BlindBackupEncryptionProfileV1�QBlindBackupEncryptionProfileV1�+BlindBackupEncryptionProfileV1 {
version: u8 = 1
algorithmId: u16 = 1 // XCHACHA20_POLY1305_IETF
keyDerivationId: u16 = 1 // HKDF_SHA256
recoveryKeyId: 32 random nonzero bytes
keyEpoch: u32 // nonzero; rotation forces full re-encryption
}