This post is a gentle introduction to shielded transactions, as used in private payment systems such as ZCash, Penumbra or on top of any Bitcoin-shaped (i.e. UTXO-based) protocol. At the end of this p...

Shielded blockchains like Penumbra provide privacy through the use of zero-knowledge proofs (ZKPs): actions that change the public chain state can be verified _without_ providing the underlying privat...

Penumbra is building a shielded, cross-chain network for private transactions, staking, swaps, and marketmaking. We use zero-knowledge proofs (ZKP) to provide privacy. One crucial component for effici...

This is a simple explanation of cryptographic commitment schemes, requiring minimal math or cryptography background.

In my last post I described how I implemented the signal-protocol Python library, which provides Python bindings using Pyo3 to an upstream maintained Rust cryptography crate implementing the Signal pr...