FlowCoin v0.3.0 — Keccak-256d Proof-of-WorkThe first cryptocurrency using Keccak-256d (SHA-3) Proof-of-Work. Built from scratch — not a fork. 182,000 lines of original code.
Why Keccak-256d?Keccak is the SHA-3 standard — selected by NIST after a 5-year public competition among 51 candidates. It is the newest and most secure hash standard in existence.
No ASIC advantage — by the laws of physics.Keccak uses a 1600-bit internal state with 24 rounds of full permutation, doubled (256d = two passes). The bottleneck is memory bandwidth, not logic gates. An ASIC for Keccak would need the same wide, fast memory bus as a GPU — there is no shortcut. You cannot make memory faster by putting it on a custom chip.
Bitcoin today: 6 mining pools control 95% of hashrate. A regular person cannot participate.
FlowCoin: one GPU = one vote.
Technical Specifications- Algorithm: Keccak-256d (double Keccak-256, padding 0x01 — same variant as Ethereum)
- Signatures: Ed25519 (RFC 8032)
- Addresses: Bech32m, prefix fl1q...
- Max supply: 21,000,000 FLOW
- Block reward: 50 FLOW
- Halving: every 210,000 blocks
- Block time: 10 minutes (difficulty retarget every 2016 blocks)
- HD wallet: SLIP-0010 (new address per mined block)
- P2P: IPv4 + IPv6 dual-stack with node_id dedup
- RPC: Bitcoin Core-compatible with cookie authentication
- GPU mining: OpenCL (NVIDIA, AMD, Intel, Apple)
Download v0.3.0Node:GPU Miner:Quick Start# Start node
./flowcoind
# Start GPU miner (in another terminal)
./flowcoin-miner
# Check balance
./flowcoin-cli getbalance
# Send coins
./flowcoin-cli sendtoaddress fl1q... 10.0
211.205.13.203:9333
DNS: seed.flowcoin.org
"White House calls for federal AI law to preempt states
21/Mar/2026 - FlowCoin: decentralized proof-of-work"
NVIDIA RTX 5080 Laptop GPU: ~1 GH/s at difficulty 1
Links
FlowCoin — the newest NIST hash standard powering the only ASIC-proof cryptocurrency. Your GPU, your vote.
