Security Auditor Research

Date: November 27, 2025 Purpose: Evaluate potential security auditors for SIP Protocol

Evaluation Criteria

Criterion	Weight	Description
Cryptography Expertise	High	Experience with ECC, commitments, ZK
DeFi/Privacy Focus	High	Prior work on privacy protocols
Reputation	Medium	Track record, notable findings
Timeline	Medium	Availability and turnaround
Cost	Medium	Budget alignment
Communication	Low	Responsiveness, collaboration style

Tier 1: Premium Auditors

Trail of Bits

Website: https://www.trailofbits.com

Expertise:

Audited @noble/* libraries (our core dependencies)
Strong cryptography team
Extensive blockchain experience

Notable Audits:

Zcash (privacy protocol)
Ethereum Foundation
Uniswap, Compound

Estimated Cost: $100,000-150,000 Timeline: 6-8 weeks (backlogged)

Fit for SIP: EXCELLENT

Already familiar with @noble/* internals
Deep cryptographic expertise
Premium reputation

Contact: https://www.trailofbits.com/contact

OpenZeppelin

Website: https://www.openzeppelin.com/security-audits

Expertise:

Industry standard for smart contract audits
Strong Solidity/EVM focus
Some cryptography experience

Notable Audits:

Compound, Aave, 1inch
Ethereum 2.0 components

Estimated Cost: $80,000-120,000 Timeline: 4-6 weeks

Fit for SIP: GOOD

Strong reputation
Less crypto-focused than Trail of Bits
Better for smart contract layer

Contact: security@openzeppelin.com

Consensys Diligence

Website: https://consensys.io/diligence

Expertise:

Ethereum ecosystem focus
Smart contract security
Some cryptographic audits

Notable Audits:

MetaMask, Gnosis Safe
Various DeFi protocols

Estimated Cost: $60,000-100,000 Timeline: 4-6 weeks

Fit for SIP: GOOD

Strong EVM expertise
Wallet integration experience relevant
Less ZK-specific

Contact: https://consensys.io/diligence/contact

Tier 2: Specialized Auditors

Zellic

Website: https://zellic.io

Expertise:

ZK circuit auditing
Cryptographic implementations
Noir/Aztec familiarity

Notable Audits:

Aztec Protocol
Various ZK projects

Estimated Cost: $50,000-80,000 Timeline: 3-5 weeks

Fit for SIP: EXCELLENT

ZK expertise aligns with future Noir circuits
Cryptography-focused
Competitive pricing

Contact: contact@zellic.io

Least Authority

Website: https://leastauthority.com

Expertise:

Privacy-focused audits
Cryptographic protocol review
Strong academic ties

Notable Audits:

Zcash (multiple audits)
Tor Project
Various privacy protocols

Estimated Cost: $40,000-70,000 Timeline: 4-6 weeks

Fit for SIP: EXCELLENT

Privacy protocol specialists
Zcash experience directly relevant
Strong cryptographic review

Contact: https://leastauthority.com/contact

NCC Group

Website: https://www.nccgroup.com/us/our-services/cyber-security/specialist-practices/cryptography-services/

Expertise:

Cryptographic protocol analysis
Enterprise security
Broad experience

Notable Audits:

Various enterprise blockchain
Cryptographic libraries

Estimated Cost: $60,000-100,000 Timeline: 4-6 weeks

Fit for SIP: GOOD

Strong crypto team
More enterprise-focused
Thorough methodology

Contact: https://www.nccgroup.com/contact-us/

Tier 3: Independent Cryptographers

JP Aumasson

Background: Co-designer of BLAKE2, SipHash, Argon2 Expertise: Symmetric cryptography, hash functions, protocol analysis Availability: Limited, selective projects

Fit for SIP: MODERATE

Hash/symmetric focus (less ECC)
World-class reputation
May be interested in novel protocols

Contact: Via Twitter/academic channels

Filippo Valsorda

Background: Former Google/Cloudflare, Go crypto team Expertise: TLS, cryptographic implementations Availability: Selective consulting

