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Cryptosteel devices – Capsule and Cassette – are the premier backup tools for optimal offline storage of private keys, passwords, and wallet recovery seeds without any third-party involvement.

You can think of them as the mother of all backups. A safe deposit box for your virtual valuables. The one artefact you can hold in your hand that actually protects your digital assets. The DIY equivalent of engraving which is the most proven and reliable method of storing information invented to date.

Our pocket-sized devices are stainless steel tools designed to securely store the important data of your choice with no need for specialised tools or third-party involvement. All of the characters are deeply stamped into the tiles to provide maximum longevity. Codes and passwords are assembled manually from the partly-randomised set of supplied tiles.

Once a desired sequence is locked into any Cryptosteel unit, it essentially gains the status of offline permanence, featuring resistance to physical damage, including fire, flooding, corrosive conditions and impact from accidents.

The Cryptosteel Capsule comes with its own kit of over 800 stainless steel tiles with every printable ASCII character engraved on each side enabling users to save up to 123 characters of information.

Cryptosteel Cassettes are able to store up to 96 characters worth of confidential information, guaranteeing the safety of the data with no need for specialised tools or third-party involvement. The Cassette is available with different letter packs.

You can check out our videos to see both the Cryptosteel Capsule and Cassette in action:

Here’s a video by Cryptosteel customer m1xolyd1an featuring the Cryptosteel Cassette as it comes out of the package: https://www.youtube.com/watch?v=DY2eqLiUOVg

The Cryptosteel Capsule is fireproof up to 1400C/2500F while the Cassette can endure temperatures up to 1200C/2100F better than all other solutions on the market, including top-ranked safes with the UL Class 350 4-hour fire rating.

The Capsule’s parts are made of 100 percent AISI 304 and 303 grade stainless steel while the Cassette is made of 100 percent AISI 304 grade stainless steel to withstand just about anything. In fact, one of our biggest challenges was to design and produce a construction made entirely from these top-grade materials, with no parts whatsoever made of anything else. After all, a solution is only as strong as its weakest element, so we made sure that Cryptosteel has no weak spots.

A Cryptosteel offline storage tool can store all your private sensitive data, regardless of format. Examples include any of the following, as well as most other information you wish to store in a secure manner.

  • BIP39 (unabbreviated 12-word recovery seeds),
  • BIP39 (4-letter abbreviations of 24-word recovery seeds)
  • Shamir Backup SLIP0039 (4-letter abbreviations of 20-word recovery seeds)
  • BIP32 root keys
  • WIF private keys
  • Monero mnemonic seeds (25-word recovery seeds)
  • Random ASCII passwords
  • PINs
  • Insurance account numbers
  • Master passwords to your password manager (e.g. LastPass, KeePass, 1Password)
  • Bank account info and passwords
  • GPS coordinates
  • Poems and haiku
  • Rainbow Codes
  • Elliptic curve coordinates
  • Stuff we haven’t even thought of yet

The recovery seed phrases of most hardware wallet manufacturers follow the BIP39 standard.

The beauty of BIP39 recovery phrases is that you only need to store and access the first four letters of each word. These four-letter sequences are unique and sufficient to recover the full sentence and thus the entire wallet.

Most wallets will suggest the word during the recovery process after you have typed the first four letters. If your wallet does not support auto-completion of seed words you can download the full BIP39 wordlist on Github.

With Cryptosteel, your most sensitive information is both hacker-proof and safe from natural disasters. There is no third party involved in keeping your data safe. And Cryptosteel devices beat paper, wood, and corrosive metals in terms of durability. Unlike space-age materials, however, they are affordable, non-toxic, and hard to detect using next-gen methods of surveillance.

If the creation or storage of your wallet involves a third party agent or tool, it actually isn’t all that safe to begin with. Also, unlike paper and plastic, Cryptosteel device are pretty much everlasting: fireproof, waterproof, stainless and immune to electric charges and magnetic shockwaves. They are also inedible, which one can’t say about a piece of paper, especially when there are cats, toddlers, or parrots in the house.

Can you do your engraving yourself? Do you have the necessary tools and raw materials to etch your data in the highest-grade stainless steel? Can you do it in minutes? Will all this run you less than a new pair of shoes? And if you decide to alter your data, how easy will it be to do it all over again?

Actually, the very idea for Cryptosteel devices combines the permanency and tangibility of engraving with an affordable, DIY format that requires no specialised tools. Engraving is pretty great – it’s just way harder to pull off and a lot more expensive.

As you will discover, there is pretty much nothing that can go wrong. The rule is – if you can write it down, you can protect it using a Cryptosteel device.

