Password Security Seems Easy to Circumvent

I am wanting to place restrictions of accessing and changing a PDF that I want to make downloadable online. I note that sites like [link removed by moderator] seem to make stripping out pdf permissions passwords (document opening passwords are a bit harder to remove) a very simple task. Is there anyway of protecting a PDF so that it can only be cracked by someone who has a bit of IT knowledge, rather than by anyone just googling a website, spending a minute of two on its content and then casually removing the permissions password?

Password protection is not suitable for B2B protection of secure content. You should use secure transmission channels. Greater security comes from certificate security, but this involves each sender and recipient setting up and sharing settings, so not only is the document protected from viewing, its authenticity is provable. In these days of fake invoices to syphon of millions of dollars, authenticity is the larger challenge.

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Bit locker security issues (easy to crack) disk encryption?
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youtube.com/watch?v=0npTlOq6q_0
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Where is your question, sir?
If the question were "is it easy to crack", the answer is "no". Your videos make use of several assumptions and ingredients and permissions that a normal attacker does not have.
"Problem 3" is not clear, please describe what scenario you are talking about.

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Mail cannot send your password securely to the server. You can remove this restriction in the Accounts preferences by setting “Allow insecure authentication”, which could put your password at risk.

I have the same problem.
Late 2012 imac 27", intel i7 core
When I upgraded to Yosemite, suddenly my email account (netvigator POP) gives an error:
Mail cannot send your password securely to the server. You can remove this restriction in the Accounts preferences by setting “Allow insecure authentication”, which could put your password at risk.
I have shut down & restarted mail, but no success. If I select Allow insecure authentication, it works, but that's not a long term fix.
I also have a hotmail POP account enabled, and that is working fine.
What's happening Apple??
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HT1933 I have old email address's I used for iTune music purchases and cannot change password on several old accounts. Now some of the music I purchased I can not download and authorize it on my device. What can I do password security does not match my bi

I have old email address's I used for iTune music purchases and cannot change password on several old accounts. Now some of the music I purchased I can not download and authorize it on my device. What can I do password security does not match my birthdate on two of the accounts. Apple can not send me email with a password authorization on several current accounts that I have with them. How can I contact Apple with this annoying problem I can not fix.

settings - app/iTunes store - sign out and sign back in with your new id.
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You need to contact itunes support.
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When password security-setting dialogue box is opened, the bottom can't be seen or moved

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Hello! I have Adobe Acrobat 9 Professional. I have one question - can I make a PDF file with the following settings
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Password security - set permissions for different users

I am using Abobe Acrobat 9 Pro.
In the HELP menu, there is a security section in the contents, In the overview, it states the following:
"Each security method offers a different set of benefits. However, they all allow you to specify encryption algorithms, select the document components to encrypt, and set permissions for different users."
I would like to know how you can set permissions for different users using Password Security.
I am the only one in the company who has Acrobat 9 Pro and all others have Adobe Reader 8.
I have created a PDF file in Acrobat 9, this file is accessible to anyone with Abobe Reader. I would like to set different permissions for different users. For example, i would like certain individuals to print the document and other individuals to not be allowed to print. Can this be acheived using Password Security?
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I have created a PDF file in Acrobat 9, this file is accessible to
anyone with Abobe Reader. I would like to set different permissions for
different users. For example, i would like certain individuals to print
the document and other individuals to not be allowed to print. Can this
be acheived using Password Security?
No.

Password Security gets lost in portfolio/Low definition printing

Using Acrobat Pro Extended 9.0.0, I created a portfolio and added two PDF files to it (these files were not themselves password protected).
I then used File / Portfolio Properties / Security to apply password security, Encrypt except metadata, open password, permissions password allowing High Resolution printing and no changes finally allowing copying of text.
After completion, I then saved the file and closed acrobat.
Then clicked on secured file to open acrobat and was correctly asked for the opening password.
I then changed to list view, clicked on a file, Saved file from portfolio and saved it.
Clicked on PDF document (within portfolio) and looked at Portfolio properties and the security settings were still displayed.
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Closed acrobat completely.
Clicked on saved document from portfolio and was surprised to find no security settings at all. No opening password, no password for changing document, completely open.
This is a major security hole from what I can see.
Another similar problem. If I secure a PDF document with password security as above, yet with low resolution printing. I can then reopen the secured document and print to an Adobe printer driver creating a new unsecured PDF from my secured document.
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Can someone please tell me how to put together a portfolio without these massive security problems.
Regards
John

Assigning security to a portfolio will not assign security to the individual documents.

PDF password security greyed out while saving a PDF MP Navigator

Hello,
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Thanks,
Jim

A simple way is to flatten the form fields, which converts the field appearances to regular page contents. You can do this with JavaScript or PDF Optimizer (Advanced > PDF Optimizer > Discard Objects > Flatten form fields). A very nice script that adds a custom menu item can be found here: http://www.uvsar.com/projects/acrobat/flattener/

Password Security Seems Easy to Circumvent

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