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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 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)?
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: