After almost 3 years of work, our small startup launched Chaindeck today! Introducing a new way to store and encrypt seed phrases using a unique deck of cards, completely offline and analog.

Hello r/Bitcoin! About 9 months I made a post about a survey here, and got incredibly useful feedback from helpful redditors. I thought we were really close to launch, but it turned out were still many months away. I am so excited that the time has finally come to make this announcement post. Thank you for everyone who participated in that survey!

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We are Chaindeck, a small startup founded in 2021 with the goal to improve seed-phrase storage security. Just like Bitcoin, we wanted a product that would be accessible to all. Also, we wanted no electronics, no software, nothing hackable… It had to be relatively simple for the owner to set up but require significant time and effort for others to access the information. We are proud to launch our product today that strikes a balance between security and convenience: a meticulously crafted deck of cards that hides your seed phrase in plain sight.

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Chaindeck is a deck of 100 square cards that have been carefully designed so that any 3-digit PIN leads to an arrangement of the cards in a unique but seemingly random way. The Chaindeck instructions walk you through how to use your PIN to order, flip, and rotate each card. You’re then ready to write your seed phrase on the sides of the deck. Shuffling the cards makes the text illegible, encrypting your seed phrase. Simply re-arrange the cards using your PIN to retrieve your seed phrase.

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Chaindeck before shuffling the cards.

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Chaindeck after shuffling the cards.

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Securely storing seed phrases is not an intuitive problem for most people and Bitcoin self-custody significantly increases the stakes in the event that something goes wrong. We are looking forward to your feedback to make Chaindeck and self-custody better for everyone!

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Find out more: www.chaindeck.xyz

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