tt-crypto-primitives

Blockchain crypto primitives optimized for RISC-V, targeting Tenstorrent hardware acceleration.

Status: Phase 1 scaffold — software implementations with benchmark harness. RISC-V Zkn acceleration in progress.

Primitives

Primitive	Use in Blockchain	RISC-V Acceleration	Status
Keccak-256	Ethereum's hash (addresses, txns, Merkle)	Zbb (bit manipulation)	Implemented
SHA-256	Bitcoin, Merkle trees, integrity	Zknh (hardware SHA)	Implemented
ECDSA secp256k1	Ethereum transaction signing	Zbb + software	Planned
NTT/iNTT	ZK proof generation	Vector + Tensix offload	Implemented
Polynomial multiply	FHE bootstrapping	Tensix matrix engine	Implemented

NTT Polynomial Multiplication

The ntt module implements a 256-point Number Theoretic Transform over q = 3329 using Kyber's primitive root 17.

use tt_crypto_primitives::{multiply_polynomials, Polynomial};

let lhs: Polynomial = [1; 256];
let rhs: Polynomial = [2; 256];
let product = multiply_polynomials(&lhs, &rhs);

The helper multiplies polynomials in the cyclic ring Zq[x] / (x^256 - 1). It includes:

• forward_ntt and inverse_ntt for coefficient/evaluation conversion
• multiply_polynomials for NTT-based multiplication
• multiply_polynomials_naive as an O(n^2) reference implementation
• tests for Kyber reference root properties and zeta generation, inverse round trips, sparse basis multiplication, and NTT-vs-naive multiplication

Feature Flags

[dependencies]
tt-crypto-primitives = { version = "0.1", features = ["riscv-zkn"] }

Feature	What
std (default)	Standard library support
riscv-zkn	Use RISC-V Zkn scalar crypto instructions
riscv-zvk	Use RISC-V Zvk* vector crypto instructions
tenstorrent	Offload to TT-Metalium kernels (Phase 2+)

Benchmarks

cargo bench

Benchmarks use Criterion and test hash inputs across 32B to 4KB, plus NTT polynomial multiplication against the naive O(n^2) baseline.

Validation

cargo test
cargo test --no-default-features
cargo bench

Cross-compilation for RISC-V

# Install RISC-V target
rustup target add riscv64gc-unknown-linux-gnu

# Build for RISC-V
cargo build --target riscv64gc-unknown-linux-gnu

# Run on Whisper ISS
whisper --isa rv64gcv_zkn target/riscv64gc-unknown-linux-gnu/debug/tt-crypto-primitives

Related

• kcolbchain/riscv-ocelot — Ocelot fork with crypto benchmarks
• kcolbchain/fhe — FHE library (RISC-V acceleration roadmap)
• tenstorrent/whisper — RISC-V ISS
• tenstorrent/tt-metal — TT-Metalium kernel programming

License

Apache-2.0