Concept:
In the field of cybersecurity, malicious code is often categorized by its delivery method and its "trigger" mechanism. A specific type of malware is designed to remain dormant within a legitimate program until a specific "logical" condition is met.
Step 1: Defining the Logic Bomb.
A Logic Bomb is a string of malicious code inserted into software that remains inactive until a specific event occurs. This event, or "trigger," could be a specific date (like Friday the 13th), a specific time, or even a specific action performed by a user, such as deleting a certain file or logging into a specific account.
Step 2: Distinguishing from other terms.
• Email Spoofing is a technique used to make an email appear as if it came from a trusted source.
• ISDN is a communication standard for digital transmission.
• A CPU bomb is a rare term referring to code meant to overwhelm a processor, but it does not specifically imply the "time/state trigger" characteristic of a logic bomb.
Step 3: Conclusion.
Because the question emphasizes a disturbance triggered by a "present time" or "pre-defined state," the correct technical term is a Logic Bomb.