119 which public key cryptosystem relies on the

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119 Which public key cryptosystem relies on the difficulty of factoring the product of large prime numbers? A. El Gamal B. Elliptic Curve C. RSA D. Diffie-Hellman Answer: C See Chapter 7. Rivest, Shamir, Adleman (RSA) is the only one of these that works with the product of two large prime numbers. The other cryptosystems mentioned use discreet logarithms in finite fields. 120 The substitution cipher that shifts characters by 13 positions, which is used by UNIX systems, is known as A. Crypt B. ROOT 13 C. ROT 13 D. ROTOR 13 Answer: C See Chapter 7. UNIX used the simple substitution cipher called ROT 13 to obfuscate messages. It was most often used in newsgroups to hide off-color jokes from those who were easily offended and didn’t want to read them. ROT-13 wasn't meant to be difficult to decrypt @@md only to make text unrecognizable on sight. 121 The Internet Worm Incident of 1988 was perpetrated by A. The 414 Gang B. Robert Morris C. Kevin Mitnick D. Gene Spafford Answer: B
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See Chapter 9. Robert Morris wrote and released what's now known as the Internet Worm in 1988. Gene Spafford wrote several papers on the topic. 122 Forensics is the term that describes A. Due process B. Tracking hackers from other countries C. Taking steps to preserve and record evidence D. Scrubbing a system in order to return it to service Answer: C See Chapter 9. Forensics is the study and activity of discovering, preserving, and recording evidence. 123 An expert witness A. Offers an opinion based on the facts of a case and on personal expertise B. Is someone who was present at the scene of the crime C. Has direct personal knowledge about the event in question D. Can testify in criminal proceedings only Answer: A See Chapter 9. An expert witness offers his or her opinion based on the facts of the case and on personal expertise. 124 A witness A. Offers an opinion based on the facts of a case and on personal expertise B. Is someone who was present at the scene of the crime C. Has direct personal knowledge about the event in question D. Can testify in criminal proceedings only Answer: C See Chapter 9. A witness testifies to the facts as he or she understands them. 125 Entrapment is defined as A. Leading someone to commit a crime that he or she wouldn’t otherwise have committed B. Monitoring with the intent of recording a crime C. Paying someone to commit a crime D. Being caught with criminal evidence in one’s possession Answer: A
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See Chapter 9. Entrapment refers to the activities that lure an individual into committing a crime that he or she wouldn’t have otherwise committed. 126 Enticement is defined as A. Being caught with criminal evidence in one’s possession B. Leading someone to commit a crime that they wouldn’t otherwise have committed C. Monitoring with the intent of recording a crime D. Keeping the criminal at the scene of the crime long enough to gather evidence Answer: D See Chapter 9. Enticement is used to keep a criminal at the scene of the crime. In the context of electronic crime, a honeypot is a great way to keep an intruder sniffing around while his or her origin is traced.
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