User manual

Chapter 16

SWCU117A–February 2015–Revised March 2015

Random Number Generator

The true random number generator (TRNG) module provides a true, nondeterministic noise source for the

purpose of generating keys, initialization vectors (IVs), and other random number requirements. The

TRNG is built on 24 ring oscillators that create unpredictable output to feed a complex nonlinear

combinatorial circuit. That post-processing of the output data is required to obtain cryptographically secure

random data. Typical applications might be, but not limited to the following:

• Generation of cryptographic key material

• Generation of initialization vectors

• Generation of cookies and nonces

• Statistical sampling

• Re-try timers in communication protocols

• Noise generation

Topic ........................................................................................................................... Page

16.1 Overview........................................................................................................ 1156

16.2 Block Diagram................................................................................................ 1156

16.3 TRNG Software Reset...................................................................................... 1157

16.4 Interrupt Requests .......................................................................................... 1157

16.5 TRNG Operation Description............................................................................ 1158

16.6 TRNG Low-level Programing Guide................................................................... 1160

16.7 Random Number Generator ............................................................................. 1162

1155

SWCU117A–February 2015–Revised March 2015 Random Number Generator

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