In-depth essays · #44 / 50 · L2 Rollups, Federations & Interoperability
SNARKs vs. STARKs: How the Two Giants of Zero-Knowledge Cryptography Differ—and Why They Are Merging
Comparing proof size, trusted setups, prover speed, and post-quantum security across Ethereum’s ZK rollups
Read the technical sheets for Ethereum City’s northern ZK districts and you will encounter two acronyms separated by a single letter: SNARKs and STARKs. Here is why both proof families were invented and how modern rollups combine them.
1. ZK-SNARKs: Tiny Proofs and Cheap L1 Verification
SNARKs (Succinct Non-Interactive Arguments of Knowledge) produce remarkably small proofs—often just a few hundred bytes—that are very cheap for an Ethereum L1 smart contract to verify.
Historically, however, classic SNARKs required a trusted setup ceremony to generate public parameters and relied on elliptic-curve assumptions that would eventually be vulnerable to large-scale quantum computers.
2. ZK-STARKs: Transparent Setups, Fast Proving, and Post-Quantum Security
Pioneered by StarkWare for Starknet, the ‘T’ in STARK stands for Transparent: STARKs require no trusted setup at all and rely purely on collision-resistant hash functions, making them faster to generate at scale and resistant to quantum attacks—at the cost of larger proof byte sizes.
3. The Modern Synthesis: Prove with STARKs, Wrap in a SNARK for L1
Today’s leading ZK stacks—including ZKsync’s Boojum, Polygon’s Plonky, and Succinct’s SP1—combine the best of both worlds: they use fast, scalable STARK provers recursively off-chain and wrap the final aggregate proof inside a tiny SNARK right before submitting it to Ethereum L1.
4. Watching Validity Proofs Settle in Ethereum City
Every golden settlement beam firing from the northern ZK quarter into downtown Ethereum represents one of these succinct cryptographic proofs verifying thousands of off-chain transactions in a single L1 call.
Related districts in the city
Related glossary terms
This essay is an explainer written to help you read the city; it is not investment advice. Facts on this page are as of 2026-10 and may change. If you spot a mistake, please tell us through the contact page.