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changes.mady.by.user Unknown User (steb@mit.edu)

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  • Use their mobile phones very frequently to communicate with others
  • Have to deal with sensitive information on a regular basis
  • Concerned with Privacy, but not with the technical details of how to be secure
  • Concerned about Personal Safety

User Classes

Message Sender

Message Receiver

Task Analysis

Task

Goal

Frequency

Effort

Pitfalls

Others Involved

Manage Contacts

To ensure the identity (or psudo-identity) of
other users and to communicate efficiently.

sometimes

medium

Indicates that the user
knows someone

The contact
(sometimes)

Communicate Have a conversation

To discuss a topic securely while remaining
as anonymous as the user wishes.

often

medium

Expose information

Other people in
the conversation

Dissociate with a user +
Erase evidence or erase records of a
conversation

To break contact or association with a contact
or group of contacts or erase evidence any record of a
single correspondence conversation.

rarely

fast

unsafe (can't undo)


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