Re: FPW compression leaks information - Mailing list pgsql-hackers

From Heikki Linnakangas
Subject Re: FPW compression leaks information
Date
Msg-id 559C0F25.8070305@iki.fi
Whole thread Raw
In response to Re: FPW compression leaks information  (Fujii Masao <masao.fujii@gmail.com>)
Responses Re: FPW compression leaks information
List pgsql-hackers
On 07/07/2015 07:31 PM, Fujii Masao wrote:
> Or another crazy idea is to append "random length" dummy data into
> compressed FPW. Which would make it really hard for an attacker to
> guess the information from WAL location.

It makes the signal more noisy, but you can still mount the same attack 
if you just average it over more iterations. You could perhaps fuzz it 
enough to make the attack impractical, but it doesn't exactly give me a 
warm fuzzy feeling.

- Heikki




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