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RSA Security 4.3 manual Pseudo-RandomNumber Generators PRNGs, Random Numbers

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Random Numbers

Pseudo-Random Number Generators (PRNGs)

Crypto-C provides several pseudo-random number generators that can be seeded via the Intel RNG and used to generate random numbers. The PRNGs in Crypto-C satisfy mathematical tests that measure randomness and are considered cryptographically secure. The Intel RNG can be used to provide a quick, secure seed to a PRNG. Once a PRNG has been seeded, it produces output up to ten thousand times faster than a hardware random number generator. In addition, a PRNG will not fail unless the CPU does. For most applications, using a PRNG that has been randomly seeded by the Intel Random Number Generator will provide the level of security needed, will be faster, and will avoid any potential problems due to hardware failure.

A PRNG should be reseeded at least every 268 bytes of output.

C h a p t e r 3 U s i n g t h e I n t e l R a n d o m N u m b e r G e n e r a t o r

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RSA Security 4.3 manual Pseudo-RandomNumber Generators PRNGs, Random Numbers

Contents

Intel Security Hardware User’s Guide Cryptographic Components for CCrypto-C RSA BSAFE1999 RSA SECURITY INC Copyright Notice001-19001-430-001-000 Chapter ContentsUsing Intel Hardware With Crypto-C OverviewAppendix A Appendix B Appendix C Crypto-C Error CodesIntel Security Hardware Error Codes IndexChapter Intel Hardware Security FeaturesOverview RSA BSAFE Crypto-CInterfaceAdditional Documentation How This Book Is OrganizedHow This Book Is Organized Overview of a Crypto-CHardware Application Overview of a Crypto-CHardware ApplicationThe Six-StepSequence The Six-StepSequenceChapter Algorithm MethodsCrypto-CAlgorithm Methods Using Intel Hardware With Crypto-CAlgorithm Methods Intel Hardware Algorithm MethodsThe Session Chooser The Session ChooserCreating the Session Chooser Creating the Software Chooserif status = B CreateSessionChooser Creating the Hardware ChooserCreating the Session Chooser The Session ChooserHardware Availability Hardware AvailabilityHardware Errors Hardware ErrorsDefinitions A RSA EXTENDED ERRORerrorCode errorMsgHardware Errors Random Numbers Using the Intel Random Number GeneratorChapter Unavailability of Hardware Using the Intel RNGThe Intel Random Number Generator Whitening Hardware ResultsRandom Numbers Pseudo-RandomNumber Generators PRNGsGenerating Random Numbers Generating Random NumbersObtaining a Random Seed from Hardware Step 0 Create the Session ChooserGenerating Random Numbers Step 1 Create an Algorithm ObjectStep 2 Set the Algorithm Object Step 3 Initialize the Random ObjectStep 6a Destroy the Algorithm Object Step 4 Update the Random ObjectStep 5 Generate Random Bytes Step 6 Destroy All ObjectsGenerating Random Numbers Retrieving Hardware Error CodesGenerating Random Numbers in Software Step 6b Free the Session Chooserif status = B SetAlgorithmInfo Step 1 Create an Algorithm ObjectStep 2 Set the Algorithm Object Generating Random NumbersStep 4 Seed the Random Object Step 3 Initialize the Random AlgorithmGenerating Random Numbers break Step 5 Generate Random NumbersStep 6 Destroy all Objects Generating Random NumbersAppendix A Crypto-CError CodesPage Table B-1 Intel Security Hardware Error Codes Intel Security Hardware Error CodesAppendix B Page Appendix C Redistributing the Intel Security DriverRedistributing the Driver Redistributing via a Silent Installsetup -s Redistributing the DriverLocation Files InstalledRedistributing the Driver FileMicrosoft Windows NT Redistributing the Driver via .inf FilesRedistributing the Driver Microsoft Windows 4.Click Start Settings Control PanelRedistributing the Driver 2.Log on to the target system 4.Click Start Settings Control PanelMicrosoft Windows Redistributing the DriverIndex