Internet of Things Architecture

Analyze the performance model

Conduct practical testing

Assess against the requirements

Rework the architecture

Tactics Optimize repeated processing

Reduce contention via replication

Prioritize processing

Consolidate related workload

Distribute processing over time

Minimize the use of shared resources

Reuse resources and results

Partition and parallelize

Scale up or scale out

Degrade gracefully

Use asynchronous processing

Relax transactional consistency

Make design compromises

Table 6 : Performance and Scalability (adopted from [Rozanski 2005]), extended

with IoT specific aspects

4.3.3 Trust, Security and Privacy

This chapter addresses fundamental properties of IoT systems for what
concerns their relation to the user. They are inter-related and, often, the
evaluation or the improvement of one of these qualities is necessarily related to
the others.

4.3.3.1 Trust

Trust in the IoT environment is a fundamental yet difficult to obtain quality. As
the security one, this quality is highly dependent on the computation and
communication performance of the system. In the frame of IoT moreover, M2M
subjects must be enabled to evaluate this quality in order to obtain autonomous
systems.

Desired Quality A complex quality related to the extent to which a

subject expects (subjectively) an IoT system to be

dependable regarding in all the aspects of its functional

behaviour.

IoT-A Requirements UNI.062, UNI.065, UNI.099, UNI.407, UNI.408,

UNI.602, UNI.604, UNI.605, UNI.620, UNI.622

Applicability Relevant to the systems that share the use of

resources with subjects that are not a priori trusted.

Activities Capture trust requirements

Perform risk analysis

Check interoperability requirements and their impact on