woutgaze - Slashdot User

Linux 2.6.37 Released 135

Posted by samzenpus on Wednesday January 05, 2011 @04:59PM from the new-and-improved dept.

diegocg writes "Version 2.6.37 of the Linux kernel has been released. This version includes SMP scalability improvements for Ext4 and XFS, the removal of the Big Kernel Lock, support for per-cgroup IO throttling, a networking block device based on top of the Ceph clustered filesystem, several Btrfs improvements, more efficient static probes, perf support to probe modules, LZO compression in the hibernation image, PPP over IPv4 support, several networking microoptimizations and many other small changes, improvements and new drivers for devices like the Brocade BNA 10GB ethernet, Topcliff PCH gigabit, Atheros CARL9170, Atheros AR6003 and RealTek RTL8712U. The fanotify API has also been enabled. See the full changelog for more details."

Entropy Problems For Linux In the Cloud 179

Posted by kdawson on Monday August 03, 2009 @08:29PM from the mehr-Zufälligkeit dept.

CalTrumpet writes "Our research group recently spoke at Black Hat USA on the topic of cloud computing security. One of the interesting outcomes of our research was the discovery that the combination of virtualization technologies and public system images results in a problem for random number generation on guest operating systems. This is especially true for Linux, since its PRNG uses only a small set of entropy-gathering events, and virtual Linux images often generate SSH host keys within seconds of their initial boot. The slides are available; the PRNG vulnerability material begins at slide 63."

Quantum Test Found For Mathematical Undecidability 223

Posted by kdawson on Tuesday December 02, 2008 @02:25PM from the not-to-decide-is-to-decide dept.

KentuckyFC writes "Philosophers have long wondered at the profound link between mathematics and physics, but how deep does this connection go? Pretty deep according to the results of a quantum experiment exploring the nature of mathematical undecidability. Here's how: any logical system must be based on axioms, which are propositions that are defined to be true. A proposition is logically independent from these axioms if it can neither be proved nor disproved from them; mathematicians say it is undecidable. In the experiment, researchers encoded a set of axioms as quantum states. A particular measurement on this system can then be thought of as a proposition which, if undecidable, yields a random result — which is what they found. 'This sheds new light on the (mathematical) origin of quantum randomness in these measurements,' say the researchers (abstract)."

Comment Re:Another 1990s ATM exploit (Score 1) 135

by woutgaze on Tuesday October 25, 2005 @08:26AM (#13870690) Attached to: UK ATM System Could Have Ruined Economy

I've heard of this ATM hack in The Netherlands where you would withdraw an amount of 75 guilders which would be dispensed in 3 notes of 25 guilders each. You could pry out the middle note and after waiting a while the ATM would assume you'd forgotten to take out your cash. It would munch in the two remaining notes and refund your 75 guilders.

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