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!? ReLaX edited this page Jun 18, 2026 · 10 revisions

MASC-256

MASC-256 (Memory Accumulator Stack Cipher 256-bit) is an experimental authenticated stream-cipher research project. Version 2 keeps the original 256-bit accumulator and memory-mixing design, then wraps it in a safer API that is harder to misuse.

Read More About it Here MASC‐256 Academic Reference.

Table of Contents

  1. Repository Mapping
  2. Parameter Summary
  3. Notation
  4. Threat Model
  5. Security Goals and Non-Goals
  6. Construction Overview
  7. Public Message Format
  8. Key Schedule and Domain Separation
  9. Accumulator State
  10. Primitive Operations
  11. State Absorption
  12. Accumulator Initialization
  13. Keystream Generation
  14. Encryption Core
  15. Authentication Core
  16. Public API
  17. Error Semantics
  18. Reference Test Vector
  19. Implementation Security Notes
  20. Validation and Analysis Program
  21. Known Limitations
  22. Public Positioning and Evaluation Scope
  23. References
  24. Release Conformance
  25. Appendix A: Complete Seal Algorithm
  26. Appendix B: Complete Open Algorithm
  27. Appendix C: Core Stream Algorithm

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