MUFFLER

What is the primary goal of MUFFLER as described in the article?

• To enhance Tor's encryption algorithms

• To improve bandwidth efficiency in Tor ingress traffic

• To secure Tor egress traffic against flow correlation attacks

• To replace the Tor protocol with a new system

Which of the following is NOT a limitation of existing Tor obfuscation methods mentioned in the article?

• Inability to encrypt traffic between Tor nodes

• Significant network overhead during obfuscatio

• Lack of dynamic obfuscation for egress segments

• Static multiplexing schema for hidden services

What is the difference between connection shuffling and connection splitting in MUFFLER?

• Shuffling adds padding bytes, while splitting introduces timing delays.

• Shuffling encrypts traffic, while splitting compresses traffic

• Shuffling is used for ingress traffic, while splitting is used for egress traffic.

• Shuffling merges packets from multiple real connections, while splitting distributes packets from one real connection across virtual connections

Which attack does MUFFLER effectively mitigate with a True Positive Rate (TPR) of 1% at a False Positive Rate (FPR) of 10^{-2}?

• All of the above

• SUMo attack

• DeepCorr attack

• RAPTOR attack

What is the main challenge addressed by MUFFLER in the context of hidden services?

• Encrypting traffic between users and hidden services

• Reducing bandwidth consumption for hidden services

• Improving latency for hidden services

• Preventing flow correlation attacks on multiplexed traffic

Existing obfuscation techniques often introduce excessive _________ overhead, making them impractical.

What is the bandwidth overhead imposed by MUFFLER according to the article?

• Around 10%

• Less than 1%

• Over 25%

• Approximately 2.17%

Which feature of MUFFLER helps avoid unnecessary kernel stack processes during obfuscation?

• Dynamic connection mapping

• Leveraging recent kernel networking features

• Embedding metadata in packets

• Using advanced cryptographic algorithms

The SUMo attack focuses exclusively on public services rather than hidden services.

• True

• False

What is the shuffling factor a used for in MUFFLER?

• To determine the number of real connections

• To set the timing delay intervals

• To adjust the size of padding bytes

• To calculate the number of virtual connections