+SC-08 Transmission Confidentiality and Integrity
---+SC-08(01) Cryptographic Protection
---+SC-08(02) Pre- and Post-transmission Handling
---+SC-08(03) Cryptographic Protection for Message Externals
---+SC-08(04) Conceal or Randomize Communications
---+SC-08(05) Protected Distribution System
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SC-08 Transmission Confidentiality and Integrity
Control
Protect the [Selection(one-or-more): confidentiality; integrity] of transmitted information.
Discussion
Protecting the confidentiality and integrity of transmitted information applies to internal and external networks as well as any system components that can transmit information, including servers, notebook computers, desktop computers, mobile devices, printers, copiers, scanners, facsimile machines, and radios. Unprotected communication paths are exposed to the possibility of interception and modification. Protecting the confidentiality and integrity of information can be accomplished by physical or logical means. Physical protection can be achieved by using protected distribution systems. A protected distribution system is a wireline or fiber-optics telecommunications system that includes terminals and adequate electromagnetic, acoustical, electrical, and physical controls to permit its use for the unencrypted transmission of classified information. Logical protection can be achieved by employing encryption techniques.
Organizations that rely on commercial providers who offer transmission services as commodity services rather than as fully dedicated services may find it difficult to obtain the necessary assurances regarding the implementation of needed controls for transmission confidentiality and integrity. In such situations, organizations determine what types of confidentiality or integrity services are available in standard, commercial telecommunications service packages. If it is not feasible to obtain the necessary controls and assurances of control effectiveness through appropriate contracting vehicles, organizations can implement appropriate compensating controls.
Assessment Objective
the [Selection(one-or-more): confidentiality; integrity] of transmitted information is/are protected.
Assessment Method
Examine
System and communications protection policy
procedures addressing transmission confidentiality and integrity
system design documentation
system configuration settings and associated documentation
system audit records
system security plan
other relevant documents or records
Interview
System/network administrators
organizational personnel with information security responsibilities
system developer
1. Prehľad
| Názov |
Štandard |
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SC-08(01) Cryptographic Protection
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Control
Implement cryptographic mechanisms to [Selection(one-or-more): prevent unauthorized disclosure of information; detect changes to information] during transmission.
Discussion
Encryption protects information from unauthorized disclosure and modification during transmission. Cryptographic mechanisms that protect the confidentiality and integrity of information during transmission include TLS and IPSec. Cryptographic mechanisms used to protect information integrity include cryptographic hash functions that have applications in digital signatures, checksums, and message authentication codes.
Assessment Objective
cryptographic mechanisms are implemented to [Selection(one-or-more): prevent unauthorized disclosure of information; detect changes to information] during transmission.
Assessment Method
Examine
System and communications protection policy
procedures addressing transmission confidentiality and integrity
system design documentation
system configuration settings and associated documentation
system audit records
system security plan
other relevant documents or records
Interview
System/network administrators
organizational personnel with information security responsibilities
system developer
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SC-08(02) Pre- and Post-transmission Handling
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Control
Maintain the [Selection(one-or-more): confidentiality; integrity] of information during preparation for transmission and during reception.
Discussion
Information can be unintentionally or maliciously disclosed or modified during preparation for transmission or during reception, including during aggregation, at protocol transformation points, and during packing and unpacking. Such unauthorized disclosures or modifications compromise the confidentiality or integrity of the information.
Assessment Objective
- information [Selection(one-or-more): confidentiality; integrity] is/are maintained during preparation for transmission;
- information [Selection(one-or-more): confidentiality; integrity] is/are maintained during reception.
Assessment Method
Examine
System and communications protection policy
procedures addressing transmission confidentiality and integrity
system design documentation
system configuration settings and associated documentation
system audit records
system security plan
other relevant documents or records
Interview
System/network administrators
organizational personnel with information security responsibilities
system developer
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SC-08(03) Cryptographic Protection for Message Externals
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Control
Implement cryptographic mechanisms to protect message externals unless otherwise protected by [Assignement: alternative physical controls].
Discussion
Cryptographic protection for message externals addresses protection from the unauthorized disclosure of information. Message externals include message headers and routing information. Cryptographic protection prevents the exploitation of message externals and applies to internal and external networks or links that may be visible to individuals who are not authorized users. Header and routing information is sometimes transmitted in clear text (i.e., unencrypted) because the information is not identified by organizations as having significant value or because encrypting the information can result in lower network performance or higher costs. Alternative physical controls include protected distribution systems.
Assessment Objective
cryptographic mechanisms are implemented to protect message externals unless otherwise protected by [Assignement: alternative physical controls].
Assessment Method
Examine
System and communications protection policy
procedures addressing transmission confidentiality and integrity
system design documentation
system configuration settings and associated documentation
system audit records
system security plan
other relevant documents or records
Interview
System/network administrators
organizational personnel with information security responsibilities
system developer
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SC-08(04) Conceal or Randomize Communications
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Control
Implement cryptographic mechanisms to conceal or randomize communication patterns unless otherwise protected by [Assignement: alternative physical controls].
Discussion
Concealing or randomizing communication patterns addresses protection from unauthorized disclosure of information. Communication patterns include frequency, periods, predictability, and amount. Changes to communications patterns can reveal information with intelligence value, especially when combined with other available information related to the mission and business functions of the organization. Concealing or randomizing communications prevents the derivation of intelligence based on communications patterns and applies to both internal and external networks or links that may be visible to individuals who are not authorized users. Encrypting the links and transmitting in continuous, fixed, or random patterns prevents the derivation of intelligence from the system communications patterns. Alternative physical controls include protected distribution systems.
Assessment Objective
cryptographic mechanisms are implemented to conceal or randomize communication patterns unless otherwise protected by [Assignement: alternative physical controls].
Assessment Method
Examine
System and communications protection policy
procedures addressing transmission confidentiality and integrity
system design documentation
system configuration settings and associated documentation
system audit records
system security plan
other relevant documents or records
Interview
System/network administrators
organizational personnel with information security responsibilities
system developer
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SC-08(05) Protected Distribution System
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Control
Implement [Assignement: protected distribution system] to [Selection(one-or-more): prevent unauthorized disclosure of information; detect changes to information] during transmission.
Discussion
The purpose of a protected distribution system is to deter, detect, and/or make difficult physical access to the communication lines that carry national security information.
Assessment Objective
the [Assignement: protected distribution system] is implemented to [Selection(one-or-more): prevent unauthorized disclosure of information; detect changes to information] during transmission.
Assessment Method
Examine
System and communications protection policy
procedures addressing transmission confidentiality and integrity
system design documentation
system configuration settings and associated documentation
system audit records
system security plan
other relevant documents or records
Interview
System/network administrators
organizational personnel with information security responsibilities
system developer
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1.1 Odkazy
1.2 Identifikované požiadavky
1.3 Súvisiace predpisy
2. Identifikované požiadavky
Požiadavky
| Zdroj |
Požiadavka |
3. Súvisiace predpisy
Prepojené úlohy
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