Re^7: Reverse download protocols

Sorry, but you seem to have not understood me at all.

And he is not alone.

You should perhaps start by telling us which protocol you are taling about. A client asking for a hash sounds like some peer-to-peer file sharing protocol, but rsync also uses a kind of hash. If it is not a common protocol, like HTTP, FTP, rsync, link to the protocol spec.

Then, don't invent new terminology, use the one from the protocol spec.

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

Comment on Re^7: Reverse download protocols

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Re^8: Reverse download protocols by tomasz (Acolyte) on Aug 30, 2021 at 17:49 UTC
Asking with a hash, not for a hash, if we're going that way... I'm surprised to read replies like this here. The question is about possible protocols, devising which is a part of the problem, and you're asking me if I mean HTTP or FTP. Maybe try thinking this way: client has a hypothesis, sends a hash of it to the server. Server confirms. Then the client sends a hash of the hypothesis but reversed to avoid hash collision, and so on until certainty. Of course hashing is just, again, only symbolic here. It would have to be something more intelligent and tailor made for this problem in particular.	[reply]

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Re^8: Reverse download protocols
by tomasz (Acolyte) on Aug 30, 2021 at 17:49 UTC

Asking with a hash, not for a hash, if we're going that way... I'm surprised to read replies like this here. The question is about possible protocols, devising which is a part of the problem, and you're asking me if I mean HTTP or FTP. Maybe try thinking this way: client has a hypothesis, sends a hash of it to the server. Server confirms. Then the client sends a hash of the hypothesis but reversed to avoid hash collision, and so on until certainty. Of course hashing is just, again, only symbolic here. It would have to be something more intelligent and tailor made for this problem in particular.

[reply]