{
  "description": "Adversarial: the real, validly-issued 'summarizer' child token is presented with a RE-ISSUED copy of the very root it was delegated under \u2014 identical iss, sub, scopes, ceilings, ttl, iat, exp, del_depth and del_max_depth, honestly re-signed over its new bytes, differing only in 'jti' (a refresh of the parent INSTANCE, not of its authority model). The child's par_hash still commits to the ORIGINAL root's signing input, so step 2 (the byte-commitment) rejects with par_hash_mismatch. The parent's authority did not move, so subsumption cannot catch this splice \u2014 proving that child-to-parent-INSTANCE binding is carried by step 2 alone and is not implied by attenuation. Complementary to reject_spliced_parent.json, where the substituted parent is a DIFFERENT, broader, attacker-chosen root. Steps 1, 3, 4 and 5 pass, so the rejection isolates step 2: the child under its actual parent is the first two tokens of the existing valid_chain vector, which already verifies, and what changes here is the parent instance alone.",
  "expect_reject_reason": "par_hash_mismatch",
  "now": 0,
  "signer": {
    "alg": "HS256",
    "kid": "interop-v1",
    "secret_hex": "617474656e752d67756172642d696e7465726f702d766563746f72732d76312d66697865642d736563726574"
  },
  "tokens": [
    "eyJhbGciOiJIUzI1NiIsImMxNG4iOiJKQ1MiLCJraWQiOiJpbnRlcm9wLXYxIiwidHlwIjoiYXQrand0In0.eyJhdWQiOm51bGwsImF1dGhvcml6YXRpb25fZGV0YWlscyI6W3siY29uc3RyYWludHMiOlt7ImtleSI6ImVncmVzcyIsInJhbmsiOiJhbnkifSx7ImtleSI6Im1heF9yb3dzIiwibWF4IjoxMDAwMDB9XSwic2NvcGVzIjpbImNybS4qIiwibWFpbC5zZW5kIl0sInR5cGUiOiJhZ2VudF9kZWxlZ2F0aW9uIn1dLCJkZWxfZGVwdGgiOjAsImRlbF9tYXhfZGVwdGgiOjcsImV4cCI6MzYwMCwiaWF0IjowLCJpc3MiOiJhdHRlbnUtZ3VhcmQiLCJqdGkiOiJjaGFpbjpuMC1yZWZyZXNoLTEiLCJzdWIiOiJvcmNoZXN0cmF0b3IifQ.LNnkWPnRAt3N0xF8txo_oLCrd4FzmeMeoW7tqI1kmIM",
    "eyJhbGciOiJIUzI1NiIsImMxNG4iOiJKQ1MiLCJraWQiOiJpbnRlcm9wLXYxIiwidHlwIjoiYXQrand0In0.eyJhdWQiOm51bGwsImF1dGhvcml6YXRpb25fZGV0YWlscyI6W3siY29uc3RyYWludHMiOlt7ImtleSI6ImVncmVzcyIsInJhbmsiOiJub25lIn0seyJrZXkiOiJtYXhfcm93cyIsIm1heCI6NTAwMH1dLCJzY29wZXMiOlsiY3JtLnJlYWQiXSwidHlwZSI6ImFnZW50X2RlbGVnYXRpb24ifV0sImRlbF9kZXB0aCI6MSwiZXhwIjo5MDAsImlhdCI6MCwiaXNzIjoiYXR0ZW51LWd1YXJkIiwianRpIjoiY2hhaW46bjEiLCJwYXJfaGFzaCI6ImF0ekRPR21HWGJyMUtxcEVUb1RIU2h2Sy11ZXZUQVlxU2xMcGlrbkpjaUUiLCJzdWIiOiJzdW1tYXJpemVyIn0.UZTZRMFBW7PrW2BXhJTMWDTq_852tiAQggL5Tz_sA-Q"
  ]
}