Deliverable 2

Description: Add differential privacy to fuzzify number of users in groups. This deliverable ensures that Yioop is protected against statistical attacks

Implementation steps:

• Identify instances in the UI where the statistic - number of users in a group - is displayed
• Locate the Controller where group activities are handled
• Identify and understand the working of the function that displays group users data
• Understand the database function that fetches group users data from the database
• Apply differential privacy to number of users in a group

Discoveries:

• Controller where group activities are handled : SocialComponent
• Function that displays group users data : getGroupUsersData()
• Function to fetch group users data from DB : countGroupUsers()

Results:

Create a group test with 3 users: root, user1 and user2

Login as user1 and check if number of users is fuzzified

Login as root and check if number of users is fuzzified