Applicable

(Y)es / (N)o

(C)onfidentiality

(I)ntegrity

(A)vailability

RPN

(C+I+A)

(S)atisfactory

L1

M2

H3

L1

M2

H3

L1

M2

H3

(O)ther than satisfactory +##

ac-20(1)

use of external information  systems  | limits on authorized use

assessment objective:

Determine if the organization permits authorized individuals to use an external information system to access the information system or to process, store, or transmit organization-controlled information only when the organization:

ac-20(1)(a)

verifies the implementation of required security controls on the external system as specified in the organization’s information security policy and security plan; or

ac-20(1)(b)

retains approved information system connection or processing agreements with the organizational entity hosting the external information system.

potential assessment methods and objects:

Examine: [select from: Access control policy; procedures addressing the use of external information systems; security plan; information system connection or processing agreements; account management documents; other relevant documents or records].

Interview: [select from: System/network administrators; organizational personnel with information security responsibilities].

Test: [select from: Automated mechanisms implementing limits on use of external information systems].