Weak Diffie-Hellman and the Logjam Attack

Business Profile

Core Value Proposition

Weak Diffie-Hellman and the Logjam Attack provides analysis of weaknesses in Diffie-Hellman key exchange and practical guidance to mitigate TLS vulnerabilities, including deployment steps and demonstrations.

Target Customer

System administrators, network security professionals, TLS/SSL developers, and researchers working on secure communications and TLS deployments.

Key Differentiator

Public, peer-reviewed, multi-institution research on the Logjam vulnerability with deployment guidance, demonstrative proofs-of-concept, and an accompanying deployment guide; authored by a large collaboration and recognized with a Best Paper Award at CCS'15.

Implementation Timeline

Not specified in content

Pain Points

1Downgrade of secure TLS connections to 512-bit export-grade cryptography via DHE_EXPORT ciphers
2Widespread vulnerability due to common 1024-bit Diffie-Hellman primes used in TLS
3Potential for attackers to read/modify data after downgrading connections and to passively eavesdrop on a large fraction of TLS-enabled services

Key Features

1Full technical paper detailing the Logjam attack and its implications
2Guide to Deploying Diffie-Hellman for TLS with step-by-step instructions
3Proof-of-concept demos demonstrating the vulnerabilities and mitigations
4Internet-wide measurements and vulnerability assessments
5Contactable research team for guidance and collaboration

Target Customer Industries

Decision Makers

1System Administrator
2Developer

Client Results

1Guidance to disable export cipher suites and adopt 2048-bit (or larger) Diffie-Hellman groups
2Recommendations for upgrading TLS implementations and cryptographic libraries
3Awareness of vulnerabilities and steps to reduce risk across TLS-dependent services

Competitive Advantages

1Authoritative, peer-reviewed analysis with public disclosure
2Practical deployment guidance and remediation steps
3Demos and proof-of-concept materials to illustrate impact
4Multi-institution collaboration providing broad expertise

Key Benefits

1Identifies and explains Diffie-Hellman deployment weaknesses (Logjam)

2Provides actionable deployment guidance (Guide to Deploying Diffie-Hellman for TLS)

3Offers demonstrations and technical papers to inform practitioners and policymakers

Additional Product Information

Product Description

A research initiative that analyzes weaknesses in Diffie-Hellman key exchange as deployed in TLS and provides deployment guidance, demonstrations, and a technical paper to help practitioners mitigate related risks.

Target Market

TLS-enabled infrastructure and services including websites, mail servers, VPNs, and other TLS-dependent communications

Unique Value Proposition

Public, collaborative, peer-reviewed research that not only identifies the Logjam vulnerability but also provides actionable deployment guidance and demonstrable proof-of-concept demonstrations to reduce risk across TLS deployments

Technical Requirements

Disable DHE_EXPORT cipher suites; use 2048-bit or larger Diffie-Hellman primes; upgrade server/client TLS implementations (e.g., OpenSSH); ensure TLS libraries are up-to-date; require DH primes of at least 1024 bits

Pricing Model

Not specified

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