Re: How to download over https

[Dan Purgert <dan@djph.net>]

Pascal Hambourg wrote:
> Le 17/06/2016 21:52, Jochen Spieker a écrit :
>> Pascal Hambourg:
>>>
>>> Hmm. I don't know how SSL works, but HTTPS runs on top of TCP so I doubt
>>> that it cares about IP packet size. The task of splitting the TCP payload
>>> stream into IP packets is done by the TCP layer.
>>
>> Sure, but if your encryption scheme wastes payload in yout packets you
>> have more overhead for TCP/IP headers in each packet.
>
> Why would encryption increase the payload size ?
> Disk encryption with dm-crypt does not (except for the LUKS header).

Because most encryption schemes use a standard blocksize (let's say 64
bytes), and those 'encrypted blocks' do not fit well into the max
payload size of a packet.  

More packets = more overhead.


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