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Shiba Inu SHIB
Shiba Inu (SHIB) is a standard, immutable ERC-20 token on Ethereum with no custom cryptography, admin keys, or upgrade authority in the token contract. Under QRI Section 7.2 (Token Inheritance), SHIB inherently shares Ethereum L1's quantum-vulnerable ECDSA/secp256k1 security model for spend authorization and state integrity. The Shiba Inu ecosystem extends to Shibarium, a Polygon Edge/Plasma-fork L2 sidechain using classical ECDSA for consensus and bridge validation — both quantum-vulnerable. The Shibarium bridge suffered a major classical exploit in September 2025, underscoring the fragility of its signature-based security. While the ecosystem has acknowledged quantum risk in official publications and announced a Zama FHE partnership (privacy/confidentiality, not spend-authorization replacement), no formal cryptographic inventory, quantum threat model, PQ migration plan, or production PQ protection exists. The project scores 0 on all five QRI categories. Stage 0 cap (5) and Readiness & Risk caps (10 for no cryptographic inventory, 50 for vulnerable two-way bridge, 40 for ECC-only spend authorization) all exceed the Factor Score of 0, yielding a QRI Score of 0. The ecosystem has shown awareness of quantum risk through official publications, but this awareness does not constitute a formal risk assessment and provides no production protection.
Not AssessedRoadmap OnlyToken Inheritance: Ethereum L1ECC-Only Spend AuthorizationQuantum-Vulnerable BridgeNo Cryptographic Inventory
Category breakdown
QRI Factors
Algorithm & Implementation Assurance
0 / 20
Migration Mechanism, Governance & Ecosystem Coordination
0 / 15
Migration Status & Value-at-Risk
0 / 25
Production Cryptographic Protection
0 / 35
Security Assessment & Evidence Preparedness
0 / 5
Critical Quantum Blockers
- No public cryptographic inventory or quantum threat model published by the project team (Stage 0 cap: 5)
- All SHIB spend authorization relies entirely on Ethereum L1 ECDSA/secp256k1 signatures — fully quantum-vulnerable with long-exposure public keys for all transacted EOAs
- Shibarium L2 consensus and validator authentication use classical ECDSA signatures with no documented PQ mitigations
- Shibarium bridge relies on classical validator multisig/checkpoint signatures; a quantum adversary could forge bridge exits to drain locked L1 assets (two-way bridge cap: 50)
- Shibarium bridge critical contracts upgradeable by EOA with no delay, creating additional quantum-era governance risk
- No migration mechanism, PQ wallet support, or quantum-safe transaction path exists for SHIB holders
Key Risks
- SHIB token balances (~$X billion market cap) are secured exclusively by Ethereum ECDSA/secp256k1 signatures. A quantum computer capable of breaking secp256k1 could derive private keys from the ~1.58M+ EOAs that have transacted SHIB, enabling theft of all exposed balances with no time constraint (long-exposure attack window).
- Shibarium L2 validators use classical ECDSA signatures for consensus. Quantum compromise of validator keys could finalize fraudulent state transitions, including malicious bridge exits that drain all locked L1 assets.
- The Shibarium bridge (Plasma/PoS bridge) relies on 2/3+1 validator checkpoint signatures. A quantum attacker controlling or forging validator signatures could authorize unauthorized withdrawals of bridged SHIB, ETH, BONE, LEASH, and other assets from Ethereum escrow contracts.
- Shibarium critical contracts (RootChain, StakeManager, WithdrawalManager, Governance, all Predicate escrows) are upgradeable by a single EOA with no timelock (per L2BEAT), creating a quantum-era governance risk where a compromised admin key could drain all bridge-escrowed value.
- SHIB has cross-chain representations (BSC BEP-20, potentially others) secured by separate bridge validator sets, each introducing independent quantum-vulnerable signature surfaces.
