April 2014
Intermediate to advanced
538 pages
17h 31m
English
Content preview from Security for Multihop Wireless Networks
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310 ◾ Security for Multihop Wireless Networks
replay protection. ese services are defined at the link layer and they are pro-
vided by means of three different security modes:
◾ Unsecured mode: It does not provide any security service.
◾ Access control list (ACL) mode: It ensures that a device only accepts frames
from those entities included in the ACL, but it does not provide any mecha-
nism to protect the transmission of these frames over the wireless link.
◾ Secured mode: It provides frame confidentiality, integrity, access control, and
replay protection.
12.2.1.1 Basic Operation
e access control service implies that each device can select which other devices it
accepts to communicate with. e IEEE 802.15.4 standard provides this service
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