Evercrypted VS Diffee

• Formally Verified Cryptography
  Evercrypted (part of Project Everest) provides cryptographic implementations that are formally verified for correctness, memory safety, and side-channel resistance, offering a much higher assurance level than traditional hand-written crypto libraries.
• High Performance
  Despite being formally verified, Evercrypted's implementations are designed to deliver performance competitive with hand-optimized C and assembly code, meaning users don't have to sacrifice speed for security guarantees.
• Open Source
  Evercrypted is an open-source project, allowing full transparency and community review of the code, proofs, and verification methodology, which builds trust and enables collaborative improvement.
• Integration with Widely Used Protocols
  Evercrypted has been integrated into real-world projects such as Mozilla's NSS library and the Linux kernel's WireGuard implementation, demonstrating its practical applicability and industry trust.
• Eliminates Entire Classes of Vulnerabilities
  By using formal verification through the F* programming language and related tools, Evercrypted mathematically proves the absence of common vulnerabilities like buffer overflows, integer overflows, and certain timing side-channel attacks.

Possible disadvantages

• Steep Learning Curve
  The formal verification toolchain (F*, Low*, Vale, etc.) used in Evercrypted requires specialized knowledge in formal methods and proof assistants, making it difficult for average developers to contribute to or modify the codebase.
• Limited Algorithm Coverage
  Evercrypted does not cover every cryptographic algorithm or primitive. Its scope is limited to specific verified implementations, meaning developers may still need to rely on unverified libraries for less common algorithms.
• Complex Build and Integration Process
  Integrating Evercrypted into existing projects can be complex, as it involves a specialized toolchain and compilation pipeline that may not seamlessly fit into standard development workflows.
• Niche Community and Documentation
  Compared to widely-used libraries like OpenSSL or libsodium, Evercrypted has a smaller community and less extensive user-facing documentation, which can make troubleshooting and adoption more challenging.
• Verification Scope Limitations
  While the cryptographic code itself is formally verified, the verification does not extend to all surrounding infrastructure such as the compiler, operating system, or hardware, meaning there are still potential trust boundaries outside the verified code.

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