Chaindeck is a physical cryptographic system. It is a deck cipher  made of 100 durable square cards. Each card’s edges align to let you record a secret phrase along the four sides of the deck , then conceal it by changing the deck’s arrangement (i.e. shuffling the cards). The product includes everything needed to set up the deck and preserve the phrase for long-term, offline storage. Chaindeck Original comes with a deck of 100 square cards, a deck sleeve (not shown), and inst

At Chaindeck , our goal is to circumvent the limitations of traditional information storage methods. In this post, we dive into some of the features that set Chaindeck apart from traditional paper and metal storage methods , showcasing Chaindeck’s elevated security, convenience, and modularity —attributes that make Chaindeck the ultimate choice for those seeking a new standard in secure information storage. Chaindeck is a deck cipher that takes security to the next level by

One of the best ways to increase the security of your Chaindeck is to utilize False Markings. In this post we'll go over how to best use them to maximize your security. The letters that can be read on this deck are false markings, intended to create "dead ends" and increase security. What are False Markings? After you've completed writing your Secret Phrase to the sides of your deck you'll shuffle the cards. Even after a long and random shuffle you'll notice there will be a

Chaining refers to arranging the cards in a specific order, flip, and rotation. The original chain must be recreated after the cards are shuffled to be able to retrieve the secret phrase in any deck cipher . While the default is to use the PIN method , there are four broad categories of methods for chaining the cards of a Chaindeck . These methods are summarized below. PIN Method Security: Medium | Convenience: Medium This is the default recommended method for chaining the ca

A deck cipher is a deck of cards where each card in the deck can be put into a specific arrangement by the owner. The four sides around the deck are used to hold secret information. Since the sides of the deck where the secret is written is made of the edges of the cards, shuffling the cards “encrypts” the secret. A regular deck of 52 poker sized cards used to store a 12-word seed phrase backup. Same regular deck after shuffling the cards, where the seed phrase backup is ille

Arrow Matrix : The 4x10 table of Direction Arrows. The Arrow Matrix is located at the bottom-half of the cards. Card Number : Every card...

Using the 3-digit PIN, there are 1,000 unique chains available. Owner’s PIN will correspond to one of these. Each of these unique chains...

Chaindeck should be stored inside its tuck box. When possible, it should be stored in a fire and water safe area, such as a safe. It is...

It is important to shuffle the cards in a way that maximizes the randomness of the outcome. The methods used to shuffle a standard...

This post considers the scenario where adversaries gain access to the owner’s Chaindeck and attempt to chain the cards to read the Secret...