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[Rails] Good Random Positive Integer
♦ Written by Frank Rietta
Tonight I needed a quick way to generate a good pseudo random number. The following statement in Ruby will generate a positive integer between 0 and the maximum integer supported on the system.
1
SecureRandom.random_number((2**(0.size*8-2)-1))
Running that 10 times as a test on my system returned:
Frank Rietta is a web application security consultant, software developer, author, and speaker. He is a computer scientist with a Masters in Information Security from the College of Computing at the Georgia Institute of Technology. He teaches about security topics and is a contributor to the security chapter of the 7th edition of the "Fundamentals of Database Systems" textbook published by Addison-Wesley.
