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

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

Web Design

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
Programming Languages

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?


Help is highly appreciable

/>

Thanks,

Android

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

Programming Languages
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?
Web Hosting
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
Information Security

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