The enhancement in performance was achieved by providing a fast-path where trades are executed directly by the FPGA under the control of trigger rules processed by the x86 based functions. The latency is reduced further by two additional techniques in the FPGA – inline parsing and pre-emption. As market data enters the switch, the Ethernet frame is parsed serially as bits arrive, allowing partial information to be extracted and matched before the whole frame has been received. Then, instead of waiting until the end of a potential triggering input packet, pre-emption is used to start sending the overhead part of a response which contains the Ethernet, IP, TCP and FIX headers. This allows completion of an outgoing order almost immediately after the end of the triggering market feed packet.Insane stuff. (Via Martin Thompson)
Summary: poor reliability, better latencies, and cheaper (!)
Interviews with 2 New York bike thieves (one bottom feeder, one professional), reviewing the current batch of bicycle locks. Summary: U-locks are good, when used correctly, particularly the Kryptonite New York Lock ($80). On the other hand, Dublin’s recent spate of thefts are largely driven by wide availability of battery-powered angle grinders (thanks Lidl!), which, according to this article, are relatively quiet and extremely fast. :(
I could see some value, perhaps, in a tablet that I share with my wife, where each of us have our own accounts, with independent configurations, apps, and settings. We could each conveniently identify ourselves by our fingerprint. But biometrics cannot, and absolutely must not, be used to authenticate an identity. For authentication, you need a password or passphrase. Something that can be independently chosen, changed, and rotated. […] Once your fingerprint is compromised (and, yes, it almost certainly already is, if you’ve crossed an international border or registered for a driver’s license in most US states), how do you change it? Are you starting to see why this is a really bad idea?
This is a pretty good summary of the salient points from the criminal complaint against Ross William Ulbricht — I’d say it’s pretty bad news for any users of the dodgy site, particularly given this:
“During the 60-day period from May 24, 2013 to July 23, 2013, there were approximately 1,217,218 communications sent between Silk Road users through Silk Road’s private-message system.”According to the complaint, those are now in the FBI’s hands — likely unencrypted.
ouch. some serious slagging here, along with taco science. (BTW we have the same problem with carne asada in Ireland, our taquerias use the cheater method too, sadly)
Levison lost [in secret court against the government’s order]. In a work-around, Levison complied the next day by turning over the private SSL keys as an 11 page printout in 4-point type. The government called the printout “illegible” and the court ordered Levison to provide a more useful electronic copy.Nice try though! Bottom line is they demanded the SSL private key. (via Waxy)
the fantastic French kids’ site is now crowdfunding new work — first off being a German Alphabet part of the site. My kids love their stuff, so — bonne chance!
Links for 2013-10-02
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