The best Bitcoin cold storage? - page 8.

ercolinux

legendary

Activity: 938

Merit: 1000

Quote from: mr_garrapata on January 11, 2013, 12:03:25 AM

Why not store your private key in an ATP microSD card and store it in your container?

http://www.atpinc.com/p2-4a.php?sn=00000391

Electronic storage is not intended for long term: electromagnetic fields can wipe out your data, and due to memory cells structure the data can fade if not refreshed in 4-5 years

mr_garrapata

newbie

Activity: 15

Merit: 0

Why not store your private key in an ATP microSD card and store it in your container?

http://www.atpinc.com/p2-4a.php?sn=00000391

bbit

legendary

Activity: 1330

Merit: 1000

Bitcoin

Just make sure its fire proof!

SgtSpike

legendary

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Quote from: Thursday on January 10, 2013, 10:02:03 PM

I thought of the stamp set but every set I found is just the capital letters. Maybe you could do the letters upside down to signify lower case.

You could just do the SHA256 hash of a set of random capital letters/numbers that you want, and use the result as your private key.

Precede the random characters with "SHA256" so you don't forget that's how to use them. Tongue

Thursday

full member

Activity: 150

Merit: 100

Definitely wouldn't recommend a pill capsule with a scroll of paper inside.

Quote from: Thursday on January 10, 2013, 10:02:03 PM

I thought of the stamp set but every set I found is just the capital letters. Maybe you could do the letters upside down to signify lower case.

https://bitcointalksearch.org/topic/m.1429516

Thursday

full member

Activity: 150

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I thought of the stamp set but every set I found is just the capital letters. Maybe you could do the letters upside down to signify lower case.

marcus_of_augustus

legendary

Activity: 3920

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Eadem mutata resurgo

Quote from: Tacticat on January 10, 2013, 03:06:15 PM

I'll take a look at the media safes.

Quote from: franky1 on January 10, 2013, 02:52:47 PM

etch your key onto a small piece of metal and store the metal in a heat proof box.

Do you know how I could etch the key without owning laser etching equiment or similar tools?

Use your noodle? A strip of ally or copper should do fine ....

Google "Letter and Number Stamp Punch"

Edit: Run Linux LiveCD on offline computer, botg.sh https://bitcointalksearch.org/topic/bitcoin-off-the-grid-botg-secure-savings-script-v011-23081 (on a clean USB stick), metal strip, number-letter punch and you're done. Probably as simple, and cheap as you can get, yet effective.

kjj

legendary

Activity: 1302

Merit: 1026

Quote from: Tacticat on January 10, 2013, 03:06:15 PM

I'll take a look at the media safes.

Quote from: franky1 on January 10, 2013, 02:52:47 PM

etch your key onto a small piece of metal and store the metal in a heat proof box.

Do you know how I could etch the key without owning laser etching equiment or similar tools?

http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?storeId=10001&catalogId=10001&langId=-1&productId=2113244

P.S. Laser printer toner makes great masking material, but it may take you a couple of tries to get the bonding step right.

BradZimdack

member

Activity: 87

Merit: 12

For my cold storage, I've used some black granite tile with one of these:

http://www.dremel.com/en-us/tools/Pages/ToolDetail.aspx?pid=290-01

There are few materials more enduring than stone. It won't fade, rust, decay, burn, or dissolve. That engraving tool is cheap and easy to use. It took only a few minutes of practice to get a feel for it, and I can engrave a private key in less than a half hour. Polished granite tile is available at just about any flooring or home improvement store.

Tacticat

full member

Activity: 210

Merit: 100

I'll take a look at the media safes.

Quote from: franky1 on January 10, 2013, 02:52:47 PM

etch your key onto a small piece of metal and store the metal in a heat proof box.

Do you know how I could etch the key without owning laser etching equiment or similar tools?

franky1

legendary

Activity: 4424

Merit: 4794

etch your key onto a small piece of metal and store the metal in a heat proof box.

TangibleCryptography

sr. member

Activity: 476

Merit: 250

Tangible Cryptography LLC

Sure but a fireproof/waterproof media safe/container/chest is probably more secure. Remember that while paper doesn't ignite until around 250C to 300C, it chars and blackens at only 150C. A charred unreadable document still means lost funds. While your metal container may survive the fire it will acts as an oven and destroy the information on the paper in any significant fire.

Even a normal fireproof safe will allow the temp to rise above 150C in a structure fire. Depending on how long and severe the fire is you can lose some or all of the information on a paper documents. Your best bet is a media safe. Since digital media is destroyed at a much lower temp (~50C) these containers are designed to keep the internal temp lower than even "normal" fireproof safes. You can get a fireproof/waterproof media container (with a nearly worthless lock) for $30 to $50.

If you are ultra pranoid get a fireproof/waterproof media container and then put that inside a TL-15 burglary safe.

kangasbros

hero member

Activity: 812

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Do you have the dealextreme link? What about a necklace with some good container?

ercolinux

legendary

Activity: 938

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Quote from: Tacticat on January 10, 2013, 02:04:42 PM

Pros:

- They are airtight and waterproof
- I suppose they would resist a fire if they're good quality
- The paper with the would not deteriorate
- They are small and can be carried around or hidden.
- You can seal them with some varnish and know when they were tampered with.

What do you think?

Nice idea, but not really fire resistant if you use paper wallet. The temperature inside the "bullet" can become of hundreds of °C in case of fire and paper burns at only 230°C and even the small amount of air inside can be enough to start a combustion

Anyway this is one of the most secure way to save a wallet I've seen.

Tacticat

full member

Activity: 210

Merit: 100

I'm planning on getting one of these:

The ones offered on this website are supposedly survival-proof, airtight and also a tad expensive.
http://www.jazebra.com/pill-fob.html

You can get them from Deal Extreme for $1.5 (dunno about the quality) and I've also found this one on amazon (also airtight) for $5
http://www.amazon.com/Waterproof-Airtight-Pill-Holder-Keychain/dp/B0012NL9BI?SubscriptionId=AKIAI3W5KMBCWAZXJLTA&tag=surgeagur-20&linkCode=xm2&camp=2025&creative=165953&creativeASIN=B0012NL9BI

I could generate a key on an offline computer/secure computer and then keep the private key locked in there:

Pros:

- They are airtight and waterproof
- I suppose they would resist a fire if they're good quality
- The paper with the would not deteriorate
- They are small and can be carried around or hidden.
- You can seal them with some varnish and know when they were tampered with.

What do you think?

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