IT Baseline Protection Manual - The Information Warfare Site

Safeguard Catalogue - Organisation Remarks
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more. This option can be useful as the reception of calls sometimes attracts
high charges in foreign countries.
Whether any call restrictions should be chosen and, if so, which ones, will
depend on the way in which the mobile phone concerned is used.
Closed User Group
The "Closed User Group" service allows communications to be restricted to
the members of that group (see also S 5.47 Configuration of a Closed User
Group).
The group members must be registered with the network provider. The
"Closed User Group" option can be activated on the mobile phone. It can be
appropriate to set up closed user groups, for example, to restrict the
transmission of data by mobile phone.
Additional controls:
- Is there an up-to-date set of security guidelines for the use of mobile
phones?
- How is adherence to the security guidelines on the use of mobile phones
checked?
- Does every mobile phone user have a copy of these mobile phone
guidelines or an instruction sheet which contains a summary of the most
important security mechanisms?
- Are the security guidelines for the use of mobile phones included in the
training given on IT security measures?
- Are mobile phone users informed of the rules which they are expected to
observe?
- Are mobile phone users informed of the importance of taking proper care
of the equipment?
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IT-Baseline Protection Manual: Oktober 2000