Double-spend bugs and key-derivation footguns, plus the full audit of Privacy Cash's Circom, Solana, and SDK stack.

Umbra Privacy V2 pitches Solana private transfers with shared pools, faster swaps, and user exits, less bolt-on, more product.

Hands-on guide to Solana ZK compression, covering rent, Merkle state compression, proofs, and compressed account lifecycle.

Privacy on Solana starts with selective disclosure, since banks apparently still hate publishing payroll to the public chain.