Or just use hex. > `head -c 20 /dev/random`.unpack("H*").first => "0cc57e2664051b3fd803754fd538b83317c9057f" It's reliably double the length of the input byt

Or just use hex. > `head -c 20 /dev/random`.unpack("H*").first => "0cc57e2664051b3fd803754fd538b83317c9057f" It's reliably double the length of the input byte array, it isn't subject to transcription errors or special character conflicts, and hex conversions exist in every stdlib ever.