The primary purpose of a digital signature in electronic documents is to ensure authenticity. It provides a way to verify that the document has not been tampered with and that it was indeed signed by the claimed sender. Digital signatures use cryptographic techniques to achieve this.

The most common motivation behind insider threats is personal gain. This can include financial gain, revenge against the organization, or selling sensitive information to third parties. Understanding these motivations is essential for preventing and mitigating insider threats.

This is an example of an Administrative Control. Administrative controls are measures and policies put in place to manage and regulate security practices. In this case, mandating the use of a specific platform is an administrative measure to ensure traceability and accountability when logging incidents.

The attacker is employing the "Tailgating" social engineering technique. This involves following an authorized person into a secure area without their knowledge or consent, often by pretending to be an employee or someone with a legitimate reason to enter the area.

When Alice verifies the digital signature using Bob's public key, it ensures that the document was not tampered with. Digital signatures provide data integrity, and if the signature is valid, it means the document has not been altered since it was signed by Bob.

User Awareness Training is a proactive security measure that educates employees on recognizing and reporting suspicious activities, requests, or messages. This helps organizations prevent falling victim to various forms of cyberattacks, including phishing and social engineering.

A "Trojan Horse" is a type of malware that disguises itself as a benign program but contains malicious code, named after the Greek myth.

An "insider threat" refers to a security breach caused by unintentional or malicious actions by employees or individuals with privileged access to the organization's systems. This threat can result from actions like sharing sensitive data, falling victim to phishing attacks, or intentionally causing harm.

Symmetric Encryption is a technique where the same key is used for both encryption and decryption. It transforms plaintext into ciphertext using a mathematical algorithm and a secret key. The key size determines the number of possible transformations, which affects the security of the encryption.

The Health Insurance Portability and Accountability Act (HIPAA) Security Rule primarily addresses the security of protected health information (PHI) and electronic health records. It sets standards for securing health information, ensuring the confidentiality, integrity, and availability of patient data.