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dominicgs

416 karma · joined January 4, 2012

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dominicgs··on Bluetooth 5 Now Available
Bluetooth 5 extends the range and increases the data rate of BLE, but not both at the same time. This will allow you to stream high quality audio over BLE, saving power over regular Bluetooth, but you won't get the range benefit.
dominicgs··on Bluetooth 5 will quadruple the range, double the speed
I still do. The ability to stream music in my kitchen is the reason I bought a 5GHz router.
dominicgs··on Bluetooth 5 will quadruple the range, double the speed
This is really a poor marketing job by the Bluetooth SIG. Bluetooth 4.0 added BLE, the low energy mode, but it didn't change anything about the power usage of existing modes.

BLE is almost and entirely different protocol, albeit implemented on the same chipset, which is running alongside the existing Bluetooth stack on your phone. Nothing in the Bluetooth 4.0 spec reduces the power usage of the Basic Rate and Enhanced Data Rate modes.

dominicgs··on TalkTalk cyber-attack: boy, 15, arrested in Northern Ireland
Samy Kamkar was banned from using a computer for three years in 2006 https://en.wikipedia.org/wiki/Samy_Kamkar#Samy_worm
dominicgs··on Should the first in a queue be served last?
Absolutely, the article presents the problem as trying to minimise the time that an individual wastes in a queue, not the problem of processing all of the people in the shortest time possible.

In the airline example, the airline wants passengers to be at the gate before they begin boarding so that they can start looking for missing passengers as early as possible. I think we see this technique most often used by low cost carriers, and this is one of the many ways that they are able to turn aircraft around so quickly.

dominicgs··on Happy Birthday Monkey Island
I played a lot of games as a pair with friends around that time. I think it was something about liking games that had a story and therefore didn't lend themselves well to taking turns. We even played Quake like this a few times, one person moving the other shooting, even when we could have taken it in turns with a level each.

I also remember arguing with my sister about who got to play Commander Keen one day, so our mum blindfolded one of us and had the other shout directions.

Thanks for reminding me, I had forgotten how much I enjoyed it at the time.

dominicgs··on Malaria vaccine gets 'green light'
I think you make a valid point, although I was able to acquire a course of Chloroquine to cover me for a couple of months at one week's notice, for <£10, whereas the vaccine would need two months for the three initial doses. So maybe it's a practicality argument that I'm making, rather than a financial one.
dominicgs··on Malaria vaccine gets 'green light'
I can't say any of this for certain, and I have no qualifications to back it up, but I would assume that any or all of the following may apply:

1) Cost - if a you only visit an area with a risk of malaria for two weeks every year (which is far more often than most holiday makers), then taking a short course of pills that cost pennies a dose will be cheaper than receiving a vaccine that requires three doses and a booster.

2) Malaria strains - if you've been to multiple places in the world with malaria risk, you may have been given different medication. The first time I went to Cambodia/Vietnam I was given Larium, but the most recent time I took Doxycycline because the NHS no longer recommends Larium for the region. For Iran they recommended Cloroquine, which was significantly cheaper. This vaccine may only fight one strain, leaving you to have to take pills for other destinations anyway.

3) Effectiveness in adults - The article suggests that the vaccine was most effective in children within a given age range, so it may be the case that it simple doesn't work on adults. I have no idea if this is likely or even possible, but it certainly seems plausible to me.

I don't know anything about fighting malaria, but it looks to me like they are giving these vaccines to children to get them through the time when they are most vulnerable, rather than giving them lifelong protection.

dominicgs··on Fist-sized 11M-to-1 gearbox
There is one by Arthur Ganson in the MIT museum[1]. It's part of a great exhibit of fun/quirky machines and there's an interesting video about it on youtube[2].

[1] https://www.youtube.com/watch?v=5q-BH-tvxEg [2] https://www.youtube.com/watch?v=2Rov_Lriqvk

dominicgs··on Mortgages Are About Math
In the UK (I have no experience of this type of finance anywhere else), interest rates improve as your loan to value percentage decreases. If the house increases in value by the time you come to re-mortgage, you're likely to get a better deal.

