Runtime Immunity Definition Document v1.1
Essential Definition and Technical Framework of Runtime Immunity
v1.1 (Fully Integrated Edition) · March 2025 · Public Edition
§1Conceptual Definition
§1.1Single-Sentence Definition of Runtime Immunity
Runtime Immunity: A technology framework that structurally nullifies the preconditions or outcomes of attacks even when attacks reach the system, maintaining protection attributes without halting the system.
§1.2Expanded Definition: Structure-Based Protection
"Severing the Causal Relationship Between Breach and Damage"
Conventional security has implicitly assumed that "defense breach = damage occurrence." Runtime Immunity is a technology framework that structurally severs this causal relationship itself. Even when an attack "reaches" the system, the "outcome" holds no usable value.
Why "Structural Nullification"?
Because it does not depend on detection, it can address unknown threats (0-day). Because it requires no human response, it provides consistent 24/7 protection. Furthermore, by structurally severing the causal relationship between attack success and damage occurrence, it structurally minimizes legal and financial risk (damages claims, fines, GDPR penalties) and structurally makes it difficult for breach notification obligations to arise.
⚠️ NOTICE: Regarding "Structurally Infeasible": "Structurally infeasible" does not mean "100% impossible." Claims of completeness may become a legal vulnerability; therefore, this definition adopts expressions such as "structural minimization" and "computationally infeasible."
§1.3Two Design Principles of Runtime Immunity
Principle 1: Detection Independence
The effectiveness of protection mechanisms does not depend on the success or failure of attack detection. Even when detection gaps exist, attack outcomes are structurally nullified. This is the fundamental difference from Runtime Security and the greatest strength of Runtime Immunity.
Principle 2: Structural Embedding
Protection is embedded into the system architecture and does not depend on runtime detection or decision-making. This includes protections implemented at the design stage, such as memory encryption, process isolation, and environment binding.
§1.4Characteristics Derived from Runtime Stability Design Philosophy
Characteristic 1: Non-Halting
The system is not halted even under attack. This is an essential characteristic for protecting "unstoppable systems" such as autonomous vehicles, medical devices, and industrial control systems.
Characteristic 2: Homeostasis Maintenance
The system's protection attributes remain unchanged before and after an attack. Similar to biological homeostasis, the system autonomously maintains a stable state internally.
§1.5Position within Runtime Stability and Contribution to 7 Attributes
Runtime Immunity is positioned as structure-based protection within the Runtime Stability framework. It makes a direct contribution particularly to Inexploitability.
Table 1: Runtime Immunity's Contribution to the 7 Attributes
| Attribute | Contribution | Runtime Immunity's Role | Relationship with Runtime Security |
|---|---|---|---|
| Safety | ★★★★★ | Structurally prevents transitions to dangerous states | Coordinates with monitoring and detection |
| Reliability | ★★★★★ | Guarantees automatic continuation of protection functions | Coordinates with monitoring and recovery |
| Availability | ★★★☆☆ | Somewhat limited structurally | Primary responsibility of Security |
| Controllability | ★★★★☆ | State awareness and steering mechanisms | Coordinates with dynamic control |
| Confidentiality | ★★★★★ | Fundamental protection through encryption | Coordinates with detection and restriction |
| Data Integrity | ★★★★★ | Implements tamper-proof structures | Coordinates with detection and prevention |
| Inexploitability | ★★★★★ | Structural nullification of attack outcomes | Limited in Security alone |
§2Problems Addressed
§2.1Limitations of Detection-Dependent Security
Detection-based security such as Runtime Security has inherent limitations. Detection gaps inevitably exist, unknown threats (0-day) cannot be addressed, and temporal delays allow damage to occur.
Runtime Immunity fundamentally resolves these limitations by structurally nullifying attack outcomes regardless of detection success or failure.
§3Technical Definition
§3.1Realization Structure of Runtime Immunity
Runtime Immunity nullifies attack outcomes through three realization forms corresponding to each stage of the attack chain.
§3.2Three Realization Forms
Form 1: Target Elimination
Achieves a state where attackers cannot identify or locate attack targets. Example: In an environment where critical server locations are concealed on the network and all process memory is uniformly encrypted, attackers cannot locate valuable data.
Form 2: Precondition Removal
Achieves a state where the "tools" and "conditions" required for an attack are structurally absent. Example: Encryption keys are not persistently stored but dynamically derived from the physical environment only at execution time. Access privileges required by malware are structurally eliminated.
Form 3: Spoils Nullification
Even when an attack reaches and executes, the obtained outcomes hold no usable value. Example: A successful memory dump yields only undecryptable ciphertext. Stolen authentication credentials are bound to the execution environment and are unusable in other environments.
