Part 1: General - Computer Security Resource Center - National ...

March, 2007
5.6 Guidance for Cryptographic Algorithm and Key Size Selection....................................61
5.6.1 Comparable Algorithm Strengths .......................................................................61
5.6.2 Defining Appropriate Algorithm Suites..............................................................65
5.6.3 Using Algorithm Suites.......................................................................................67
5.6.4 Transitioning to New Algorithms and Key Sizes ...............................................68
6 PROTECTION REQUIREMENTS FOR CRYPTOGRAPHIC INFORMATION .........72
6.1 Protection Requirements.................................................................................................72
6.1.1 Summary of Protection Requirements for Cryptographic Keys.........................73
6.1.2 Summary of Protection Requirements for Other Cryptographic or Related
Information .........................................................................................................76
6.2 Protection Mechanisms...................................................................................................78
6.2.1 Protection Mechanisms for Cryptographic Information in Transit.....................79
6.2.1.1 Availability ..........................................................................................79
6.2.1.2 Integrity................................................................................................79
6.2.1.3 Confidentiality .....................................................................................80
6.2.1.4 Association with Usage or Application ...............................................80
6.2.1.5 Association with Other Entities ...........................................................81
6.2.1.6 Association with Other Related Information .......................................81
6.2.2 Protection Mechanisms for Information in Storage............................................81
6.2.2.1 Availability ..........................................................................................81
6.2.2.2 Integrity................................................................................................81
6.2.2.3 Confidentiality ....................................................................................82
6.2.2.4 Association with Usage or Application ...............................................82
6.2.2.5 Association with the Other Entities .....................................................83
6.2.2.6 Association with Other Related Information .......................................83
6.2.3 Labeling of Cryptographic Information..............................................................83
6.2.3.1 Labels for Keys....................................................................................83
6.2.3.2 Labels for Related Cryptographic Information....................................84
7 KEY STATES AND TRANSITIONS....................................................................................85
7.1 Key States ...........................................................................................................................85
7.2 Key State Transitions..........................................................................................................86
7.3 States and Transitions for Asymmetric Keys......................................................................87
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