Look elsewhere in this story: I've posted a 2013 paper where using this type of attack it appears that very nearly 100% of your secret key bits can be recovered as you do a single encryption in another process.

Note: not just revealing that I did an encryption, but what the bits of the key were that did it.

*That* seems bad enough to need serious thought (or refutation) ASAP.

Rgds

Damon

Such as this?

https://eprint.iacr.org/2013/4...

"We demonstrate the efficacy of the FLUSH+RELOAD
attack by using it to extract the private encryption keys
from a victim program running GnuPG 1.4.13. We tested
the attack both between two unrelated processes in a sin-
gle operating system and between processes running in
separate virtual machines. On average, the attack is able
to recover 96.7% of the bits of the secret key by observ-
ing a single signature or decryption round"

Rgds

Damon

http://en.wikipedia.org/wiki/N...

[citation provided]

I know someone who can do that right now for appliances, probably previously unseen.

Thus with a big enough incentive (such as getting access to your bank account) the danger is real.

Rgds

Damon

Interesting, thank you.

Given that I no longer see differential pricing in any of my own retail bills, and given remarks from BT execs some time ago that they'd like the differentials to go away, I assumed that they'd gone at wholesale level too.

What ratios are there in the wholesale pricing, eg is it still anything like 4:1 between the highest and lowest by time of day?

Rgds

Damon

It's called 'scarcity pricing' if you want to keep emotion out of it.

Sometimes it's needed to help prevent a service being overwhelmed: our phone calls used to cost 4x more 9am to 1pm than 6pm to 8am because our phone service (government run) had limited available bandwidth. Now that is no longer an issue (largely c/o fibre optics) there is no pricing surcharge for the daytime peak. Nor even for national vs local calls in the UK. It was a premium charge or lots of failed calls, including for those who really had no alternative to using the morning business slot.

Rgds

Damon

HFT *is* constrained by the physical world, eg the speed of light. Been there, helped with the networking for that.

As to relative levels of thuggery between HFT and Uber... I've never used Uber, so I can't say.

Rgds

Damon

Both probably untrue.

Rgds

Damon

60W GLS incandescent bulb left on for a year costs ~£60 in UK prices or £20 if used 8h/d, which is > $22.

That's why we should stop using them.

Rgds

Damon

Yes it is, because you are wasting lots of extra exergy, ie you could be getting the heat you need with far less electricity, leaving the rest for someone else or allowing less upstream resource (nuclear fuel, water, transmission infrastructure) to be consumed for the same outcome.

Rgds

Damon

Exactly my point. The law and justice are not to be confused, but I have reasonable hopes for the latter being served here.

Rgds

Damon

Indeed. We should be targetting microwatts or at most tens of milliwatts not tens of watts. We're talking lazy engineering and insufficiently discerning end-users here.

(I'd like to chat about your stuff off-line, BTW. as part of our public IoT Launchpad project, see sig!)

Rgds

Damon

I think that there is a chance of justice being served in spite of the law here, since it seems fairly clear from the little that I have read that some deceit was going on.

Rgds

Damon

Sorry, the input parser appears to have eaten the post.

My MBA uses much less than 2W with maxed-out RAM in sleep mode.

So 10W is tragic.

Rgds

Damon

I totally agree that life is not that simple, but it seems to be a useful starting point.

Until the real nutcases wrap round the back... %-P

Rgds

Damon

Is there a significant antigen left in this foam?

I know people can be allergic to almost anything, but this looks to me like only relatively simple innocuous compounds remain in the foam.

The point being on the battlefield, what proportion of people would be killed by this from anaphylaxis (say) rather than saved by it?

Rgds

Damon