sub-MTU XMSS formal proof of classical security in ROM - #10
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TomWambsgans wants to merge 285 commits into
Open
sub-MTU XMSS formal proof of classical security in ROM#10TomWambsgans wants to merge 285 commits into
TomWambsgans wants to merge 285 commits into
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The reviewer-facing surface is now XmssSecurity.lean (the theorem and its axiom guards), XmssSecurity/Statement.lean (the game and the claim), and the definition-only XmssSecurity/Statement/ directory; all 280 proof modules move under XmssSecurity/Proof/ and never need to be read, only checked by Lean. Prune the dead first-lane cluster in CappedJointExactLoss and the dead signing-traced layer in CappedExactFirstLaneSourceTrace. Pin the axiom footprint with #guard_msgs in the root module. Update the spec footnote to the machine-checked 127-bit claim. Full lake build green (3023 jobs). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The reviewer surface shrinks from 836 lines in 16 files to 714 lines in 4: Statement/Spec.lean (the oracle-free specification), Statement/Algorithms.lean (keygen, sign, verify), Statement.lean (the experiment and the claim), and the root. The statement now owns the generic game under its plain names (Scheme, Adversary, gameCore, forgeAdvantage, HasClassicalSecurityBits) and instantiates it at Concrete.scheme, so Proof/SecurityGame.lean, the parallel Xmss* vocabulary, and the root's rfl bridge all disappear; the root theorem discharges the claim in one line. Restatement lemmas move behind the trust boundary into Proof/StatementLemmas.lean, hashDomainTag moves to its one consumer, and the unused samplePublicParameter_eq is deleted. Full lake build green (3011 jobs) with the axiom guards passing. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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127 bits of classical security in the ROM