Runtime Security
Canonical definition (one sentence)
Runtime Security: A technical system that detects attacks, anomalies, and unauthorized activities in real time during the state in which a processor executes its instruction set and data is loaded into memory (runtime), maintaining the system’s Controllability.
Essential definition of Runtime
“Runtime” refers to the general state of execution in which a processor executes its instruction set (ISA) and program code and execution data are loaded into RAM (memory). Shared across Runtime Stability, Runtime Security, and Runtime Immunity.
Three design principles of Runtime Security
Principle 1: Detection-Driven Approach — response starts from detection; optimize precision and speed; acknowledge detection gaps and coordinate with Runtime Immunity.
Principle 2: Dynamic Control and Constraint — after detection, constrain attack behavior without halting overall system operation (isolation, restriction, blocking).
Principle 3: Real-Time Responsiveness — minimize time from detection to response; shorter latency reduces success probability and damage scale.
Characteristics derived from Runtime Stability
Characteristic 1: Non-Halting — minimize process/service halting during detection → control response.
Characteristic 2: Homeostasis Maintenance — maintain Protection Attributes at pre-attack equivalence through detection and control.
Positioning within Runtime Stability (and contribution to 7 attributes)
Runtime Security is detection-based protection within the Runtime Stability framework.
It plays a primary role in Safety, Availability, and Controllability; and contributes to Inexploitability through dynamic elimination, which requires coordination with Runtime Immunity for high Inexploitability levels.
Problem statement (why Runtime Security exists)
Perimeter defense-centric security weakens in modern environments (cloud, containers, microservices). Once breached, maintaining control becomes difficult. Runtime Security directly protects the post-breach runtime environment.
Implementation forms (examples)
Implementation methods can be classified by protection targets and detection technologies.
- Process Memory Monitoring (eBPF/kprobes/uprobes, etc.)
- Runtime Application Self-Protection (RASP)
- Cloud Workload Protection Platform (CWPP)
- Endpoint Detection and Response (EDR)
Achievement evaluation framework (SL 0–3, 3-axis)
Runtime Security Level (SL) is evaluated by three axes: Recall, Precision, and Response Latency.
Maturity stages progress from Basic Detection → Multi-Layer Detection → Integrated Detection.
Canonical text (copy-ready)
Runtime Security: A technical system that detects attacks, anomalies, and unauthorized activities in real time during the state in which a processor executes its instruction set and data is loaded into memory (runtime), maintaining the system’s Controllability.