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Author Topic: [ANN] Coldkey™ -- Secure cold storage wallet cards  (Read 1170 times)
yogg
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April 11, 2019, 11:27:09 PM
Last edit: September 11, 2019, 12:39:24 PM by yogg
Merited by Xprim777 (25), suchmoon (19), krogothmanhattan (10), LoyceV (8), Mitchell (5), vizique (5), Hox (5), Jcga (3), actmyname (3), 1Dq (3), bones261 (2), Hhampuz (2), polymerbit (2), vapourminer (1), chronicsky (1), minerjones (1), CjMapope (1), bL4nkcode (1), micgoossens (1), teeGUMES (1), idunets (1), ChiBitCTy (1)
 #1

I am happy and proud to introduce Coldkey™ to you.
This project has been secretly taking shape over the last few months and is going forward quite nicely.
We are currently in the late stage of the development of our product. We will be probably able to start shipping sometime in June.

What is Coldkey ?
It is a cold storage wallet card. Each Coldkey is denominated in crypto and comes with that amount loaded onto it's key.
Coldkey cards have several security features that makes them very difficult to counterfeit and tamper with.
Coldkeys cards are also collectibles. Each of them is serialized and authenticable in an unique way.


(an early working prototype)

Authenticable ?
Under that black rectangle on the picture, there is a random string of character that is unique to each Coldkey. It is the AuthKey.
There will be two AuthKeys on each card. One that is printed in plain, and one that is hidden and made with UV.
You can easily check the association of the serial number and the AuthKey on our authentication tool :

https://auth.coldkey.eu
You can try with these data:
Serial : BITCOINTALK-TEST-0
AuthKey : aZ42b321

This way you can verify if the Coldkey card you hold is authentic, and it becomes even more difficult to counterfeit a large amount of Coldkey serial numbers.

Difficult to tamper with ?
Each private key is safely covered by a security hologram sticker.
This hologram is specially made for Coldkey. (Only early prototypes have a generic "SECURE" hologram used for testing)
The Coldkey card is then covered by a plastic layer that is pretty resistant. (> 5000 Taber cycles)
Some of the attack vectors against known collectible coins are not possible with Coldkeys.
The only way to redeem the card is by cutting right through it and peel the holo. The plastic film won't be an issue at that point.
It is equally cruel and cool to have to destroy the item to redeem it tho.


(Original pic uncompressed so you can try out the private key : https://i.imgur.com/R4lPji5.jpg)


(Some UV swag  Cool )

Pictures of prototypes shown at Coinfest UK :
(21 made and distributed during the convention)






We will be releasing loaded cards in batch on a regular basis, without limits in quantities, and occasionally some limited series as well.
Every important announcement regarding Coldkey will be made on this thread, which will also serve as a Reference thread.

Many things are probably missing here.
There is as well many surprises and improvements to come since the Coinfest prototypes.

Please visit our website for more informations : https://www.coldkey.eu

Special thanks to Polymerbit.
They helped us a lot by designing the Coldkey logo and providing a background for our prototypes.
Foreshadowing great collaborations, we are open and looking forward to work with Polymerbit on joint projects in the future !

Thank you very much for reading. We are looking forward to reply to your questions, and all ears about any suggestion you may have. Smiley

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April 11, 2019, 11:27:21 PM
Last edit: June 13, 2019, 11:22:42 AM by yogg
 #2

Reference : (all releases so far)

- Coinfest UK 2019 -> Limited run of 21 cards made, denominated at 0.001BTC & loaded. These were distributed during the convention.
- Genesis Edition -> Limited run of 250 cards, denominated at 0BTC. Sold on the forum. (ANN thread)



Other links :

- Result of tests on Coldkeys : https://bitcointalk.org/index.php?topic=5145343.20

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April 11, 2019, 11:27:26 PM
 #3

(Reserved)

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April 11, 2019, 11:31:30 PM
 #4

This looks amazing yogg! I'm looking forward to seeing this develop and evolve and I know that with you at the helm this will be an awesome product!

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April 11, 2019, 11:31:39 PM
 #5

Congrats. they look great Cheesy

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April 11, 2019, 11:31:44 PM
 #6

Love these YOGG!

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April 11, 2019, 11:32:34 PM
 #7

Looking very cool can already buy-order?

XhomerX10 designed my nice avatar HATs!!!!!  Thanks Bro
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April 11, 2019, 11:34:23 PM
 #8

Awesome product, Good luck on the sales Yogg!
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April 11, 2019, 11:34:58 PM
 #9

Very nice, congrats!

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April 11, 2019, 11:44:15 PM
 #10

This is an absolute beauty. Can't wait to see them in action.

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April 11, 2019, 11:52:27 PM
 #11

I can safely say these are very cool in hand.
I am testing their various properties from build to security qualities.
So far, the verdict is good.
They're VERY well made.

Viz

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April 11, 2019, 11:56:52 PM
 #12

When, how much and both funded/unfunded will be avaible?  
They look pretty promising, I'm pretty eager to see where these lead.
The UV makes it pretty amazing aswell.

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April 12, 2019, 12:14:12 AM
 #13

Love it! Can’t wait to see these in person!
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April 12, 2019, 12:30:14 AM
Merited by polymerbit (2)
 #14

Thank you everyone for your kind words. Smiley
We've been working a lot on this project these last months. It's awesome to see such a great reaction !
Physicals really are one of the best ways to spread crypto around.

Looking very cool can already buy-order?

Thank you !
Unfortunately, not yet but keep an eye open. Smiley
We will probably announce and open pre-orders for our very first edition later in April.

When, how much and both funded/unfunded will be avaible? 

We are looking to start shipping in June, but nothing is set in stone as of now.
They will all be denominated, and carrying that amount.
We don't plan to release denominated "buyer funded" Coldkeys as of now.
So either unloaded "0 BTC" cards, or loaded ones.

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April 12, 2019, 12:52:25 AM
 #15

I too, can vouch for the quality of this product after meeting with Yogg. I witnessed him getting grilled relentlessly from a couple of chaps regarding the security measures and he took it all in his stride and calmy answered everything. The manufacture quality on these is impeccable as well.

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April 12, 2019, 05:13:19 AM
 #16

Gratz, looking realy nice !

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April 12, 2019, 07:04:38 AM
 #17

Really cool product, with plenty of research, attention and ingenuity behind it. Congrats and can’t wait to see them being rolled out .
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April 12, 2019, 08:51:16 AM
 #18

Top job yogg, they look great!

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April 12, 2019, 05:22:17 PM
 #19

Damn looking great!  Shocked

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April 12, 2019, 07:07:27 PM
 #20

It was a pleasure to see them in person at Coinfest!

You did an amazing job!

Look how far you've come. I can't wait to see what is next!

-------

For the record, Yogg was involved in the 10 years of Bitcoin Ann note. He already has experience creating and loading keys.

 

Visit our store at www.polymerbit.com/shop

The loaded 0.005 BTC Northern Cardinal Note is coming tonight at 9PM GMT. 4 PM EST.
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