Native Attestation
- Entity ID:
ent-20260409-eaad8d36f26d - Type:
service - Scope:
shared - Status:
active - Aliases: native attestation, cch hash, binary attestation
Description
DRM-like mechanism where cch=00000 placeholder in HTTP requests is overwritten by Bun's Zig HTTP stack with a computed hash validating the request came from the official binary. Anthropic acquired Bun partly to own this Zig-native capability.
Key claims
- Bun acquired partly to own native attestation in Zig
- Bun HMAC signing is a silent binary-attestation moat
- cch=00000 Bun sentinel scans the entire HTTP request body
- Bun fork mutates request body between JSON serialize and TLS encrypt, breaking prompt cache
- Bun native HTTP stack overwrites a 5-byte JS placeholder with an HMAC hash
Relations
- Anti-Distillation Defenses --[contains]--> Native Attestation
- Bun-Level Zig HMAC Request Signing --[related_to]--> Native Attestation