On sale Billfodl — virtually indestructible storage of the private key or secret phrase to reset the password. The device is an alternative cryptocurrency hardware wallet, and replaces the more usual methods of creating backups of the private key.

It is reported that Billfodl izgotovlen of stainless steel 316. It can withstand temperatures of 1,200 degrees Celsius and almost any other troubles, including immersion in salt water. As stated by the manufacturer, the transcend device electric shock and the private key of the user will be safe even during a nuclear strike.

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