January 2018
Intermediate to advanced
524 pages
13h 33m
English
Content preview from Internet of Things for Architects
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IEEE 802.15.4 security
The IEEE 802.15.4 standard includes security provisions in the form of encryption and authentication. The architect has flexibility in the security of the network based on cost, performance, security, and power. The different security suites are listed in the following table.
AES-based encryption uses a block cipher with a counter mode. The AES-CBC-MAC provides authentication-only protection, and the AES-CCM mode provides the full suite of encryption and authentication. The 802.15.4 radios provide an access control list (ACL) to control which security suite and keys to use. Devices can store up to 255 ACL entries.
The MAC layer also computes "freshness checks" between successive repetitions to ensure old frames or ...
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