.

Regards

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Answer 4

thomas_r.

Level 7

32,031 points

Feb 22, 2009 4:34 PM in response to alex.lyons

You must not have done something right with the disk image... I use encrypted disk images all the time. Did you make sure the image wasn't already mounted before you tried opening the image file?

If you'd rather not use disk images, as someone else said, zip provides password protection as well. However, I think we'd be able to advise you better if we understood better what you're trying to do. It seems odd that you want it password protected but don't seem very concerned by the possibility of people redistributing unprotected files. What exactly is the problem you're trying to solve?

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Answer 5

alex.lyons Author

Level 2

321 points

Feb 23, 2009 10:10 AM in response to thomas_r.

As I said in my second post, I want it password protected on my computer and also on anyone else's as well. This is due to the person A and be scenario. Person A & B both have access to my computer but they don't know each other and would never give the other the file. I need it protected so that if I want A to have the file, he can have it but I know that B still can't get it as there is a password on it.

How would I go about using terminal to protect a zip?

Regards

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Answer 6

red_menace

Level 6

17,072 points

Feb 23, 2009 10:40 AM in response to alex.lyons

They aren't using your account, are they? Although this isn't a very good idea (especially if it is an admin account), if the password for the encrypted disk image is not saved in your keychain then you will be prompted for the password.

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