Re: [LI] Information on security desired...

[Kumar Cheetan A2 5 WIPRO consultant]

> Date: Tue, 12 Oct 1999 18:08:53 +0530 (IST)
> From: samir agrawal <[EMAIL PROTECTED]>
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> Subject: Re: [LI] Information on security desired...
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> hi,
> your problem set me thinking and thought this should not be that
> difficult. I am not sure something like this exists butI am sure a file
> system withthe following capabilties can be implemented rather easily.
> assuming you are familiar with public key cryptography - simply stated

Ok that is fine, here is my two anana, there is simpler and bit less flexable 
solution as well, user command crypt dir. So even root can  not see the contant 
of file/dir but can delete or move, same will be the case with public key 
option. But this is less flexible as only you have to crypt the dir unlike 
public key option where the system could do the encryption with ur public key. 

-Chetan S

> there are two keys, one public known to everybody and a private one only
> known to you. the nice thing is that they are symmetric in the sense that
> messages encrypted with your public key can only be decrypted using your
> private key only and vice versa.
> 
> so here is my idea.
> 
> 1. Give every user a public and private key.
> 
> 2. All data on the disk belonging to a user is encrypted using his public
> key.
> 
> 3. when a user wants to access a file he will need his private key to
> access it.
> 
> now there are issues related to key management, like how are sessions and
> session key managed so that the root or some other user get hold of the
> key while you are using it.
> 
> I do not know of an implementation, but I think all this is very much
> possible technically.
> 
> comments !
> 
> samir
> 
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