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

More documents

Recommendations

Info

March, 2007 recomputed. This imposes a significant burden; therefore, the strength of the cryptographic algorithm shall be selected so as to minimize the need for re-encryption. Likewise, integrity protection may be provided by an archive integrity key (one or more authentication or digital signature keys that are used exclusively for the archive) or by another key that has been archived. If integrity protection is to be maintained at the end of the cryptoperiod of the archive integrity key, new integrity values shall be computed on the archived information on which the old archive integrity key was applied. The archive keys may be either symmetric keys or public key pairs. Unless the cryptographic algorithm is specifically designed to provide both integrity and confidentiality with a single key, the keys used for confidentiality and integrity shall be different, and shall be protected in the same manner as their key type (see Section 6). Tables 9 and 10 indicate the appropriateness of archiving keys and other cryptographic related information. An “OK” in column 2 (Archive?) indicates that archival is permissible, but not necessarily required. Column 3 (Retention period) indicates the minimum time that the key should be retained in the archive. Additional advice on the storage of keying material in archive storage is provided in Appendix B.3. Table 9: Archive of keys Type of Key Archive? Retention period (minimum) Private signature key No Public signature verification OK Until no longer required to verify data key signed with the assoc. private key Symmetric authentication key OK Until no longer needed to authenticate data. Private authentication key No Public authentication key OK Until no longer required to verify the authenticity of data that was authenticated with the assoc. private key Symmetric data encryption key OK Until no longer needed to decrypt data encrypted by this key Symmetric key wrapping key OK Until no longer needed to decrypt keys encrypted by this key Symmetric random number generator key No Symmetric master key OK, if needed to derive other keys for archived data 109 Until no longer needed to derive other keys
March, 2007 Type of Key Archive? Retention period (minimum) Private key transport key OK Until no longer needed to decrypt keys encrypted by this key Public key transport key No Symmetric key agreement key OK Private static key agreement key Public static key agreement key Private ephemeral key agreement key Public ephemeral key agreement key No unless needed to reconstruct keying material Until no longer needed to reconstruct keying material OK Until no longer needed to reconstruct keying material NO OK Symmetric authorization key No Private authorization key No Public authorization key No 110
Page 1 and 2:
ARCHIVED PUBLICATION The attached p
Page 3 and 4:
Abstract March, 2007 This Recommend
Page 5 and 6:
Authority March, 2007 This document
Page 7 and 8:
March, 2007 key validation, account
Page 9 and 10:
March, 2007 4.2.4.1 DSA............
Page 11 and 12:
March, 2007 8 KEY MANAGEMENT PHASES
Page 13 and 14:
March, 2007 10.2.9 Compromise Manag
Page 15 and 16:
March, 2007 Figure 3: Key states an
Page 17 and 18:
March, 2007 1.2 Audience The audien
Page 19 and 20:
March, 2007 1. Section 1, Introduct
Page 21 and 22:
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
Page 73 and 74: March, 2007 6 Protection Requiremen
Page 75 and 76: Table 5: Protection requirements fo
Page 77 and 78: Key Type Security Service Private e
Page 79 and 80: March, 2007 Crypto. Security Securi
Page 81 and 82: March, 2007 may be applied only to
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
Page 91 and 92: 2 Pre-Operational Phase 3 7 1 4 Ope
Page 93 and 94: March, 2007 8.1 Pre-operational Pha
Page 95 and 96: 8.1.5.1.1 Distribution of Static Pu
Page 97 and 98: March, 2007 and then provide eviden
Page 99 and 100: March, 2007 listed in Section 8.1.5
Page 101 and 102: March, 2007 encrypting key or publi
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: March, 2007 and the key derivation
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
Page 123 and 124: March, 2007 Management Specificatio
Page 125 and 126: March, 2007 is the same value as th
Page 127 and 128: March, 2007 If the decision is made
Page 129 and 130: March, 2007 only, and then shall be
Page 131 and 132: March, 2007 may be stored in backup
Page 133 and 134: March, 2007 and the method of key r
Page 135 and 136: March, 2007 ephemeral key pairs, an
Page 137 and 138: B.3.14.7 Key Control Information Ma
Page 139 and 140: March, 2007 to be saved. Keys for t
Page 141 and 142: [HAC] Handbook of Applied Cryptogra
Page 143: March, 2007 the owner by the CA tha
show all

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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?