- There is no migration path, PQ wallet support, hybrid signature scheme, or quantum-safe transaction mechanism available to SHIB holders. In a quantum emergency, there would be no way to protect SHIB balances beyond hoping Ethereum L1 deploys PQ signatures in time.
- The project has not published a cryptographic inventory, making it impossible to independently verify the full scope of quantum-vulnerable surfaces across the ecosystem (ShibaSwap, BONE/LEASH/TREAT contracts, Shib Identity, Shib Alpha Layer, etc.).
Assurance Notes
- No formal quantum-specific cryptographic inventory or threat model has been published by the Shiba Inu development team.
- The SHIB ERC-20 token contract (0x95ad61b0a150d79219dcf64e1e6cc01f0b64c4ce) is verified on Etherscan and is immutable with no admin keys, owner, or upgrade authority in the token contract itself.
- Shiba Inu ecosystem publications (The Shib Magazine, The Shib Daily) have acknowledged quantum computing risks and described a partnership with Zama for Fully Homomorphic Encryption (FHE), but these are awareness/educational articles, not formal risk assessments with cryptographic inventories and attack models.
- The Zama FHE integration targets privacy/confidentiality (encrypted transaction data on Shibarium), not replacement of ECDSA spend authorization. Even if deployed, FHE does not address the core quantum vulnerability of ECDSA-based transaction signing on Ethereum L1 or Shibarium.
- The Shibarium bridge suffered a major validator-key compromise exploit in September 2025 (~$2.3M-$3M), demonstrating real-world vulnerability of the classical ECDSA-based validator signature and bridge security model. Post-incident hardening has been performed but the underlying cryptographic mechanisms remain classical.
- Per L2BEAT, Shibarium critical contracts can be upgraded by an EOA with no delay, and state validation relies on 2/3+1 validator signatures without on-chain verification of state transition validity.
- No independent quantum-specific audit exists for any component of the SHIB ecosystem.
- The Ethereum Foundation has allocated $2M toward post-quantum migration (Kohaku upgrade, Dilithium signatures), but Shibarium's sidechain architecture requires manual integration that has not occurred as of the evaluation date.
- The Shib Alpha Layer and FHE integration target H2 2026 completion but are not in production as of the evaluation date.
Non-Scoring Caveats
- Shiba Inu ecosystem has acknowledged quantum risk in official publications (The Shib Magazine, The Shib Daily) and announced a Zama partnership for FHE, indicating awareness but not yet a formal risk assessment or production protection.
- The Zama FHE integration (target Q2 2026 / H2 2026) may provide confidentiality for Shibarium transaction data using lattice-based cryptography, but this does not replace ECDSA spend authorization on Ethereum L1 and is not yet verifiably live in production.
- The Ethereum ecosystem's Kohaku upgrade and broader PQ migration (Dilithium signatures) are under active development. If/when Ethereum L1 deploys PQ signatures, SHIB as an ERC-20 token could potentially inherit those protections, but Shibarium's sidechain architecture requires separate, manual integration.
- The SHIB token contract itself is immutable with no admin keys — token-specific governance risk is minimal for the core ERC-20 contract.
- No formal quantum-specific incident-response playbook or emergency disclosure process exists for quantum vulnerabilities.
- The September 2025 Shibarium bridge exploit ($2.3M-$3M) was a classical attack (validator key compromise, not quantum), but it demonstrates the real-world fragility of the classical signature-based security model that would also be vulnerable to quantum attack.
- SHIB has cross-chain representations (e.g., BSC BEP-20 at 0x2859e4544c4bb03966803b044a93563bd2d0dd4d) that introduce additional quantum-vulnerable bridge/wrapper surfaces outside the scope of the Ethereum ERC-20 evaluation.
Evidence record
Claims and Caveats
Security Assessment & Evidence Preparedness
Public cryptographic inventory and quantum threat model (weight: 3)
Claim: No public cryptographic inventory or quantum threat model has been published by the Shiba Inu team.