§4Nullification Level Definition
§4.1Why Level Definitions Are Necessary
The degree of "structural nullification" varies by implementation. Since claiming completeness poses legal risk, nullification is defined quantitatively.
§4.2Two-Axis Nullification Evaluation Framework
Key Recognition: The information-theoretic axis and economic rationality axis are independent axes.
Axis A: Information-Theoretic Nullification
Mathematical decryption infeasibility based on Shannon's theorem. Evaluation based on classical computer computational capabilities.
NL-1 (Partial Information-Theoretic Nullification)
- Condition: 50% or more of data obtainable through attack is computationally infeasible to decrypt
- Example: 50% of process memory encrypted with security parameter of 128/256 bits or higher
- Risk: Partial encryption means potential information leakage from unencrypted regions
NL-2 (Comprehensive Information-Theoretic Nullification)
- Condition: 95% or more of data obtainable through attack is computationally infeasible to decrypt
- Example: All process memory encrypted with security parameter of 128/256 bits or higher, keys not stored
- Assurance: Computationally infeasible to decrypt as long as implementation conditions are met
Axis B: Economic Nullification
A state where "investment cost > obtainable benefit" is mathematically established from the attacker's perspective.
NL-3 (Practical Nullification)
- Prerequisite: NL-2 (comprehensive encryption) must be implemented
- Additional implementation: Per-session environment binding, one-time tokenization of credentials, privilege minimization
- ROI analysis: Even if decryption succeeds, attacker's practical benefit is eliminated
- Assessment: Theoretically the strongest class
§4.3Preparation for Post-Quantum Nullification (PQN)
Premises of current NL definitions:
- Shannon's theorem (classical cryptography)
- Security parameter of 128/256 bits or higher
Quantum-era threats:
- Practical quantum computers: Expected 2030s–2040s
- Shor's algorithm: Potential to break RSA, ECC, etc.
⚠️ NOTICE: Position of this document (v1.1): Recorded as a definition for the classical cryptography era. Valid as implementation criteria for 2025–2030. Updates are required for the post-quantum era after 2030.
§5Achievement Evaluation Framework
§5.1Runtime Immunity Level (IL-0 to IL-3) and Nullification Levels
| Level | Description | NL Correspondence |
|---|---|---|
| IL-0 | No structural protection | No structural protection in runtime environment |
| IL-1 | NL-1 (partial nullification) achieved | Partial implementation of a single form |
| IL-2 | NL-2 (comprehensive nullification) achieved | Integrated implementation of multiple forms (2+) |
| IL-3 | NL-3 (practical nullification) achieved | Comprehensive implementation of all three forms |
§6Relationship with Existing Technologies
§6.1Relationship with Confidential Computing (TEE, SGX, etc.)
Runtime Immunity is a technology framework that may include but is not limited to Confidential Computing. TEE and SGX are excellent realization means for Runtime Immunity, but they have the limitation of hardware dependency.
§7Application Domains
Runtime Immunity applies to "unstoppable systems," "systems that cannot tolerate damage," and "systems requiring comprehensive protection."
- Autonomous vehicles and connected cars
- Medical devices and healthcare information systems
- Core business systems in financial institutions
- Industrial control systems and smart grids
- Critical social infrastructure
- Defense-related systems
§8Glossary
- Nullification: A state where data obtained through attack holds no usable value for the attacker
- Information-Theoretic Nullification: An encryption state that is computationally infeasible to decrypt
- Economic Nullification: A state where the attacker's ROI is negative even if decryption succeeds
- Post-Quantum Cryptography (PQC): Cryptographic technology resistant to quantum computers
- Environment Binding: Technology that dynamically binds authentication information to the execution environment
§9Revision History
- v1.0 (March 2025): Initial release
- v1.1 (March 2025) Precision Edition: Explicit separation of NL axes. Added PQN preamble.
- v1.1 (March 2025) Fully Integrated Edition: Integrated v1.1 revisions into the complete v1.0 body.
§10About This Document
§10.1Purpose
This definition document establishes the essential definition of Runtime Immunity and systematically positions the technology framework for structurally nullifying attack outcomes within the Runtime Stability framework.
§10.2Cross-References
- Runtime Stability Definition v3.3: Overall framework concepts and 7-attribute integration
- Runtime Security Definition v1.1: Detection-based protection system (3-axis SL evaluation, including RS-6 limitations)
*Runtime Stability — Technology that controls an unstoppable world. Breached, yet unshaken.*