Tweet
Computer security booming field. Here's why.
-
Myles B. Astor, PhD, Administrator
Senior Editor, Positive-Feedback.com
________________________________________
-Zellaton Plural Evo speakers
-Goldmund Telos 440 and 1000 Nextgen mono amps
-Goldmund Mimesis 37S Nextgen preamplifier
-Doshi EVO and Goldmund PH3.8 phonostage
-VPI Vanquish direct-drive turntable
-VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
-Lyra Atlas SL Lambda, vdh Colibri Master Signature, Mutech Hayabusa,
-Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
-Assorted cables including Skogrand, Kubala-Sosna, Audience FrontRow; Audience FrontRow, Genesis Advanced Technologies , Goldmund and Ensemble Power Cords
-Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz 3 racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA OHIO Class 2.3+ platforms. -
Fascinating. Aside from enhancing my skill set
, I wonder how much of this "leakage" comes into play at smaller levels (not deliberate sabotage or banging on a system) to cause sonic anomalies in recording, mastering or playback. I had the impression that some hardcore folks use Linux, and are heavily encrypted, to avoid backdoors, but don't know enough about the technical inner workings to do more than speculate. I gather that the "secure environment" stuff at the government level is heavily shielded, but if someone can get into an electrical or signal connection, they are "in"- kind of like having a squirrel in the house. It may not know exactly where it is going, but oh, the havoc it wreaks in the process.
I don't often need highly secure environments these days, but when I do, I prefer a quill pen and fleet-footed mercury in powder. -
I'd say it's both scary and amazing. The phenomena has been known and talked about for the last couple of years. Wikipedia has a good description for those wanting a bit more detail: https://en.wikipedia.org/wiki/Row_hammer . Fundamentally, one is seeing the first signs that chip manufacturing is reaching some fundamental limits. The individual memory cells have gotten so small that they store a very small number of electrons to create a "1". The small number of electrons means that the DRAM chips are susceptible to subtle manipulation that can cause errors if one understands how a DRAM works and what access patterns can inadvertently cause those few electrons to leak away.
These unwanted leakage paths couldn't be exploited in the past because there were enough electrons stored in a memory cell that it wasn't possible to disturb the bit. Now that this mechanism has been publicized, most DRAM manufacturers claim that their latest parts have eliminated this problem but I'm not sure that the data supports their claims. Earlier this year I saw a presentation where independent researchers testings so called "improved parts" and the parts still show this problem, even when the manufacturers said it was fixed.
In normal operation, one won't see this effect. One has to intentionally do something that doesn't normally occur when running typical applications on one's computer.
---Gary
Analog: Scheu + Immedia RPM tonearm + Koetsu Black + Pass Xono or Threshold FET 10pe
Amps: First Watt F7, HK Citation II
Pre-Amps: CJ Premier 14, Threshold FET 10e, DIY 417a with output transformer
Speakers: Horning Eufrodite, Reference 3A mm de capo
Tuners: Sansui TU9900, McIntosh MR78
Digital: i7 Server (Roon) + SSD, Sonore urendu + Mutec MC3+ USB + Berkeley Alpha Dac, Audiomeca Mephisto
Power: Audience AR12, Torus Tot, DIY filtersComment
-
Doesn't happen with tubes...
Comment
Comment