# Glossary

### sZERO

sZERO is a non-transferrable ERC20 and represents a balance of staked ZERO, which is read from ZERO network nodes to determine voting weight, should the sZERO holder decide to run a validator.

### Signers

Entities responsible for signing messages using the [FROST](#frost) protocol. 

### Validators

Entities responsible for producing blocks.

### Voters

Entities holding a balance of staked ZERO (sZERO) on Ethereum mainnet, the on-chain governance token.

### Keepers

Entities responsible for relaying transactions onto any supported network, receiving passive revenue based on transaction volume, in excess of fees paid.

### Schnorr Signature

A type of digital signature scheme that allows for the efficient and secure signing of transactions and messages.

### FROST

Flexible Round-Optimized Schnorr Threshold (FROST) is a somewhat natural conversion from secret sharing of private keys to secret sharing of signatures, that is, a protocol describing how to use key shards to construct signature shards which can be put together to construct full signatures without revealing the shared sharded key.

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