Cisco@NIST Entropy Workshop

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• Background • Ring Oscillators - Introduction • RO-based <strong>Entropy</strong> Source Design Examples • Sample Data • Conditioners • Design Observations, Sampling Challenges © 2012 Cisco and/or its affiliates. All rights reserved. 2

Page 1: Entropy Sources - Practical Designs
Page 5 and 6: • Odd number of NOT gates connect
Page 7 and 8: Jitter standard deviation Boltzmann
Page 9 and 10: RO0 RO1 RO2 …….. ROn XOR “Get
Page 11 and 12: 5ca2 5d86 6996 6996 ac53 8d72 897e
Page 13 and 14: • Most entropy source designs are
Page 15 and 16: • Access to entire conditioner in
Page 17 and 18: Four random input bits 0 1 0 0 1 1
Page 19: Thank you.

Cisco@NIST Entropy Workshop

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