Which of the following is the best countermeasure to encrypting ransomwares?


A. Use multiple antivirus softwares
B. Keep some generation of off-line backup
C. Analyze the ransomware to get decryption key of encrypted data
D. Pay a ransom

An unauthorized individual enters a building following an employee through the employee entrance after the lunch rush. What type of breach has the individual just performed?


A. Reverse Social Engineering
B. Tailgating
C. Piggybacking
D. Announced