New answers tagged

2

I'll be using modern Intel CPUs as an example of hardware. For most other hardware, you can identify bugs, but often you cannot patch it, but only work around it by trying to avoid the buggy behavior. Hardware bugs are identified similarly to the ways bugs are identified in closed source software. Internal audits and reports in the wild are mostly ...


0

The only accepted way to erase data from a hard drive using magnetism is through a process called degaussing, which involves using an extremely powerful electromagnet which alternates its polarity thousands of times a second. It is the changing magnetic field which erases data, not the presence of magnetism itself. A human being cannot rotate a magnet fast ...


0

DiskCryptor will likely not benefit from the hardware FDE stuff on the SSD. The best information I can find is that the drive always encrypts, it's just a question of whether or not the key is password protected, as it should be to actually be relevant. If your BIOS/EFI supports it, you can actually enable it there: Security > Password on boot > HDD ...


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Why aren't hardware R/W switches used to defend hard drives? Because this is a feature in search of a market. This would be a niche market, at best, because software solutions and other products (like WORM media) exist to provide this functionality already. Bottom line, not enough people want it (and would be willing to pay enough to make it ...


0

A drive manufacturer could certainly implement a read-only physical switch by modifying the drive's firmware. As the firmware could have a bug, this wouldn't be as sure-fire as disconnecting wires required for writing to the disk, but, if done carefully, will be very strong. As the implementation would be easy for a drive maker, I have to assume that they ...


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SATA has no separate wires for reading and writing so a pure hardware solution is not possible. You actually have the same problem with Ethernet too: with Fast Ethernet you had separate Tx and Rx (Transmit and Receive) wires and thus could simply built a guaranteed passive network tap by not connecting the Tx lines. With Gigabit Ethernet this is no longer ...


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Well, yes, it's called a switch. Microphones from a hardware perspective are (in the case of electrets, at least) a capacitive component which produces a small current when the membrane moves due to sound. By amplifying this signal you can capture a sound signal. By simply disconnecting the audio line from the mic itself, or just turning off the amplifier ...


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In my opinion for the newer SSD is it better to do a full-zeroing on it with "zero" instead of "random" if you want to destroy al the data! BUT every single write to an SSD damages it slightly. Writing to every single erase block causes them all to be marked in use, which will prevent the drive's GC from functioning properly and performance will suffer. ...


-1

The solution for you does exists I presume - use an onboard memory, better take a look for SoC-integrated memory, btw. the crucial part for memory aquisition or even for cold boot is an ability to ACTUALLY eject a memory or be able to boot from a pendrive, for example. uBoot+NAND will save you, I suppose. Start looking from Cubieboard 1 or 2 as an example of ...


1

Well, when talking about the internals of a computer, Any access point you can access physically without pulling hardware out, so basically anything you can attach a probe-lead to without causing a short. So what can what is not accessible. CPU, this is often only available for sniffing from when using specialized equipment in between the CPU and the ...


7

Short answer: That won't work. You'll need to degauss it, which will render the drive unusable. Long answer: Sure. Get a powerful magnet, put it next to the hard drive, with N facing the drive. Then flip it around so S faces the drive. Then flip it again, then again. Do this a few thousand times a second. If you do it any slower or just put it near the ...


3

Not without opening the hard drive. This magnet reseller tried several magnets on a running hard drive, without any bad results. It would also probably not securely delete your data when holding magnets directly to the platter, altough it may flip some bits.



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