Fit for SIP: GOOD

Implementation security expertise
Go/TypeScript experience
Strong communication

Contact: https://filippo.io

Academic Partnerships

Option: Partner with university crypto labs

Potential Partners:

Stanford Applied Cryptography Group
MIT Digital Currency Initiative
UC Berkeley RDI

Advantages:

Deep theoretical expertise
Lower cost
Publication opportunities

Disadvantages:

Slower timeline
Less industry-focused

Tier 4: Audit Competitions

Code4rena

Website: https://code4rena.com

Model: Competitive audit with multiple auditors Cost: $20,000-50,000 (prize pool) Timeline: 1-2 weeks contest + judging

Fit for SIP: MODERATE

Good coverage breadth
Variable quality
Better for smart contracts

Sherlock

Website: https://www.sherlock.xyz

Model: Curated auditor competition Cost: $30,000-60,000 Timeline: 2-3 weeks

Fit for SIP: MODERATE

Higher quality than open competitions
DeFi focus
Crypto expertise varies

Immunefi Bug Bounty

Website: https://immunefi.com

Model: Ongoing bug bounty program Cost: Pay per finding (define bounty table) Timeline: Continuous

Fit for SIP: GOOD (post-audit)

Complements formal audit
Ongoing security
Community engagement

Recommendations

Primary Recommendation: Phased Approach

Phase 1: Cryptographic Review (Now)

Auditor: Least Authority or Zellic
Scope: commitment.ts, stealth.ts, privacy.ts
Cost: $30,000-50,000
Timeline: 3-4 weeks
Rationale: Privacy protocol specialists, cost-effective

Phase 2: Full SDK Audit (With Noir Circuits)

Auditor: Trail of Bits or Zellic
Scope: Full SDK + Noir circuits
Cost: $70,000-100,000
Timeline: 5-6 weeks
Rationale: Complete coverage after circuits implemented

Phase 3: Bug Bounty (Post-Launch)

Platform: Immunefi
Cost: $10,000-50,000 reserve
Timeline: Ongoing
Rationale: Continuous security

Budget Summary

Phase	Cost Range	Priority
Phase 1	$30,000-50,000	High
Phase 2	$70,000-100,000	Medium
Phase 3	$10,000-50,000	Low
Total	$110,000-200,000

Alternative: Single Comprehensive Audit

If budget allows for single engagement:

Recommended: Trail of Bits

Cost: ~$120,000
Timeline: 6 weeks
Coverage: Complete SDK review

Next Steps

Immediate: Reach out to Least Authority and Zellic for quotes
Week 1: Compare proposals, evaluate timeline fit
Week 2: Select auditor, sign engagement
Week 3+: Begin audit process

Contact Templates

Initial Outreach Email

Subject: Security Audit Request - SIP Protocol (Privacy Layer)

Hi [Auditor Team],

We're seeking a security audit for SIP Protocol, a privacy layer for
cross-chain transactions built on NEAR Intents.

Key Details:
- ~5,000 lines TypeScript (SDK)
- Core crypto: Pedersen commitments, stealth addresses (EIP-5564)
- Dependencies: @noble/* (audited by Trail of Bits)
- Full documentation: threat model, crypto assumptions

Timeline: Flexible, prefer Q1 2026
Budget: [Range]

Would you be available for a scoping call?

Repository: https://github.com/sip-protocol/sip-protocol
Audit docs: docs/security/

Best regards,
[Name]
SIP Protocol Team

Appendix: Auditor Comparison Matrix

Auditor	Crypto	Privacy	ZK	Cost	Timeline	Fit
Trail of Bits	A+	A	A	$$$	6-8w	Excellent
Least Authority	A	A+	B	$$	4-6w	Excellent
Zellic	A	B+	A+	$$	3-5w	Excellent
OpenZeppelin	B	B	B	$$$	4-6w	Good
Consensys	B	B	B	$$	4-6w	Good
NCC Group	A	B	B	$$	4-6w	Good
Code4rena	B	C	C	$	2-3w	Moderate

Legend: A+ = Exceptional, A = Strong, B = Adequate, C = Limited Cost: $ = <$40k, $$ = $40-80k, $$$ = >$80k