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Privacitat de Dades i Seguretat [MO79541]
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In a simple DC-net with four nodes: A, B, C, and D. Supose that the shared bit between them is:
- bAB
=1,
- bBC
=1,
- bCD
=1,
- bAD
=1,
Now supose that node A wants to send the message m
A=1, while all the others
send 0. What is the actual message sent by node B using the DC-net?
A Crowds system protects against a passive and global adversaries
The use of dummy traffic improves the privacy of a Crowds system
In a Crowds system with N nodes (jondos) and forwarding probability p, the maxim path length that a message will use (that is, path of crowd nodes before reachin the destination) is 2*n
In a simple DC-net with four nodes: A, B, C, and D. Supose that the shared bit between them is:
- bAB
=1,
- bBC
=0,
- bCD
=1,
- bAD
=1,
Now supose that node A sends the message m
A=1, while all the others
send 0. Wat is the message sent by node A?
In a simple DC-net with four nodes: A, B, C, and D. Supose that the shared bit between them is:
- bAB
=0,
- bBC
=1,
- bCD
=0,
- bAD
=0,
Now supose that node A wants to send the message m
A=1, while all the others
send 0. What is the actual message sent by node B using the DC-net?
Here you can downloada CSV with a microdata table: If we consider all attributes (variables) to be quasi-identifiers, is this table k-anonymous?
What is the probability that the attacker has to reidentify the record corresponding to Annette, knowing that she lives in Valencia province and is 51 years old (give a value between 100 and 0 with at least 2 decimal values)?
The definition of anonymity that we are using states that:
What kind of disclosure is happening in Exercise 4 (when the attacker knows that Annette is from the Valencia province and that she is 51 years old)?