Again, this doesn't help people who are trying to buy for the first time.

dominicgs··on Ask HN: Which Laptop models would you recommend for a developer using Linux?
I think I may have seen this a couple of times, but it's certainly not constant for me. It may just be my router.

I'm dual booting Ubuntu 15.04 and Windows 8.1 as I support software on both platforms. So I'm suffering from the "reboot twice to get working audio" issue and occasional touchpad problems.

I believe that both will be fixed with kernel 4.1.

dominicgs··on IceStorm: Reverse-Engineered Lattice iCE40 FPGA Bitstream
Also Atmel, although they're either so new to the market or the volume that they ship is so small compared to other manufacturers that they don't appear in any lists that I've seen.

http://www.atmel.com/products/other/field_programmable_gate_...

dominicgs··on Why do pub TVs have a pint glass in the corner?
Would it be possible to detect the transformer noise in the antenna cable? The cable often runs on the outside of buildings, especially older ones.

I thought that they were looking for the IF (intermediate frequency) being fed back up the antenna cable, but I have no source for that information other than "something my dad once said".

In reality, I'm sure it's like road tax, they check the database of addresses without one against a list of people who own a television. I believe all retailers are required to take a name and address when selling televisions.

dominicgs··on The Lack of Open Tooling for FPGAs
Sure, ASICs are always going to beat FPGAs and CPUs in power consumption for the same task, but there are also applications where the ability to update the system far outweigh the power requirements.

Interestingly, SDR is being used for the UK's small scale digital radio station trials this year. Off the shelf SDR hardware appears to be performing well enough at a lower cost than bespoke DAB hardware. Again, this fits in with your base station category.

You're right about timing attacks, I have no idea what I was thinking there. Would they be better for power analysis attacks? I guess if we're concerned about that then we'll end up back at ASICs again.

dominicgs··on The Lack of Open Tooling for FPGAs
I can't speak for OP, but my interest is in signal processing. DSP and FPGAs are a great match and with the boom in software defined radio, having reconfigurable DSP capabilities is extremely useful.

For example, if 802.11b devices had been built using FPGAs, an upgrade to 802.11g could have been an OTA update. Or a new Bluetooth variant emerges (e.g. BLE) and support could be added to computers and phones overnight.

For these applications it's useful to think of an FPGA as a chip that you can patch, upgrade or reconfigure for new applications. However, looking at it from another angle, we can think of it as software that isn't limited by the CPU architecture.

This second category opens up the possibility of crypto algorithms that don't suffer from the timing attacks that they do on the CPU. Or a video codec that can be designed without having to worry about which extensions the CPU supports.

I'm sure there are much better examples and some of these are bad ideas that would work better on a CPU, but hopefully that gives you some ideas.

dominicgs··on The Lack of Open Tooling for FPGAs
I haven't had problems scripting the Altera tools. We use make on Linux to build things for the Daisho project[1]. Or were you thinking of something more advanced than that?

Having said that, I'm 100% in favour of open tools. I think the current tools are one of the biggest barriers to the use of FPGAs. I also think that they cause a lock-in effect for developers, which hurts FPGA adoption as a whole.

[1] https://github.com/mossmann/daisho/blob/master/sw/fpga/targe...

dominicgs··on PizzaHut still serves its first homepage
I was once told that the name was chosen to make it easier to cold call potential customers. Saying "Hi, this is Dave from the Santa Cruz Operation" was designed to fool people in to thinking that it was an internal call from another branch of the same organisation.

I have no idea if this is true, it's probably completely apocryphal, but it's a nice hack if it's true.

dominicgs··on YC Stats Winter 2015
Warning, I'm about to make a couple of massive generalisations...

I would guess that most 40-50 year olds who already have knowledge, contacts and money don't apply to YC, probably because they don't feel that they need it.

I expect that founders at that age are more likely to be coming from a position of experience within their target industry, i.e. solving a problem that they've seen/experienced. They may not be trying to become "X for Y" but solving problem Z that a limited number of clients will pay good money to have solved.

Older founders may have more to risk, so the "go big or go home" model may not be as attractive to them.

