Lecture 7 (medium)

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What is the purpose of full-disk encryption in Android?

To protect user data by encoding all data on the device using symmetric encryption keys

Which feature does file-based encryption introduce in Android 7.0?

Encrypting directory layouts and file sizes

What type of data is encrypted by metadata encryption in Android?

File creation/modification times

Which security best practice involves ensuring the software collects only the necessary information?

Collecting only the information required by the software

Why is the Secure Enclave used in iOS for biometric data processing?

To provide an extra layer of security for user biometric data

What is a thread in the context of mobile application development?

A thread is a lightweight way to implement multiple paths of execution inside an application.

What is the main advantage of having a multithreaded application?

Increased responsiveness and real-time performance on multicore systems.

What are the challenges associated with multithreaded applications?

Threads coordinate actions to prevent corruption of the application's state information.

What is a key rule for writing efficient code in mobile applications?

Don't do work that you don't need to do.

What is the recommended approach to handle power consumption in mobile applications?

Let the chip idle when using hardware and execute code in bursts to save energy.

What are the main challenges associated with multithreaded applications?

Coordinating actions between threads to prevent corruption of application's state information.

What is the key rule for handling power consumption in mobile applications?

Let the chip idle and avoid continuous polling for information.

Explain the purpose of full-disk encryption in Android.

Full-disk encryption encrypts all data on the device to protect it from unauthorized access.

What type of data is encrypted by metadata encryption in Android?

Sensitive file metadata such as file sizes and permissions.

What feature does file-based encryption introduce in Android 7.0?

File-based encryption allows each user profile to have its own encrypted data partition.

Learn about the deprecated Android Device Monitor tools and the updated Android Profiler window available in Android Studio 3.0 and higher. Understand how the Android Profiler provides real-time data on app's CPU, memory, and network activity, along with tools for method tracing, heap dumps, memory allocations, and network file inspection.

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