SFT-7342: backup-shard: redact the shamir share in Debug output - #78
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KeyOS logs whole shards at debug level while servicing a keycard, so the derived Debug put enough share material in the log to rebuild the master seed. Only the two leaf structs need the manual impl; Shard and ShardVersion compose from them. Found by the KeyOS security audit (SFT-7342). Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
badicsalex
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nicoburniske
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Aug 14, 2026
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KeyOS logs whole shards at debug level while servicing a keycard, so the derived Debug put enough share material in the log to rebuild the master seed. Only the two leaf structs need the manual impl; Shard and ShardVersion compose from them.