A simple guide to conditional tokens, the stickers that turn into money once a question is answered. Explained with a school fair prize shop, a locked money box, and a clever way of naming things.
2026, Jul 28 — 18 minute read
How the Zama Confidential Blockchain Protocol uses zero-knowledge proofs of knowledge on encrypted inputs, which proof system TFHE-rs relies on, where the proof is verified, and why the calldata inputProof holds signatures rather than the proof.
2026, Jul 24 — 18 minute read
How the ERC-4337 SenderCreator contract deploys smart accounts on behalf of the EntryPoint, how third parties read counterfactual addresses through getSenderAddress, and what changed across EntryPoint v0.6 to v0.9.
2026, Jul 23 — 15 minute read
How SIP (RFC 3261) sets up, modifies, and tears down multimedia sessions using a text request/response model, its elements, layered design, transactions, dialogs, and security.
2026, Jul 20 — 21 minute read
A technical walkthrough of the PCI PTS POI Modular Security Requirements v7.0, the standard that governs payment terminals, from tamper resistance and PIN protection to account-data encryption, wireless security, and third-party applications.
2026, Jul 20 — 26 minute read
A technical walkthrough of the PCI PTS HSM Modular Security Requirements v4.0, the standard that defines how payment Hardware Security Modules are evaluated, from tamper resistance and key separation to cloud multi-tenant isolation.
2026, Jul 20 — 26 minute read
A guided tour of RFC 6071, the roadmap that maps the sprawling IPsec and IKE RFC landscape - the seven document groups, IPsec-v2 vs v3, IKEv1 vs IKEv2, extensions, and crypto requirement levels.
2026, Jul 20 — 13 minute read
