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Update DR params

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Jazz Turner-Baggs 2026-01-20 13:55:36 -08:00
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standards/application/privatev1.md
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@ -212,8 +212,8 @@ Payloads are encrypted using the [Double Ratchet](https://signal.org/docs/specif
**Double Ratchet Configuration**
- `DH`: X25519 for Diffie-Hellman operations
- `KDF_RK`: HKDF with SHA256, `info = "PrivateV1RootKey"`
- `KDF_CK`: HKDF with SHA256, using `input`=`0x01` for message keys and `input`=`0x02` for chain keys
- `KDF_RK`: HKDF with Blake2b, `info = "PrivateV1RootKey"`
- `KDF_CK`: Blake2b as KDF truncated to 32 bytes, 'key'= previous_ck 'salt'= `@[]`, using `personal`=`mk` for message keys and `personal`=`ck` for chain keys
- `KDF_MK`: HKDF with SHA256, `info = "PrivateV1MessageKey"`
- `ENCRYPT`: `AEAD_CHACHA20_POLY1305`