Collaborate Disseminate
Scenario:
In a company there are Raspberry Pis which are connected to its network environment. A person with bad intentions could swap the SD card and replace it by his own which makes the Pi to a “sniffer” or the person could use it in o… Continue reading Protect Raspberry Pi’s physical sd card to be swapped
Is is possible to make one or several range of an sd card partially write protected (for write protecting a single partition for example) or make write access to a part of the nand flash failing while making reading to such a… Continue reading Is it possible to write protect one or several partitions on sd card at hardware level? [on hold]
Here’s a puzzler for you: how do you securely send data from one airgapped computer to another? Sending it over a network is right out, because that’s the entire point of an airgap. A sneakernet is inherently insecure, and you shouldn’t overestimate the security of a station wagon filled with tapes. For his Hackaday Prize entry, [Nick Sayer] has a possible solution. It’s the Sankara Stones from Indiana Jones and the Temple of Doom, or a USB card reader that requires two cards. Either way, it’s an interesting experiment in physical security for data.
The idea behind the Orthrus, …read more
Continue reading Hackaday Prize Entry: Secure Storage on SD Cards
You may still have some luck getting those selfies off of your SD card, even if it will no longer mount on your computer. [HDD Recovery Services] shows us a process to directly access the NAND memory of a faulty micro SD card to recover those precious files you thought about backing up but never got around to.
On a Micro SD card you may have noticed there are two slightly longer pins than the rest. These are VSS and VCC pins. As long as they are not a dead short between the two the SD card controller isn’t completely …read more
Continue reading Recover Your Broken SD Card Selfies by Your Selfie
It’s well-known that buying Flash storage devices from cheap online retailers is fraught with danger. Stories abound of multi-gigabyte drives that turn out to be multi-megabyte ones engineered to falsely report their capacity. So when [Jason Gin] found a source of 64GB Toshiba eMMC chips for only $6 per device he bought a few, but was prepared for disappointment.
To test them, he decided to use an SD card interface. There are minor differences between eMMC and SD, but the interfaces are electrically the same and in most cases an SD controller will happily do business with an eMMC. It …read more
Continue reading Roll Your Own 64GB SD Card From An EMMC Chip
I saw this question about reading a USB stick safely, and it made me wonder about SD and microSD cards. I’ve been told that SD/microSD cards are safer, and that I needn’t worry as much about just plugging one in as I would a USB stick. Is … Continue reading Is there any way to safely examine the contents of an SD card?
An SD card is surely not an enterprise grade storage solution, but single board computers also aren’t just toys anymore. You find them in applications far beyond the educational purpose they have emerged from, and the line between non-critical and critical applications keeps getting blurred.
Laundry notification hacks and arcade machines fail without causing harm. But how about electronic access control, or an automatic pet feeder? Would you rely on the data integrity of a plain micro SD card stuffed into a single board computer to keep your pet fed when you’re on vacation and you back in afterward? After …read more
Continue reading Single Board Revolution: Preventing Flash Memory Corruption
[jamesone111] bought a Transcend WifiSD card, presumably for photography, but it may just have been because he heard that they’re actually tiny Linux servers.
He read a post about these cards on the OpenWRT forums. They’re all a similar configuration of a relatively large amount of memory (compared to the usual embedded computer), a WiFi chip, and an ARM processor running a tiny Linux install. The card acts as a WiFi access point with a little server running on it, and waits for the user to connect to it via a website. It also has a mode where it will connect …read more
Continue reading Transcend Wifi SD Card Is A Tiny Linux Server
I have deleted a video from my SD card six months ago. How much time does it take to fully destroy this video file on the SD card? If I wanted to recover this video, is it possible to recover?
Continue reading how much time does it take to fully destroy a deleted video from SD card?