Coverage basis: Absence of evidence confirmed by evidence dossier and independent web search of official channels (shib.io, docs.shibariumtech.com, blog.shibaswap.com, magazine.shib.io, news.shib.io).
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Quantum blocker: No public cryptographic inventory — Readiness & Risk Cap applies (max QRI 10)
Assurance: Ecosystem publications (The Shib Magazine, The Shib Daily) have published articles acknowledging quantum risk and describing the Zama FHE partnership, but these are educational/marketing articles and do not constitute a formal cryptographic inventory with attack assumptions, affected assets, or affected layers.
High evidence confidence for the absence claim: systematic search of all official channels confirms no formal cryptographic inventory or threat model exists. The project is not PQ-native (Section 7.1 does not apply); it is an ERC-20 token that inherited a classical ECC ownership namespace from Ethereum.
Security Assessment & Evidence Preparedness
Public evidence record supporting the assessment (weight: 2)
Claim: No formal quantum risk assessment exists; therefore no supporting evidence record (code references, specs, audits, transaction examples, reproducible analytics) has been published.
Coverage basis: Absence of formal assessment confirmed by evidence dossier and independent search.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Assurance: No quantum-specific audits, code analysis, or reproducible quantum-risk analytics exist for SHIB or Shibarium.
This subfactor cannot be scored without a pre-existing assessment to provide evidence for. The absence is conjoined with subfactor 1.1.
Production Cryptographic Protection
Spend authorization / transaction signatures (weight: 9)
Claim: SHIB is a standard ERC-20 token on Ethereum. All transfers are authorized by Ethereum ECDSA/secp256k1 signatures. No PQ or hybrid signature path exists at the token or host-chain level.
Coverage basis: Token contract verified on Etherscan; Ethereum L1 uses secp256k1 for EOAs.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Quantum blocker: All spend authorization is ECC-only; long-exposure public keys exist for all transacted EOAs. Readiness & Risk Cap: 40 (ECC-only spend authorization).
Assurance: High confidence: token contract is verified and source code confirms no custom cryptographic primitives. Ethereum's secp256k1 dependency is well-documented and universally acknowledged.
Under QRI Section 7.2 (Token Inheritance), SHIB inherits Ethereum L1's spend authorization security model. No token-specific signature mechanisms exist.
Production Cryptographic Protection
Account, address, public-key exposure, and key-derivation design (weight: 7)
Claim: All SHIB ownership relies on Ethereum EOAs. ~1.58M+ holders; any EOA that has sent a transaction has an exposed public key (long-exposure attack window). No PQ/hybrid address scheme or key-derivation controls exist.
Coverage basis: Etherscan holder count and transaction history; Ethereum EOA public-key exposure model.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Quantum blocker: Long-exposure quantum-vulnerable public keys for all transacted EOAs. Material value-at-risk with no migration, freeze, or deprecation path.
Assurance: Standard ERC-20 behavior; quantum risk is identical to Ethereum native assets. No PQ-native address scheme or hybrid key derivation exists.
Long-exposure (at-rest) attack window: public keys of all EOAs that have transferred SHIB are permanently visible on-chain. Attack can occur offline with no time constraint per QRI Section 7.3.
Production Cryptographic Protection
Consensus-critical authentication (weight: 6)
Claim: SHIB as a token depends on Ethereum L1 consensus (PoS with BLS signatures) for finality. Shibarium L2 uses classical ECDSA for its Heimdall/Tendermint-based PoS consensus. Neither has PQ protection.
Coverage basis: Ethereum PoS specification (BLS12-381); Shibarium documentation confirming Heimdall/Bor fork of Polygon Edge using ECDSA.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Quantum blocker: Ethereum L1 BLS-based consensus and Shibarium ECDSA-based consensus are both quantum-vulnerable. Consensus finality cap: 70.
