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Date:   Tue, 28 Feb 2017 16:37:57 -0800
From:   Eric Dumazet <>
To:     Tom Herbert <>
Cc:     Andy Lutomirski <>,
        Willem de Bruijn <>,
        Michael Kerrisk <>,
        netdev <>,
        Willem de Bruijn <>,
        Linux API <>
Subject: Re: [PATCH RFC v2 00/12] socket sendmsg MSG_ZEROCOPY

On Tue, 2017-02-28 at 16:28 -0800, Tom Herbert wrote:

> The Mellanox team working on TLS offload pointed out to us that if
> data is changed for a retransmit then it becomes trivial for someone
> snooping to break the encryption. Sounds pretty scary and it would be
> a shame if we couldn't use zero-copy in that use case :-( Hopefully we
> can find a solution...

Right, this is why offloading encryption over TCP is also hard ;)

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