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Another vintage machine that caught our eye this week was a Commodore 64, gutted for use as a keyboard.The user is an outfit called SteelOwl which offers a “room adventure” in Philadelphia, USA. The aim of this meatspace game is to escape from a room by solving several puzzles that dwell within, one of which requires players “to enter in clues they find on VHS tapes in a pretend 1980s video store.”The application isn't running on the C64, but the old machine's chassis is intact so it feel like players are bashing away at the machine's much-better-than-a-ZX-Spectrum keyboard.Steelowl's obtained a USB adapter for the C64 from Britain's Tynemouth Software which charges 40 quid for the kit, in case others out there fancy pressing a C64 into service. Tynemouth Software claim their kit can even connect a Commodore 16 keyboard. The Commodore what? The 16 was the heir to the Vic 20, but flopped just about everywhere. Wikipedia claims the machine went on to be Big in Hungary, a market Commodore chose as a dumping ground for the computer,
But we digress. If you've something older, or odder, than Ed's Tandy 102 let me know and you may appear in a future edition of Runtime. Or use that link to suggest a better name for this column. We considered “Uptime Funk”, FWIW. Israeli security researchers have been able to extract encryption keys from a nearby computer by analysing stray electromagnetic radiation.The attack by computer scientists from Tel Aviv University shows that TEMPEST-style side channel attacks are no longer just the preserve of Mission Impossible and three-letter spy agencies.In a paper, titled ECDH Key-Extraction via Low-Bandwidth Electromagnetic Attacks on PCs, the researchers demonstrate how secret decryption keys in applications using the libgcrypt11 library might be harvested.We show that the secret decryption keys can be extracted from PCs running the the ECDH encryption algorithm, using the electromagnetic emanations generated during the decryption process. By measuring the target's electromagnetic emanations, the attack extracts the secret decryption key within seconds, from a target located in an adjacent room across a wall.
ECDH (Elliptic Curve Diffie Hellman) is a standard public-key encryption algorithm used in OpenPGP, as specified in RFC 6637 and NIST SP800-56A. We attacked the ECDH implementation of GnuPG's libgcrypt 1.6.3 (the latest version at the time the paper was written). The attack asks for decryption of a single carefully-chosen ciphertext, iterated a few dozen times, and then uses time-frequency signal analysis techniques in order to extract from the electromagnetic leakage emitted by the target laptop during execution of ECDH decryptions.
The attack rig includes an antenna on a stand, amplifiers, software-defined radio (white box) and an analysis computer. Naturally enough, a lot of digital signal processing and number crunching is involved.The researchers (Daniel Genkin, Lev Pachmanov, Itamar Pipman and Eran Tromer) are due to present their findings in full at the upcoming RSA Conference in San Francisco on 3 March. Security conscious computer users are advised to update their libgcrypt11 packages, something that is already happening. For example, an update for Linux distro Debian can be found here.Many encryption packages on Windows or Macs do not support ECDH, rendering the attack irrelevant. Updates for packages that do support ECDH are already available.Other cryptographic schemes, running on PC-class computers, are also potentially vulnerable to side-channel attacks, the researchers warn. The Israeli team has already demonstrated hacks against RSA and ElGamal, other encryption schemes. More on the Israeli team's previous work can be found in our previous story here.

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Unknown and unseen to most users, your smartphone is “talking” in its sleep, and that can sap your battery.The problem? Routing advertisements, one of the fundamental operating principles of the Internet, can demand enough communications to have a noticeable impact on battery life.Router advertisements are multicasts that remind the devices they serve what IP address the router's interface is using (in the old IPv4 world, 192.168.0.1, for example). However, when the smartphone receives that advertisement, it has to process it, even if the screen stays dark.Over at the IETF, a Cisco* engineer called Andrew Yourtchenko and Google* researcher Lorenzo Colitti are suggesting ways that sysadmins can lighten the load on users, at least in the IPv6 world.In particular, the authors say the habits of sysadmins in wired networks, where router advertisements might fly around every few seconds, don't translate well to the world of mobile devices.In RFC 7772, the pair lay down the current best practice for configuring systems so that on devices like phones and tablets, router advertisements don't suck more than 2 per cent of a device's power during sleep mode.
They note that “current-generation devices might consume on the order of 5 mA when the main processor is asleep. Upon receiving a packet, they might consume on the order of 200 mA for 250 ms, as the packet causes the main processor to wake up, process the RA, attend to other pending tasks, and then go back to sleep. Thus, on such devices, the cost of receiving one RA will be approximately 0.014 mAh”.That's too high, the RFC contends: to keep to their suggested two per cent power budget, the document says the average power budget for router advertisements has to be kept to 0.1 mA, which equates to the device receiving seven advertisements per hour.The RFC lays out how admins can configure devices to throttle down the frequency of router advertisements, and notes that devices that don't need connectivity while they're asleep should be allowed to disconnect from the network completely.The personal computer market has been in the doldrums for years, with global sales falling under 300 million a year, slipping nine per cent in 2015 alone. But there are also some rays of light in the market, as Intel's predictions of a sales rebound were confirmed by a nice little bump in sales over Christmas, due in part to Windows 10.

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Windows 10 is expected to help the market again this year, as businesses look at the state of their fleets and consider the fact that Microsoft's already ended mainstream support for Windows 7. It's expected that plenty of organisations will look therefore decide 2016's as good a time as any to take the plunge on a new PC fleet, powered by Windows 10.What else will they buy? We asked folks from the top three PC-makers – Dell, Lenovo and HP – what they see as must-haves in a 2016-vintage PC to give you a feel for what you'll be offered.One thing all three companies think you'll want this year is size. Or more specifically, a lack thereof. Towers and mini-towers are now for workstation-wranglers only. The corporate desktop is now margarine-tub-sized affair.That shrinkage has been made possible by three things, the first of which is the demise of optical drives. Nobody needs to load software from disc any more and USB sticks are now the dominant portable data medium. So out goes optical drives and the space they occupy. Disk density helps, too, as a 500GB 2.5-inch drive is now easy to find at decent prices and solid-state disks are also cheap. Whatever storage device you choose, it needs less space than its predecessor, meaning smaller PCs become possible.
Intel's Skylake processors are the third and biggest space-saver, as they run cooler and also boast built-in graphics. By requiring less cooling and removing the need for a graphics card, Skylake means PCs can shrink.Smaller PCs also have manufacturers thinking about what they can do with a shrunken system. Bolting the client to the back of a monitor is now a common trick. Lenovo's taken the idea further with the “TinyOne 23”, a small form factor PC designed to mate with a slot in a matching monitor. The machine, depicted below, is designed to make it easier to maintain and upgrade PCs without quite going all-in with an all-in-one.Which is not to say all-in-ones are dead: all three of the manufacturers we spoke to said they remain at the forefront of their product lines, if only because businesses like the tidiness they bring to public spaces. That can mean kiosk-style environments, labs in schools or reception areas. Wherever those all-in-ones land, they'll boast 24-inch screens because that's now what users expect. And the monitors will have digital interfaces, as will 2016's PCs. VGA is just about dead, since HDMI and DisplayPort have become the norm. 4K is just-about mainstream and will be one reason Thunderbolt appears in more laptops as that interface has the bandwidth required to drive multiple monitors.

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