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Pseudo random
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<blockquote data-quote="Kless" data-source="post: 4644963"><p>For if this can help to somebody, I use a deck of 52 cards to get a</p><p>better randomness. Although it could be used a deck of: number to</p><p>return * 2 (or 3)</p><p></p><p>-----------------------</p><p>def bytes(n=nil)</p><p># The range of possible values to each card is 256 (0-255), the</p><p># maximum length to representing an ASCII character.</p><p></p><p># By default returns 16 bytes (128 bits), a common value in salts</p><p>and IVs.</p><p>n ||= 16</p><p></p><p># Gets 52 cards with values in range 0-255, and then they are</p><p>shuffled.</p><p>cards = (1..52).map { rand(256) }.shuffle</p><p></p><p># Finally gets 'n' cards from the deck, and it is encoded to ASCII.</p><p>(1..n).map { cards[rand(52)] }.pack("C*")</p><p>end</p></blockquote><p></p>
[QUOTE="Kless, post: 4644963"] For if this can help to somebody, I use a deck of 52 cards to get a better randomness. Although it could be used a deck of: number to return * 2 (or 3) ----------------------- def bytes(n=nil) # The range of possible values to each card is 256 (0-255), the # maximum length to representing an ASCII character. # By default returns 16 bytes (128 bits), a common value in salts and IVs. n ||= 16 # Gets 52 cards with values in range 0-255, and then they are shuffled. cards = (1..52).map { rand(256) }.shuffle # Finally gets 'n' cards from the deck, and it is encoded to ASCII. (1..n).map { cards[rand(52)] }.pack("C*") end [/QUOTE]
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