ColdSecure: A Micro SD card
cold storage for Bitcoin

100% offline, 100% durable

ColdSecure

ColdSecure is a Bitcoin cold storage device with private key on a ruggedized micro SD card

License
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100% offline, 100% durable

Like an offline PC, ColdSecure securely generates a Bitcoin private key
and stores it on a ruggedized microSD card

100% OFFLINE
No Wi-Fi, No Bluetooth, No RF. OFFLINE!
NO USB PLUG
Not even a data connector. We said OFFLINE!
OPEN SOURCE
Peer reviews. Compile it yourself for maximum trust
RUGGEDIZED CARD
So much more secure than a paper wallet!
KEYS ON SD CARD
The device doesn't keep any private key
BACKUP KEYS
Store the private keys on two microSD cards

No Wi-Fi, not even a connector, hackers
will have a hard time to break into your device - and the NSA too!

Technical Specifications

To give a rough idea of the capability of the device, it's very similar to the Google Nest thermostat.


HARDWARE:

  • - Texas Instruments ARM Cortex-A8

  • - 512MB LPDDR2 RAM

  • - 256MB Nand (reserved for firmware)

  • - 3.5 inch screen with HVGA resolution

  • - Multi-touch capacitive touchscreen

  • - Front facing VGA color camera

  • - 500mAh polymer battery

  • - Micro SD Card slot


SD CARD:

  • - One rugged "indestructible" micro SD card: survive 24 hours in water, withstand the force of a 1.6 ton vehicle (3,200 pounds), and resist up to 10,000 gauss

  • - A convenient micro SD card holder to avoid losing your cards


SOFTWARE:

  • - 100% open source with Linux kernel & Qt framework

  • - Boot to application in a few seconds

  • - Option to lock the firmware forever

  • - Android 4.x possible though HIGHLY unrecommended

Brief overview of software architecture
ColdSecure is similar to BitSecure with a micro SD card slot
and without the Wi-Fi module
 
 

Licensing for top-tier Players

If you are a top-tier player in the Bitcoin ecosystem or in the "legacy" credit card world, you can license the whole design of ColdSecure with a full technology transfer possible. Feel free to contact us and describe your project / needs.

 

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