Coldkey FAQ

What is a “Coldkey” ?

A Coldkey is a unique type of Bitcoin cold storage wallet card. Each Coldkey storage card is made by hand, and features a different artist’s work on a quarterly basis. The cards are released as a series, entitled The History Series. The series started in October, 2019, and prematurely ended in March of 2021. We are back after the pandemic to return and deliver you awesome products! Here is more information about them:

Who makes them ?

The Bitcoin private keys are made in France by the Coldkey CTO, Patrick Cudo, an extremely talented Bitcoin programmer and Entrepreneur. All Bitcoin private keys are created using an air-gapped computer, and are completely destroyed after creation, so there is never any possibility that the Bitcoin, which can be redeemed by peeling the hologram on the card, may be “lost”, or “stolen”.

Why should anyone trust you/Coldkey ?

You can’t, however, Coldkey’s current track record should speak for itself! Loaded Bitcoin Coldkeys have been in production since October of 2019, and there have been no security issues or breaches of private keys. Coldkey cards also have several security features that makes them very difficult to counterfeit and tamper with. There are also already a large number of different types of Coldkeys in the wild, in fact close to 2000 already, holding a total of ~ XXX BTC. Anyways – If you really do not trust Coldkey, then by all means, do not purchase one, it is fine!

How Durable/Secure are Coldkeys ?

Each private key is generated on an air-gapped computer that has never been connected to the internet. The private key is then covered by a specially-made tamper-resistant security hologram sticker that is unique to Coldkey. After initial quality inspection of every card, the private keys/holograms are hand-applied, and then the Coldkey card is laminated/covered by an additional plastic layer that is very resistant. In fact, they are resistant to > 5000 Taber cycles. Taber abrasion is a test to determine a plastics’ resistance to abrasion. Resistance to abrasion is defined as the ability of a material to withstand mechanical action such as rubbing, scraping, or erosion. Abrasion can be difficult to compare but haze variation or weight loss are often evaluated. This means …. ?

Some of the possible attack vectors against known collectible coins are simply not possible with Coldkeys. The only way to redeem the BTC on the card is by cutting right through it and peel the holo. The plastic film won’t be an issue at that point. The private key is a hologram, that can be easily swept by many popular bitcoin wallets, including Mycelium Wallet, Ballet Wallets, and many others.

What makes Coldkey special ?

Coldkeys cards are printed using proprietary technology and are each hand-assembled, and holos applied by the CTO only. Coldkey cards are also very unique collectibles. Each one is individually serialized and authenticable in an unique way. They are made securely, utilizing strict quality-control, and no other parties are involved with the private keys or placement of holograms, as already mentioned. However, this design makes it equally cruel & interesting to have to destroy the item to redeem the Bitcoin under the hologram.