Rivest, Shamir, And Adelman (RSA): A widely-used public key cryptosystem named after its inventors Ronald Rivest, Adi Shamir, and Leonard Adelman. In RSA, the encryption key is public and different from the decryption key, which is kept secret, making it an asymmetric cryptosystem. The security of RSA relies upon the practical difficulty of factoring the product of two large prime numbers.

Rogue administrators in virtualization: The individuals who, within a virtualized environment, have the ability to exploit their high-level access privileges for malicious intent. A rogue administrator may execute harmful actions such as data theft, unauthorized system modification, or disruption of services, all of which could lead to significant security breaches. Measures such as strict access controls, monitoring, and logging are used to mitigate the potential threat posed by rogue administrators.

Rogue wireless access point: A wireless access point that has been installed on a secure network without explicit authorization from a local network administrator. This can present a security risk as it provides an open door for attackers to enter the network undetected, potentially leading to unauthorized access to sensitive data or disruptive activities.

Role-Based Access Control (RBAC): A method of limiting access to computer systems based on the roles and responsibilities of individual users. It is used to ensure that only authorized users have access to sensitive information and resources. Examples include limiting access to financial data to only accounting personnel or restricting access to confidential documents to only senior management.

Rollback: The reversal of changes to a system, often used to restore the system to a previous state in the event of a problem. It is used to undo changes that have caused issues or to return to a well-known state. Examples include rolling back a software update that caused system instability or rolling back a configuration change that resulted in a loss of network connectivity.

Root cause analysis: A thorough investigation method aimed at discovering the fundamental reason behind a problem or incident. It involves analyzing the sequence of events or conditions that led to the undesired outcome, with the goal of addressing these underlying issues to prevent recurrence. Root cause analysis is pivotal in cybersecurity to prevent future breaches by addressing the source, not just the symptoms, of security failures.