|A Bitcoin Audio Key|
But that's not enough for many of the more spy-centric Bitcoin users. As a result, a company known as Sound Wallet has taken encryption to a new extreme by taking a BIP38 encrypted key and converting it to a sound file. The average listener just hears static, but if you use an Android app called AndroSpectro you can dig out the encrypted key from the noise.
That's still not enough for some paranoid users though, as a user called Krach will cut you a 7" vinyl record for the utmost in security. The burst of energy right at the beginning of the record contains the key, but then gradually blends into some harsh electronic music.
I guess you could call this the ultimate safe, since no one would even think to look through ones record collection for their money. Then again, for most of us banks still work OK.
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