Assurance: Per QRI Section 7 applicability rules: 'Token depends on an L1 or bridge security model → Host-chain or bridge dependency is applicable, not N/A.' Shibarium documentation clearly states Heimdall uses Tendermint-based PoS with ECDSA validator signatures.
Consensus authentication is applicable because the token's security depends on both Ethereum L1 finality and (for bridged/wrapped assets) Shibarium validator consensus. Per L2BEAT: Shibarium state updates are settled if signed by 2/3+1 validators without on-chain validity verification.
Production Cryptographic Protection
State-integrity and data-availability mechanisms (weight: 6)
Claim: SHIB state (ERC-20 balances) is protected by Ethereum's state integrity (Merkle Patricia trees). However, state mutation is authorized exclusively by ECDSA-signed transactions. Shibarium state integrity depends on classical validator signatures with no on-chain validity verification.
Coverage basis: Ethereum state model; Shibarium documentation and L2BEAT analysis.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Quantum blocker: State mutation is gated by quantum-vulnerable ECDSA signatures on both Ethereum L1 and Shibarium L2.
Assurance: Per L2BEAT: 'Currently the system permits invalid state roots' — Shibarium has no on-chain state validation. State integrity depends entirely on validator honesty enforced by classical signatures.
While Ethereum's Merkle Patricia trees are hash-based (quantum-safe for integrity of committed state), the ability to mutate state (transfer SHIB, mint/burn wrapped representations) depends entirely on ECDSA authorization. A quantum attacker with a broken ECDSA key can authorize arbitrary state mutations.
Production Cryptographic Protection
Privacy and proof layers (weight: 3)
Claim: SHIB is a transparent ERC-20 token with no native privacy features, ZK proofs, shielded transactions, or confidential transfer mechanisms.
Coverage basis: Token contract verification and ecosystem documentation.
Implementation score: 1 · Evidence confidence: High
Issue classification: none · Score treatment: not applicable
Assurance: The Zama FHE partnership and Shib Identity initiatives are roadmap items targeting future privacy capabilities, not current production protection. They are noted for awareness but do not change N/A status.
N/A justified. The SHIB ERC-20 token has no privacy/privacy layer that could be quantum-vulnerable. Future FHE integration would introduce new applicable subfactors in a subsequent evaluation scope.
Production Cryptographic Protection
P2P transport, node identity, and peer authentication (weight: 2)
Claim: SHIB is an ERC-20 token with no independent P2P network. P2P concerns are handled entirely by Ethereum L1.
Coverage basis: Token architecture: standard ERC-20 with no network layer.
Implementation score: 1 · Evidence confidence: High
Issue classification: none · Score treatment: not applicable
Assurance: N/A is appropriate for a standard token. Shibarium L2 has its own P2P layer, but SHIB as an ERC-20 token on Ethereum L1 does not.
The Shibarium L2 node network uses classical authentication but that is infrastructure for the L2, not the SHIB ERC-20 token itself.
Production Cryptographic Protection
Critical wallet, custody, HSM, signer, and hardware-wallet workflows (weight: 2)
Claim: SHIB relies on standard Ethereum wallet infrastructure (MetaMask, Ledger, Trezor, etc.) which uses ECDSA/secp256k1 signing. No PQ/hybrid wallet path exists for SHIB transactions.
Coverage basis: Standard ERC-20 wallet compatibility; no PQ wallet integration documented.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Quantum blocker: No PQ wallet, custody, or HSM path exists. All SHIB signing workflows remain ECDSA-only.
Assurance: Ledger, MetaMask, and other major wallets support SHIB as a standard ERC-20. None offer PQ signing for Ethereum transactions as of the evaluation date.
This subfactor is applicable because SHIB requires wallet software to sign transactions. The absence of PQ wallet support means even if Ethereum L1 deployed PQ signatures, SHIB holders would need compatible wallet infrastructure that does not currently exist.
