Consider a "zero-knowledge" file host such as mega.co.nz. How can one prevent users to upload unencrypted content?



I am wondering how could a zero-knowledge host such as mega.co.nz prevent users to just upload files in clear, and, for example, to discredit the site by uploading a large quantity of illegal material and then telling the authorities.Ideally, the server should refuse unencrypted uploads. However, what's a definition of "unencrypted" that a computer may understand? I guess there's none.It could be that by pure chance, a JPG picture of a giraffe is actually the cyphertext of some other encrypte

Related to : Consider a "zero-knowledge" file host such as mega.co.nz. How can one prevent users to upload unencrypted content?
Looking for ways to prevent users from contributing tasteless content
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For my upcoming social network site, I would like to stop participants from contributing tasteless content (text, pictures, videos, audio). I am devising a mechanism of moderation but I believe soon the amount of content being contributed will outgrow my teams capacity to proof-read. I am looking for ways to automatically handle this.


I understand that one cannot fully achieve this automatically but there must be ways to minimize it. Further, for textual content I would have to build a stop-words database that would evolve gradually but is there one already available with decent amount of words?


I hope there is a comprehensive solution for this

How to build a website that allows clients to upload content and then allow certain users to download that content
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Ok, I ll try to be as concise as possible.


What I want:


I want to build a website that will allow clients to sign up for a small fee and allow them to upload content to their UNIQUE USER FOLDER.
General users will then be able to sign up for free and request to download specific files from various clients (not just one). Administrators will manage all user requests to download clients files. Once approval is given by administrators, an email will be sent to the user stating that they may now login to download the files.
User logs in and in their homepage, the files that they have been approved to download are now visible as a downlo
Prevent users copying Android app content
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I have an android application that helps users to read some books , it is in pdf format.When users choose a book from a list , that book just downloaded from the server and users can read it.


I want to prevent users from copying the pdfs from the app. is it possible?


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Thanks,


How can I prevent spam while letting users email content to their friends?
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I'm working on an app (in PHP & JavaScript) that lets users generate content (short stories), and I want to add in a "email this to your friend" button.


I'm worried, though, that this could be used to send spam.


What are some things I could do to prevent that from happening? I am thinking:


1) The user must confirm their own personal email address before I send it
2) I have a hidden field somewhere that bots would fill in


What else should I do?


Cheers


Any host that ever prevent users from backing up their data
Information Security
Any host that ever prevent users from backing up their data
 
Despite my sadness and anger that hostgator suddenly ban all of my sites, I am impressed by their professionalism of allowing me to download all of my data.
Other hosts are like that? I will really miss hostgator.
So what about bluehost? What about others? Any experience?

Consider a "zero-knowledge" file host such as mega.co.nz. How can one prevent users to upload unencrypted content?
Information Security
I am wondering how could a zero-knowledge host such as mega.co.nz prevent users to just upload files in clear, and, for example, to discredit the site by uploading a large quantity of illegal material and then telling the authorities.Ideally, the server should refuse unencrypted uploads. However, what's a definition of "unencrypted" that a computer may understand? I guess there's none.It could be that by pure chance, a JPG picture of a giraffe is actually the cyphertext of some other encrypte

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