If you’ve made an error entering your data, you can always reassemble the tiles to fix your mistake. Just make sure to triple-check before destroying any paper trail. And remember that your seed or passwords should never be sent by email or posted online, either before or after being stored in your device.

In case of loss or theft, the solution will depend on the information stored using the Cryptosteel device and the specifics of your security workflow. If applicable, you should generate a new mnemonic seed using a supported wallet as soon as possible and transfer your coins from the old wallet to the new one.

If you use a device such as a hardware wallet you can protect your sentence with an additional password or use the Shamir Backup option. It is also possible to put a tamper-evident fireproof barrier seal on the Cryptosteel Capsule.

You can use whichever recovery method is supported by your wallet manufacturer. Keep in mind that in most cases you should limit the recovery process to worst-case scenarios, since putting your seed online always makes it a potential target for viruses, keyloggers, and malware.

Find the recovery instructions for some popular hardware wallets here:

Most wallets will suggest the word during the recovery process after you typed the first four letters. If your wallet does not support auto-completion of seed words you can download the full BIP39 wordlist on Github.

With a Cryptosteel device, you no longer need to pay rent on a safe deposit box or trust a bank with your most sensitive information. Nor do you need a wall safe in your home, or an armored cabinet in your office. In fact, you don’t even need a home or an office: Cryptosteel devices are as portable as you are, if the nomadic lifestyle is your thing.

Because they are rust-free, heat-resistant and waterproof, Cryptosteel devices can be concealed nearly anywhere – you can bury them underground or drill a hole into your wall and keep them there. You’ll think of something.

And since they are made of solid stainless steel, they cannot be detected using high-tech scanners. In fact, if you place your Cryptosteel device flush with other steel objects, it will essentially become invisible to metal-detecting technologies.

Just promise you won’t keep your Cryptosteel right next to your computer.

Cryptosteel Cassette is an open source project, which means that all the blueprints are available under a liberal Creative Commons licence.
You can find the Cryptosteel Cassette blueprints here. Cryptosteel Capsule is patent pending.

First of all, that’s unlikely. We make a product people love and we love what we do.

More importantly, all existing Cryptosteel units retain their original utility regardless of our company’s standing. That’s the beauty of Cryptosteel: you alone have access to your private data.

Actually, in the unlikely case that we were to shut down, the only things to change would concern your Lifetime Guarantee and your ability to recommend Cryptosteel to people you know. Like we said, it’s not likely.

Please share your thoughts, ideas, and proposals to our Support Desk. Or, if you prefer, contact us through Facebook or Twitter.

We ship world-wide, using an express and tracked parcel service. Depending on destination it usually takes up to 4-5 days for delivery. Delivery may be delayed by up to 10 working days, due to high demand and ongoing impact of COVID and Brexit on logistics providers. We apologize for any inconvenience and do our best to get back to normal service. Your patience is appreciated.

The price for shipping depends on the destination and chosen shipping method. Please check the shipping options during the checkout process for details on price.

Use our order tracking page to check the status of your order.

Absolutely. It’s our Cryptosteel Lifetime Satisfaction Guarantee, and we mean every word of it. If at any time, for any reason, you wish to return your purchase for a full refund, all you need to do is contact us at Support Desk with the details and you will receive further instructions. We will process your refund as soon as we receive the product or obtain the tracking number for your parcel.

Theoretically, yes. In practice, you’ll find that not a lot can go wrong with something as robust as a Cryptosteel device. However, if you have any special requests or concerns, contact us with the details at Support Desk. We will do our best to troubleshoot the problem or arrange shipping so one of our technicians can inspect your unit and make any adjustments.

That depends on what you have in mind. Contact us with the details at Support Desk, and we’ll get back to you with costs and timing.

It’s exactly what it sounds like: a zero-questions-asked return policy without an end date. So you can enjoy a risk-free trial for as long as you like. This way we can rest assured that all our customers are pleased with their orders.

All Cryptosteel units and parts are made in Poland (Europe). We do not manufacture in China. Working in-house gives us the ability to fine-tune our product in real time. We also get to support the local economy and retain more control over the quality of the product.

Our packaging has been redesigned to prevent tiles from mixing. This early problem has been long fixed and does not affect any units currently in stock.

At the beginning, we featured artwork by Japanese-French artist Rafael Akahira in all of our branding materials. At times we’ve even bundled our product with Akahira’s signed prints. We love the way his style embodies the Cryptosteel spirit while commenting on our times – and so do our customers.

Now we are featuring many other artists, and every series has its own history.

Yes, we have the container for Cryptosteel Capsule in the offer, check here. The package includes no tiles or separators.

Yes, we have the Letter set for Cryptosteel Cassette in the offer, check here. The Cassette is not included.