OneKey Keytag is the powerful wallet backup kit made of aircraft-grade titanium alloy, with 2 KeyTag included.
Material
KeyTag is made of aerospace-grade TC4 titanium alloy, which has a melting point of 1668 degrees Celsius, seven times that of tin and 2.5 times that of aluminum, making it resistant to most high-temperature situations.*Equivalent to 3034 degrees Fahrenheit. Compared with backup plates made of stainless steel and other materials, titanium has absolute advantages.
Advantages
- Waterproof; Resistant to acid and alkali, chemical corrosion; Resistant to extreme high and low temperatures; Unobtrusive; Self-encrypting;
- Able to record 24 recovery phrases and 2 extra passphrases.
Principle
- When we create a wallet, we record a set of words called recovery phrases. In the BIP39 universal protocol, all the wallet recovery phrases are generated from the BIP39 Wordlist. This alphabetical list contains 2048 words, with each of them having its own number.
- Instead of letters and words, KeyTag smartly help users to record the number of each recovery phrase. Each KeyTag has one extra row for passphrases.
How to record
- Each row of KeyTag represents a single word. The "1, 2, 3,...11, 12" marked on the KeyTag represents the order of recovery phrases.
- The "*" line can be used to backup the Passphrase as needed.
Look up each word of your recovery phrases in the provided printed word list and punch a dot accordingly on the KeyTag for each black filled circle on the list.
The word list can also be found in github: https://github.com/OneKeyHQ/bip39-dotmap
How to read
The following will explain how the punching position of each word is obtained.
- In the BIP39 word list, the 2048 words are arranged in alphabetical order, and each word has its own number.
- Taking the word "one" as an example, its number is 1238 (it is the 1238th word in the word list).
- The "2048, 1024, 512, 256,...,4, 2, 1" marked on the KeyTag represents the binary sequence.
- 1238 = 1024 + 128 + 64 + 16 + 4 + 2, and the numbers that appear represent the positions of the black dots in the table. Find the positions of these numbers on the KeyTag and punch the holes accordingly.
That is, total the numbers in each row, the total of each row indicates the word's number in the word list. Once you get all the numbers, you get all the recovery phrases.
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