Migration Status & Value-at-Risk
Percentage of economically relevant value-at-risk protected (weight: 20)
Claim: 0% of SHIB value-at-risk is protected from quantum key-recovery attacks. No migration, PQ protection, or hybrid path exists. All ~$X billion market cap remains secured exclusively by ECDSA.
Coverage basis: Absence of any migration or PQ protection mechanism across the entire SHIB ecosystem.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Quantum blocker: 0% value-at-risk protected. Material long-exposure quantum-vulnerable value exists with no migration, freeze, deprecation, burn, recovery, or policy path. Readiness & Risk Cap: 55.
Assurance: Coverage is <25% per Section 9.3.1 thresholds → score 1 would apply if there were any protection. Since protection is zero, score is 0.00. SHIB has ~1.58M holders; all transacted EOAs have exposed public keys.
SHIB is not PQ-native (it inherited Ethereum's classical ECDSA ownership namespace). The PQ-native complete-by-design rule (Section 7.1 and 9.3.1) does not apply. All SHIB value exists in ECDSA-controlled addresses on Ethereum L1 or in the quantum-vulnerable Shibarium bridge escrow.
Migration Status & Value-at-Risk
Critical wallets migrated, protected, or inherently PQ-native (weight: 3)
Claim: No SHIB treasuries, exchanges, custodians, bridges, or protocol-controlled wallets have migrated to PQ protection. All critical wallets remain ECDSA-secured.
Coverage basis: Absence of any migration evidence across the ecosystem.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Quantum blocker: Critical wallets (exchange listings, bridge escrow, ecosystem treasuries) remain fully quantum-vulnerable with no migration path.
Assurance: Major exchanges listing SHIB (Coinbase, Binance, etc.) use standard ECDSA custody with no PQ migration announced.
Per QRI Section 7.1, PQ-native tokens would have exchanges/custodians treated as protected for native on-chain control. SHIB is not PQ-native so this exemption does not apply.
Migration Status & Value-at-Risk
Legacy vulnerable pools/accounts/UTXOs/contracts identified, measurable, deprecated, migrated, frozen, or proven not to exist by design (weight: 2)
Claim: No identification, measurement, or deprecation of quantum-vulnerable SHIB balances exists. No mechanism to freeze, migrate, or burn vulnerable holdings has been proposed.
Coverage basis: Absence of any such mechanism or analysis.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Quantum blocker: No identification or deprecation mechanism for vulnerable holdings. Dormant/unmigratable assets (lost keys, abandoned contracts, long-dormant EOAs) cannot be addressed.
Assurance: Per QRI Section 9.3.2, dormant/unmigratable value held in addresses that cannot practically migrate should be counted as unprotected. SHIB has no salvage, freeze, deprecation, or burn policy for quantum-vulnerable value.
SHIB's token contract does include a burn() function usable by any holder, but this is a voluntary mechanism, not a quantum-migration policy. It cannot be used to address unmigratable vulnerable holdings without holder cooperation.
Migration Mechanism, Governance & Ecosystem Coordination
Public migration or protection roadmap with sequencing, activation criteria, and dependencies (weight: 3)
Claim: No public quantum migration roadmap exists for SHIB or the Shiba Inu ecosystem. The Zama FHE partnership targets confidentiality, not spend-authorization migration.
Coverage basis: Absence confirmed by evidence dossier and independent search of all official channels.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Quantum blocker: No migration roadmap exists. The project cannot credibly claim any path to quantum readiness.
Assurance: Ecosystem articles discuss quantum risk awareness and the Zama FHE partnership but do not constitute a migration roadmap with sequencing, activation criteria, or dependencies for spend authorization migration.
SHIB is not PQ-native, so Section 7.1 (PQ-native exemption from migration planning requirements) does not apply. The project must publish a migration roadmap to earn points here.
Migration Mechanism, Governance & Ecosystem Coordination
Migration accessibility and defaults (weight: 5)
Claim: No PQ/hybrid account creation, wallet tooling, transaction paths, custody paths, user-facing warnings, education, or migration prompts exist for SHIB.
