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Question 13 (1 point) Which of the following principles is UNLIKELY to be the most important security principles widely accepted to public? 1) fail-safe defaults 2) security by obscurity 3) least privilege 4) psychological acceptability Which of the following statements is NOT true? 1) The digital certificate binds the user and the associated public key. 2) The message authentication code scheme assumes a key shared between the sender and receiver. The underlying implementation of digital signatures is based on public key encryption 4) Symmetric encryption requires a pair of public and private keys to encrypt and decrypt messages. 3) Question 17 (1 point) Which of the following statements is NOT true? 1) 2) Barcodes incorporate an integrated circuit, optionally with an on-board microprocessor. Differential power analysis is one of the side channel attacks, based on the analysis of power consumption. RFID chips operate using radio waves, and hence, they can release information WITHOUT the need for direct physical contact. 4) U.S. passports feature an embedded RFID chip that contains information about the owner. 3) Question 18 (1 point) Which of the following statements is NOT true? 1) Spoofing uses false addresses. 2) Digital signatures can be employed to address the repudiation problem. 3) Traceback is an attack on confidentiality. 4) The tool of packet sniffing can be used for eavesdropping