Signatures
FN-DSA-1024 (Falcon)
The default for every account. At 1,280 bytes, it is the smallest NIST post-quantum signature at this security level.
Programmable money for a post-quantum world
- Decentralized, open-source blockchain
- Build EVM smart contracts in Solidity or Vyper
- Post-quantum cryptography throughout
- Run censorship-resistant programs with no central party
Why use post-quantum secure money?
More than 6 million bitcoin, worth hundreds of billions of dollars, are at risk because their public keys are exposed. A large enough quantum computer could in theory work out the private keys and move the coins. Ethereum has the same risk. NIST plans to phase out today’s elliptic-curve signatures, the kind Bitcoin and Ethereum use, by 2035. Ottereus uses post-quantum cryptography from day one to counter this future threat.
We encourage system administrators to start integrating them into their systems immediately, because full integration will take time.
Sources: NIST: first post-quantum standards (Aug 2024) · NIST IR 8547, draft transition plan (Nov 2024) · Glassnode: Bitcoin’s quantum-exposed supply (May 2026) · ethereum.org: post-quantum cryptography
How is Ottereus secured?
Ottereus uses post-quantum cryptography for signatures, node connections and hashing. Both signature schemes run at NIST security level 5, the highest.
Backup signatures
ML-DSA-87 (Dilithium)
If FN-DSA ever shows a weakness, holders move their coins to ML-DSA keys with a normal transaction. No fork needed.
Node connections
ML-KEM-1024 + X25519
Every connection between nodes is encrypted. Traffic recorded today can’t be decrypted later with a quantum computer.
Hashing
SHA3-256 / SHA3-384
Blocks, transactions, addresses and the state tree all use SHA3.
What’s in Ottereus?
Payments, smart contracts and mining, all on post-quantum keys.
Payments
- Account model with otte1… addresses
- Pay many people in one transaction, with a memo for each
- Multisig up to 7 keys, and atomic swaps with Bitcoin and Litecoin
Smart contracts
- EVM-compatible, so most Solidity contracts run unchanged
- Works with Foundry, Hardhat and the Ethereum RPC
- Every account also gets a 0x… address
Mining
- Scrypt, merge-mined with Litecoin (alongside Dogecoin) or solo
- Stratum bridge for mining pools
- 15-second blocks, difficulty adjusts every block
Performance and fees
- About 100 transactions per second
- Ethereum-style base fee plus tip
- Nodes read block data from disk in parallel, ahead of time
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How is Ottereus mined?
Ottereus is merge-mined with Litecoin. Because both networks use the Scrypt algorithm, you can mine Ottereus at the same time as Litecoin and Dogecoin, using the same hardware and without spending any extra electricity.
Every miner who joins helps keep the network secure. Merge mining works through AuxPoW, and if you prefer, you can also mine Ottereus on its own. The difficulty adjusts with every block, which keeps new blocks coming at a steady pace as miners come and go.
Quantum computers are not expected to give miners much of an advantage. The real quantum threat is to signatures, and major cryptocurrencies like Bitcoin, Litecoin, Dogecoin and Ethereum still rely on ones that are vulnerable. Ottereus has used post-quantum signatures from day one.
Getting started
Guides and documents for using Ottereus and building on it.
Guides and library
User guides show how to set up a wallet, send OTTE and start mining. Developer guides cover running a node, the RPC and deploying Solidity contracts. The library has the white paper, specifications and other documents.
Ottepedia
An A to Z of the terms used in Ottereus.
Read OttepediaJoin the community
Contribute
Ottereus is more than money. It is a decentralized community, kept going by volunteers who give their time to the project. Join us.
ContributingLatest news
Releases, network updates and project news.
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