Coverage basis: Absence of any such tools or infrastructure.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Quantum blocker: No migration accessibility exists. Users cannot protect their SHIB holdings even if they wanted to.
Assurance: Standard Ethereum wallets (MetaMask, Ledger, etc.) provide no PQ transaction paths for any ERC-20 token as of the evaluation date.
SHIB is not PQ-native. Migration accessibility must be provided for the classical ECDSA ownership namespace that SHIB inherited from Ethereum.
Migration Mechanism, Governance & Ecosystem Coordination
Migration enforcement and coordination (weight: 4)
Claim: No enforcement mechanisms (deprecation, freeze, disabled legacy signing, restricted withdrawals, unsafe-path blocking, mandatory migration deadlines) exist for SHIB. Exchange, custody, bridge, wallet, and infrastructure coordination for quantum migration is absent.
Coverage basis: Absence of any such mechanisms or coordination.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Quantum blocker: No enforcement or coordination exists for quantum migration. The Shibarium bridge exploit demonstrated that even classical incident coordination is challenging.
Assurance: The Shibarium bridge exploit (September 2025) response demonstrated some incident coordination capability (Hexens, Seal 911, PeckShield engagement), but this was for a classical exploit, not a quantum-migration scenario.
Per QRI Section 9.4: 'For PQ-native systems with no classical native ownership space, migration mechanisms can be scored as satisfied by design.' SHIB is not PQ-native, so this exemption does not apply.
Migration Mechanism, Governance & Ecosystem Coordination
Emergency disclosure, incident-response, or governance process for quantum-related vulnerabilities (weight: 3)
Claim: No quantum-specific emergency disclosure process, incident-response playbook, or governance mechanism exists for quantum vulnerabilities in the SHIB ecosystem.
Coverage basis: Absence confirmed by evidence dossier and independent search.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Assurance: The Shibarium bridge incident response (September 2025) showed the team can coordinate during classical security incidents, but no quantum-specific IR process exists. Per QRI Section 8.2: lack of a formal quantum-specific IR playbook does not by itself create a Readiness & Risk Cap, but it does reduce this subfactor score.
The Shiba Inu ecosystem has demonstrated incident response capability for classical exploits (bridge hack). However, a quantum-specific process would need to address unique challenges: no fallback to classical signatures, cross-chain coordination at scale, and potentially simultaneous compromise of all ECDSA-secured assets.
Algorithm & Implementation Assurance
Uses NIST-standardized, standards-track, or broadly reviewed PQC/hybrid-PQC algorithms (weight: 6)
Claim: No PQC or hybrid-PQC algorithms are used in the SHIB token contract, Shibarium consensus, or the Shibarium bridge.
Coverage basis: All cryptographic dependencies are classical (ECDSA/secp256k1 on Ethereum, ECDSA on Shibarium).
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Quantum blocker: No PQC algorithms in use. The Zama FHE partnership uses lattice-based cryptography (TFHE) but is for confidentiality, not spend authorization, and is not yet in production.
Assurance: Zama's TFHE scheme relies on lattice-based assumptions considered post-quantum by NIST, but FHE addresses data confidentiality (encrypted computation), not digital signature forgery resistance. The distinction is critical: FHE cannot replace ECDSA for transaction authorization.
This subfactor measures whether PQC algorithms are used for the quantum-critical scope (spend authorization, consensus, state integrity). FHE for confidentiality is a separate concern that does not satisfy this subfactor.
Algorithm & Implementation Assurance
Independent cryptographic and implementation audit for quantum-critical scope (weight: 6)
Claim: No independent quantum-specific cryptographic or implementation audit exists for any SHIB ecosystem component.
Coverage basis: Absence of any quantum-specific audit confirmed by evidence dossier and independent search.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Assurance: The SHIB token contract is verified on Etherscan and has undergone extensive public scrutiny. However, no quantum-specific audit (evaluating PQC algorithm choice, hybrid construction, side-channel resistance, or migration mechanism security) exists because no PQC implementation exists to audit.
