>A hosting service like Mega with the security of Tarsnap that could host and de-duplicate torrents would be very interesting.
Tarsnaps security is based on client-side encryption. They cannot read the plaintext. Therefore if more than one person uploads the same file, they will have two different encrypted versions of the same file, which can not be deduplicated.
You could use convergent encryption, but then users can query each others files.
Tarsnaps security is based on client-side encryption. They cannot read the plaintext. Therefore if more than one person uploads the same file, they will have two different encrypted versions of the same file, which can not be deduplicated.
You could use convergent encryption, but then users can query each others files.