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March, 2007 Assurance of private key possession provides assurance that the owner of a public key actually possesses the corresponding private key (see Section 5.4.4). The period of protection for cryptographic keys, associated key information, and cryptographic parameters (e.g. initialization vectors) depends on the type of key, the associated cryptographic service, and the length of time for which the cryptographic service is required. The period of protection includes the cryptoperiod of the key (see Section 5.3). The period of protection is not necessarily the same for integrity as it is for confidentiality. Integrity protection may be required until a key is no longer used, but confidentiality protection may be required until the key is destroyed. 6.1.1 Summary of Protection Requirements for Cryptographic Keys Table 5 provides a summary of the protection requirements for keys during distribution and storage. Methods for providing the necessary protection are discussed in Section 6.2. Guide to Table 5: a. Column 1 (Key Type) identifies the key types. b. Column 2 (Security Service) indicates the type of security service that is provided by the key in conjunction with a cryptographic technique. c. Column 3 (Security Protection) indicates the type of protection required for the key (archive, integrity, and confidentiality). d. Column 4 (Association Protection) indicates the types of associations that need to be protected for that key, such as associating the key with the usage or application, the authorized communications participants or other indicated information. The association with domain parameters applies only to algorithms where they are used. e. Column 5 (Assurances Required) indicates whether assurance of public key validity and/or assurance of private key possession needs to be obtained as defined in [SP800-56], [FIPS186-3] and this recommendation. Assurance of public key validity provides a degree of confidence that a key is arithmetically correct. See Section 5.4.3 for further details. Assurance of private key possession provides a degree of confidence that the entity providing a public key actually possessed the associated private key at some time. See Section 5.4.4 for further details. f. Column 6 (Period of Protection) indicates the length of time that the integrity and/or confidentiality of the key need to be maintained (see Section 5.3). Symmetric keys and private keys shall be destroyed at the end of their period of protection (see Sections 8.3.4 and 9.3). 73
Table 5: Protection requirements for cryptographic keys Key Type Security Service Private signature key Public signature verification key Symmetric authentication key Private authentication key Public authentication key Symmetric data encryption/dec ryption key Authentication; Integrity; Nonrepudiation Authentication; Integrity; Nonrepudiation Authentication; Integrity Authentication; Integrity Authentication; Integrity Security Protection Integrity 24 ; Confidentiality Archive; Integrity; Archive; Integrity; Confidentiality Integrity; Confidentiality Archive; Integrity Confidentiality Archive; Integrity; Confidentiality Association Protection Usage or application; Domain parameters; Public signature verification key Usage or application; Key pair owner Domain parameters; Private signature key; Signed data Usage or application; Other authorized entities; Authenticated data Usage or application; Public authentication key; Domain parameters Usage or application; Key pair owner; Authenticated data; Private authentication key; Domain parameters Usage or application; Other authorized entities; Plaintext/Encrypted data Assurances Required 24 Integrity protection can be provided by a variety of means. See Sections 6.2.1.2 and 6.2.2.2. 74 March, 2007 Period of Protection Possession From generation until the end of the cryptoperiod Validity From generation until no protected data needs to be verified From generation until no protected data needs to be verified Possession From generation until the end of the cryptoperiod Validity From generation until no protected data needs to be authenticated From generation until the end of the lifetime of the data or the end of the cryptoperiod, whichever comes later
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ARCHIVED PUBLICATION The attached p
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Abstract March, 2007 This Recommend
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Authority March, 2007 This document
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March, 2007 key validation, account
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March, 2007 4.2.4.1 DSA............
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March, 2007 8 KEY MANAGEMENT PHASES
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March, 2007 10.2.9 Compromise Manag
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March, 2007 Figure 3: Key states an
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March, 2007 1.2 Audience The audien
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March, 2007 1. Section 1, Introduct
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March, 2007 Backup A copy of inform
Page 23 and 24: March, 2007 Digital signature The r
Page 25 and 26: Key Management Policy Key Managemen
Page 27 and 28: Proof of possession (POP) Pseudoran
Page 29 and 30: March, 2007 Split knowledge A proce
Page 31 and 32: March, 2007 3 Security Services Cry
Page 33 and 34: March, 2007 However, it is often th
Page 35 and 36: March, 2007 4 Cryptographic Algorit
Page 37 and 38: March, 2007 operates on blocks (chu
Page 39 and 40: March, 2007 minimum key size 7 of 1
Page 41 and 42: March, 2007 2. The protocols trigge
Page 43 and 44: March, 2007 7. Symmetric key wrappi
Page 45 and 46: March, 2007 9. Random numbers: The
Page 47 and 48: March, 2007 In general, where stron
Page 49 and 50: March, 2007 a. When a symmetric key
Page 51 and 52: March, 2007 information. For less s
Page 53 and 54: 8. Symmetric and Asymmetric RNG key
Page 55 and 56: 15. Private ephemeral key agreement
Page 57 and 58: Key Type 12. Symmetric Key Agreemen
Page 59 and 60: March, 2007 establishment keys, see
Page 61 and 62: March, 2007 c. Restricting plaintex
Page 63 and 64: March, 2007 algorithms completely i
Page 65 and 66: March, 2007 Table 3: Hash function
Page 67 and 68: Table 4: Recommended algorithms and
Page 69 and 70: March, 2007 size is available, the
Page 71 and 72: Security life of data up to 4 years
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Page 77 and 78: Key Type Security Service Private e
Page 79 and 80: March, 2007 Crypto. Security Securi
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Page 83 and 84: March, 2007 All cryptographic infor
Page 85 and 86: March, 2007 8. Domain parameters (e
Page 87 and 88: March, 2007 6. Destroyed Compromise
Page 89 and 90: March, 2007 a. A private signature
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Page 95 and 96: 8.1.5.1.1 Distribution of Static Pu
Page 97 and 98: March, 2007 and then provide eviden
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Page 103 and 104: March, 2007 8.1.5.3.5 Intermediate
Page 105 and 106: March, 2007 of keying material and
Page 107 and 108: March, 2007 2. The application in w
Page 109 and 110: March, 2007 and the key derivation
Page 111 and 112: March, 2007 Type of Key Archive? Re
Page 113 and 114: March, 2007 All records of the enti
Page 115 and 116: March, 2007 other cryptographic inf
Page 117 and 118: March, 2007 access to information e
Page 119 and 120: March, 2007 1. Private key used to
Page 121 and 122: March, 2007 10.2 Content of the Key
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March, 2007 is the same value as th
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March, 2007 If the decision is made
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March, 2007 only, and then shall be
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March, 2007 may be stored in backup
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March, 2007 and the method of key r
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March, 2007 ephemeral key pairs, an
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B.3.14.7 Key Control Information Ma
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March, 2007 to be saved. Keys for t
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[HAC] Handbook of Applied Cryptogra
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March, 2007 the owner by the CA tha
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