Nine interlocking security layers protect every transaction, every byte of data, and every identity on the ATSHI network. Not best practices — mathematical guarantees. Not perimeter defense — defense at every layer. From consensus to cryptography, from access control to self-healing, every layer is a fortress.
Each layer defends independently — an attacker must break all nine to compromise the system, and breaking even one is designed to be computationally infeasible
ARCH consensus tolerates over 90% malicious nodes, far exceeding the traditional 33% BFT threshold. Even if the vast majority of the network is compromised, the honest minority prevails. This is not a theoretical improvement — it is a fundamental redesign of consensus security.
Data is not encrypted at the record or table level — it is encrypted at the individual field level. A medical record can have the patient name encrypted for doctors only, the billing code encrypted for insurers only, and the diagnosis encrypted for the patient only. Granularity that no other blockchain offers.
Every transaction is validated against its schema before acceptance. Invalid data structures are rejected at the protocol level, not at the application level. This eliminates entire classes of injection attacks, malformed data exploits, and type confusion vulnerabilities.
Role-based access control is not a smart contract library — it is built into the protocol itself. 16 fine-grained roles with 5 permission effects (allow, deny, inherit, delegate, revoke) govern every operation. Unauthorized actions are rejected before they reach the execution layer.
Decentralized identity with crypto-biometric authentication (Face ID, fingerprint, hardware devices) ensures unique person identification, preventing a single attacker from creating multiple identities to game consensus, voting, or reputation systems. Self-sovereign identity — enforced cryptographically, no third-party dependency.
Sensitive data encrypted with Fully Homomorphic Encryption can only be decrypted when a threshold of authorized parties cooperate. No single node, no single admin, no single government agency can unilaterally access encrypted data. Mathematically enforced separation of power.
Cryptographic keys are automatically rotated on a schedule. Compromising a current key does not reveal past communications — each session uses ephemeral keys derived from the rotation schedule. Yesterday's data remains safe even if today's key is stolen.
Falcon-512 lattice-based signatures are resistant to quantum computer attacks. Combined with the next-key-hash disclosure mechanism, the network is quantum-safe today — not as a future upgrade, but as a current production feature.
The network automatically detects and isolates compromised or malfunctioning nodes. Consensus continues without disruption, data is re-replicated to healthy nodes, and the compromised node is quarantined pending investigation. The network heals itself faster than an attacker can spread.
Security Layer Stack
RBAC Permission Model
Not just encrypted storage — computation on encrypted data with mathematically enforced access control
Each field in a transaction can have its own encryption key and access policy. In a single medical record, the patient name is encrypted for the doctor, the billing code for the insurer, and the lab results for the specialist. One record, multiple encryption contexts, zero data leakage.
Fully Homomorphic Encryption enables computation on encrypted data without ever decrypting it. When decryption is needed, a threshold of authorized parties must cooperate — no single entity can unilaterally access the plaintext. Power is distributed by mathematics, not by policy.
Automatic key rotation ensures that compromising a current key does not reveal historical data. Each rotation period generates new ephemeral keys, making retroactive decryption impossible even with unlimited computational power.
Per-field encryption with RBAC satisfies GDPR's data minimization principle, HIPAA's minimum necessary standard, and financial regulations requiring separation of duties. Security that is not just strong, but auditable and legally defensible.
Encryption Granularity
Security that is mathematically proven, not just best-practice. Defense at every layer, not just the perimeter. Compliance-ready by design, not by afterthought.
90%+ Byzantine tolerance is not a marketing claim — it is a proven property of ARCH consensus. Per-field encryption uses AES-256-GCM with formal security proofs. Falcon-512 has NIST standardization. Every security claim is backed by mathematics.
Proven · Not PromisedNine independent security layers mean an attacker must breach consensus, encryption, schema validation, RBAC, biometrics, FHE thresholds, forward secrecy, post-quantum crypto, AND the self-healing network. Breaking one achieves nothing.
9 Layers · IndependentPer-field encryption satisfies GDPR data minimization. RBAC enforces separation of duties for financial regulations. Audit trails are immutable on-chain. Schema validation prevents data quality issues. Built for regulated industries.
GDPR · HIPAA · MiFID IIFalcon-512 lattice-based signatures resist quantum attacks. Next-key-hash disclosure prevents key exploitation even if curves are broken. Post-quantum security is a production feature, not a roadmap item.
Falcon-512 · Production-ReadyCompromised nodes are automatically detected, isolated, and quarantined. Data re-replicates to healthy nodes. Consensus continues without disruption. The network repairs itself faster than an attacker can spread.
Auto-Detect · Auto-HealDecentralized identity with crypto-biometric authentication ensures unique person identification. No Sybil attacks on consensus, no vote manipulation, no fake reputation farming. Self-sovereign identity is the foundation of network security.
Proof of Identity · Self-SovereignMost blockchains rely on a single security mechanism — consensus. ATSHI builds nine independent layers of defense, each one stronger than what most platforms offer in total.
| Security Feature | Ethereum | Hyperledger Fabric | Cosmos | Traditional Cloud | ATSHI Network |
|---|---|---|---|---|---|
| Byzantine Tolerance | 33% (Casper FFG) | 33% (Raft/PBFT) | 33% (Tendermint) | N/A | 90%+ (ARCH Consensus) |
| Data Encryption | None native | Channel-level only | None native | Application-level | Per-field AES-256-GCM |
| Schema Validation | No (application-level) | Chaincode-level | No | Application-level | On-chain protocol-level |
| Access Control | Smart contract logic | Channel + chaincode | Smart contract logic | IAM policies | Protocol RBAC (16 roles, 5 effects) |
| Sybil Resistance | Economic (PoS stake) | Permissioned (CA) | Economic (PoS stake) | Identity provider | Biometric verification |
| Confidential Compute | No | Private data collections | No | TEE / HSM | FHE threshold decryption |
| Forward Secrecy | No | No | No | TLS only | Auto key rotation |
| Quantum Resistance | None | None | None | None | Falcon-512 + next-key hash |
| Self-Healing | Slashing (reactive) | No | Slashing (reactive) | Auto-scaling | Auto-detect, isolate, re-replicate |
Every other blockchain asks you to trust that 33% of validators are honest. ATSHI works even if 90% are compromised. Every other platform encrypts at the application level and hopes developers get it right. ATSHI encrypts at the field level, enforces schemas at the protocol level, and validates access with 16-role RBAC before your transaction even reaches execution. Nine layers. Mathematically proven. Quantum-resistant. Self-healing. This is what security looks like when you refuse to compromise.