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Chapter 1 - Coggle Diagram

- - - - Person to person messaging (chat with friends)
      - Interactive Information services (getting weather forecast)
      - Entertainment services (download a ringtone)
    - - Notification & alert services: (Emergency broadcast messages, ShortCode)
      - Managing contacts & Appointments (Outlook Integration)
      - Content Push – pushing information or content to subscribers
  - - - Attackers replace originating Sender ID with alphanumeric text, mispresenting its origin and impersonating legitimate sender.
    - - Users may be baited into sending private information or click on the URL presented in the messages.
    - - Unsolicited SMS messages to users’ devices
    - - Irresponsible company subscribe user to premium SMS service without their consent.
    - - Attacker install malware to send thousands of SMS to target victim device, jamming the SMS functionality
- - - - Design to movable and portable, meant to be carried by its user
      - Data stored inside device should be portable too
    - - Meant to be connected to any form of network
      - Users expect to use mobile device to connect with other users.
    - - Mobile device will always have relatively limited storage
      - Application should always minimize the use of storage or at least offload the storage to a remote location.
    - - Mobile device power is limited by its battery capacity
    - - Resource in mobile device refers to its memory, processing capabilities and connectivity.
      - Memory (or RAM) is limited in mobile device. Device will often freeze when it runs out of memory while in use.
      - Mobile device has limited connectivity (Unreliable network coverage, Limited network cell capacity (overcrowding), Subject to interference (signal bounces off barrier, noise)
  - - - User may move while using apps, physical location and social context may change while user are travelling.
    - - Users attention may be distracted by his environment or social cues.
      - Tasks performed on mobile device should always be expected to be interruptible.
    - - Users are always available to remote friends and contacts.
      - Purpose of mobile devices is to make its users ‘available’.
    - - To reach others around you, able to communicate or to engage in other forms of digital social interaction
    - - Devices are personal, they unique to a single user (unique phone numbers, user account, SIM card, email addresses, contact lists)