Option 4: Elasticity

Elasticity is not a basic construct of security in cloud architecture. The fundamental principles of security in cloud computing typically include:

1. Confidentiality: Ensuring that data is only accessible by authorized users and not exposed to unauthorized parties.

2. Integrity: Maintaining the accuracy and reliability of data, ensuring that it is not tampered with or altered by unauthorized entities.

3. Availability: Ensuring that services and resources are available and accessible when needed, with minimal downtime or disruptions.

Elasticity, on the other hand, is a concept related to scalability and the ability to dynamically allocate and deallocate computing resources in response to changing workloads and demand. While elasticity is an important aspect of cloud computing, it is not considered a fundamental security construct.