[messaging] Padding

David Leon Gil coruus at gmail.com
Sun Jun 8 15:26:51 PDT 2014

Apologies, I misspoke; Pond does do exponential padding for attachments. (And for people unfamiliar with the Pond codebase, the relevant function is saveEncryptedy in "pond/client/background".)  

(I tend to think 16KiB for messages is a little too small; but this is easily changeable in a custom Pond deployment.)

I'm less clear on whether the way Pond counts box overhead towards block size is the right way to handle it (if overhead ever changes).


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On Sun, Jun 8, 2014 at 3:22 PM, Adam Langley <agl at imperialviolet.org>

> On Sat, Jun 7, 2014 at 10:12 PM, David Leon Gil <coruus at gmail.com> wrote:
>> Q1. Does any publicly available messaging cryptosystem use exponential
>> padding?
> Pond pads to max(p) for some reasonable value of human typed message
> (~15KB). However, attachments don't follow that distribution and are
> padded up to the nearest power of two.
> (You already knew that - just pointing it out for others.)
> Cheers
> -- 
> Adam Langley agl at imperialviolet.org https://www.imperialviolet.org
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