> Aztec.nr API reference, v6.0.0 (mainnet and testnet). Index: https://docs.aztec.network/aztec-nr-api/v6.0.0/llms.txt

# Global DOM_SEP__INTERACTIVE_HANDSHAKE_SIGNATURE

Module: `noir_aztec::protocol::constants`

```rust
pub global DOM_SEP__INTERACTIVE_HANDSHAKE_SIGNATURE: u32;
```

Domain separator for the message a recipient signs to authorize an interactive handshake, hashed via [`crate::hash::poseidon2_hash_with_separator`](/aztec-nr-api/v6.0.0/protocol_types/hash/fn.poseidon2_hash_with_separator.md) and verified in-circuit by the handshake registry contract.