![]() ![]() Now that we’ve got our entropy we can encode it in to words.įirst of all, we add a checksum to our entropy to help detect errors (making the final sentence more user-friendly). Do not use your programming language’s default “random” function, as the numbers it produces are not random enough for cryptography. # For real world use, you should generate 128 to 256 bits (in a multiple of 32 bits).Ĭaution: Always use a secure random number generator for you entropy. Generate Entropy # - require 'securerandom' # library for generating bytes of entropy bytes = SecureRandom.random_bytes( 16) # 16 bytes = 128 bits (1 byte = 8 bits) entropy = bytes.unpack( "B*").join # convert bytes to a string of bits (base2) puts entropy #=> "1010110111011000110010010010111001001011001001010110001011100001" # Note: For the purposes of the examples on this page, I have actually generated 64 bits of entropy. ![]()
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