As I said, this is a huge generalisation with a lot of guesswork thrown in. I would love to see some more detailed data so that we could draw some conclusions.

dominicgs··on BBC gives children mini-computers in Make it Digital scheme
> Hopefully ARM based rather than AVR

ARM, Freescale and Nordic Semiconductor are partners of the project. While the chip in the photo appears to be Atmel (my eyesight may be failing me here), the material seems to suggest that the design is still being worked out, so an ARM device seems likely.

dominicgs··on SSL Week Means Less Weak SSL
that's right, it's downstairs at the Phoenix. There's a bar down there.
dominicgs··on SSL Week Means Less Weak SSL
We've never filmed or streamed content from DC4420 before, mainly due to the size, venue, and nature of the event.

I think it would be worthwhile asking them to give the presentation again in the future at an event that is set up for filming/streaming. Unfortunately that won't tie up with SSL Week.

dominicgs··on SSL Week Means Less Weak SSL
For people in London on Tuesday (24th Feb), DC4420 will have a talk about Superfish by Marc Rogers and Filippo Valsorda of Cloudflare

Details at http://dc4420.org

dominicgs··on Driverless car review launched by UK government
Aren't the Central, Jubilee and Victoria lines all using ATO already? They carry drivers for doors, emergencies, etc but I thought that the movement of the train was automated.
dominicgs··on KeySweeper – Arduino-based passive wireless keyboard sniffer
Interestingly Microsoft aren't the only manufacturer to use the Nordic chipset for their "proprietary" 2.4GHz keyboards. I believe that Logitech's system is based on the same protocol.

I'm unsure if Logitech keyboard are affected in a similar way, I know that this attack only affects Microsoft keyboards but they may have similar issues.

dominicgs··on Her Task Is to Wean the White House Off Floppy Disks
>so they can't hide malware in the same way that the firmware of USB drives, hard drives, and optical drives can.

There's a reasonable chance that many of these floppy drives are USB devices, so they'll have all of the disadvantages that come with USB drives.

Another approach could be to build a device that sits between a host and a USB drive and verifies that only mass storage operations take place, which should stop some of the badUSB attacks.

dominicgs··on Quake on an oscilloscope
You may be able to achieve this with GNURadio.
dominicgs··on Apple EFI Firmware Security Vulnerabilities
I believe that the two year old Option ROM vulnerability to which this post refers was this one described by Loukas(snare) at Black Hat and Ruxcon 2012: https://www.youtube.com/watch?v=XcFvgAsfdqg

Although I may be wrong, it's certainly a related vulnerability and an interesting presentation to watch. Skip to ~54mins if you just want to see the demo.

dominicgs··on PR2 Very Close to Completing Laundry Cycle
This was my exact thought and it would be even simpler if Monotub[0] or Orbit[1] existed/worked.

I know this is really about AI challenges rather than washing clothes, but the list of steps seems more complex than it needs to be. For example, I already put my dirty clothes straight in to a laundry basket. I don't think I'm ever going to need a robot to scoop them off the floor for me, I can't imagine my time being so valuable that I can't put my shirt in the basket.

[0] http://news.bbc.co.uk/1/hi/business/1740246.stm

[1] http://www.coroflot.com/tiffanyroddis/orbital

dominicgs··on 3% use IE9 and 14% have a disability. Why do we only cater for the former?
A terrible example of relying on colour includes the braille at some Melbourne train stations[1]. It appears that someone directly translated the phrase "Press green button" rather than using left or right.

[1] http://wongm.com/2014/06/asking-vision-impaired-to-push-gree...

dominicgs··on This png encrypts to the same image
He's very enthusiastic about sharing his tricks too. I spent the day hanging out with him at Troopers in March and we spent a lot of time discussing the structure of PDFs.

He's the one behind the file tricks in the journal of POC||GTFO - http://www.exploit-db.com/wp-content/themes/exploit/docs/poc...

In fact, he set a fun challenge - can you produce a PDF file that is different every time it's opened? e.g. a bingo card generator.

The back of his business cards have cut down introductions versions of his posters, so everyone takes something away from meeting him. It's fun watching people decide which one they want.

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