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SLH-DSA SHA2: 1.32–1.43× sign/verify speedup - #708
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October 12, 2026 03:03
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Signed-off-by: Leon Acosta <[email protected]>
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Save the padded SLH-DSA public-seed SHA-2 state once per operation and restore it for subsequent F/H/T hashes. Clear saved state and scratch when the operation ends.
M1 Pro measurements including setup show 1.32–1.37× signing and 1.32–1.42× verification for SHA2 sets; the unchanged SHAKE control stays near parity.
Tests and measurements · Ten fresh keys