ECCouncil Updated 312-50v13 Exam Questions and Answers by alara

CEH v13 explains that Side-Channel Attacks exploit physical characteristics of cryptographic devices—such as power consumption, timing variations, electromagnetic leakage, or acoustic emissions—to infer confidential data like encryption keys. These attacks do not break the cryptographic algorithm itself but instead analyze unintended signals produced during computation. The scenario describes a classic power analysis and timing analysis attack, where the attacker monitors fluctuations during encryption operations on a smart card. CEH details how Differential Power Analysis (DPA) and Simple Power Analysis (SPA) allow attackers to extract secret keys by statistically correlating measured power traces to cryptographic operations. This type of attack is extremely dangerous because it bypasses mathematical strength and targets hardware implementation flaws. Options A, C, and D do not relate to side-channel exploitation. CEH specifically categorizes this method as observing hardware emissions to deduce secrets, making Option B the most accurate match.

This scenario most accurately represents repackaging legitimate apps. CEH mobile social engineering coverage explains that in a repackaging attack, an adversary takes a real application, modifies its internal code or structure to include malicious functionality, and redistributes it through a third-party marketplace. The important clues here are that the app appears visually and functionally identical to the legitimate version, yet sandboxing reveals additional outbound activity and binary comparison confirms structural differences from the official build. That pattern is stronger than merely publishing a look-alike malicious app, because the question indicates there are two versions of what is essentially the same application and the unofficial copy has been altered. Smishing involves fraudulent SMS messages and fake security applications typically masquerade as protective tools, neither of which matches this case. CEH warns that unofficial application stores are a common distribution point for repackaged mobile apps because attackers can embed spyware, adware, credential theft code, or other malicious logic into otherwise trusted software. The user often sees a familiar interface and therefore assumes the application is safe, making repackaging a highly effective mobile-based social engineering method.

Passive reconnaissance focuses on collecting intelligence without interacting with the target ' s systems. CEH materials emphasize reviewing publicly available information, including leaked documents, breach data, reports, or exposed metadata, as this yields internal network structure details while generating no detectable traffic. This method avoids triggering monitoring systems and aligns with stealth requirements for covert intelligence gathering.

CEH explains that MAC flooding overwhelms a switch’s CAM table, causing it to fail open. When the table fills, the switch broadcasts frames out all ports, behaving like a hub. This exposes unicast traffic to attackers operating in promiscuous mode.