This subfactor cannot be scored positively without a PQC implementation to audit. Per QRI Section 9.5: audit absence is score-reducing when it affects safe use of PQ/hybrid controls. Since no PQ controls exist, the score is 0.
Algorithm & Implementation Assurance
Open-source, reproducible implementation (weight: 3)
Claim: The SHIB ERC-20 token contract is verified and open-source on Etherscan. However, there is no PQC implementation to evaluate for reproducibility.
Coverage basis: Etherscan verified contract; no PQC code exists.
Implementation score: 0 · Evidence confidence: Medium
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Assurance: The token contract is open-source (Solidity 0.5.x, verified on Etherscan). However, this subfactor under Section 9.5 evaluates the quantum-critical implementation, not general code transparency. Since no PQC implementation exists, the score is 0.
The token contract's open-source nature is noted but does not compensate for the absence of any PQC implementation.
Algorithm & Implementation Assurance
Parameter agility and future upgrade path (weight: 2)
Claim: No documented parameter agility or PQC upgrade path exists for the SHIB token or Shibarium. The token contract is immutable; Shibarium bridge contracts are upgradeable by EOA with no delay.
Coverage basis: Token contract immutability; Shibarium upgrade patterns per L2BEAT.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Quantum blocker: The SHIB token contract is immutable — it cannot be upgraded to support PQ signatures even if Ethereum L1 deploys them. Shibarium contracts are upgradeable by EOA with no delay, introducing governance risk.
Assurance: Per L2BEAT: Shibarium critical contracts (RootChain, StakeManager, WithdrawalManager, Governance, all Predicate escrows) can be upgraded by a single EOA with no timelock. This creates a dual risk: immutability for the token contract (can't upgrade) and insecure upgradeability for bridge contracts (can be maliciously upgraded).
The immutable SHIB token contract means that even if Ethereum deploys account abstraction or PQ signature schemes, the SHIB token contract itself cannot be modified to enforce new signature requirements. Migration would have to occur through wrapping, redeployment, or social coordination — none of which has been planned or documented.
Algorithm & Implementation Assurance
Stateful-signature safety, side-channel, fault-injection, and custody implementation risks (weight: 2)
Claim: No PQC signatures are used, so stateful-signature safety (XMSS/LMS anti-reuse controls, signing-state discipline) is not applicable. No side-channel or fault-injection analysis for PQC exists.
Coverage basis: No PQC implementation exists.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Assurance: This subfactor evaluates specific risks of PQC implementations. Since no PQC implementation exists, the score is 0 by default — there are no PQC safety measures because there is no PQC to protect.
If the ecosystem were to adopt XMSS/LMS or other stateful hash-based signatures in the future, state-management discipline would become a critical implementation concern.
Algorithm & Implementation Assurance
Performance and resource-impact analysis for PQ deployment (weight: 1)
Claim: No performance or resource-impact analysis exists for PQC deployment in the SHIB ecosystem. PQC signature sizes and verification costs have not been evaluated for Shibarium block validation, gas markets, or bridge operations.
Coverage basis: Absence of any such analysis.
Implementation score: 0 · Evidence confidence: High
Issue classification: quantum-critical vulnerability · Score treatment: score-reducing
Assurance: Per QRI Section 8.2: lack of a formal performance benchmark does not by itself create a Readiness & Risk Cap unless resource constraints prevent safe use of the PQ/hybrid path. Since no PQ path exists, this is score-reducing rather than cap-creating.
Shibarium has processed over 1.5 billion transactions since launch. PQC signatures (e.g., Dilithium at ~2.5KB per signature vs ECDSA at ~64 bytes) would significantly impact block space, validation time, and bridge checkpoint sizes. This analysis gap is a practical concern for any future migration.
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