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I am storing my files on Amazon S3. My problem is that whenever a user asks for a file I want to generate an encryption key (user specific key) and encrypt the file and send it to him.

So basically I want to direct S3 server that I want this file with this key, it generates the url for me, I pass the url to the user and when the user hits this url he/she gets the file encrypted with my key.

I read about the encryption schemes on the S3 docs but couldn't find a way of doing this. All I got is that I can store file with encryption key and to retrieve it back I have to provide the encryption key to S3.

Is there a way of achieving this with S3?

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  • I think you need an instance (or docker instance) to do this, which reads the file, encrypts it, etc.
    – SPRBRN
    Commented Apr 12, 2016 at 7:42
  • @SPRBRN can you please point me how is it going to help me achieve user specific encryption
    – dnit13
    Commented Apr 12, 2016 at 7:52
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    No I can't. You need a web application for that. It should be programmed or maybe you can find an app that can do that. This is just my understanding of S3, and AFAIK it's just a big fileserver, and programs run elsewhere.
    – SPRBRN
    Commented Apr 12, 2016 at 7:56

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No, there isn't.

S3's encryption services are for the data at rest inside, not outside, S3.

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