Skip to content

Just a moment

Loading your page…

Blockchain technology · Academy · FNZ

Financial Network ZurichFNZZürich

Explore our communities

Financial Network ZurichCurrentFinance · investing · trading · pro Zürich Spontaneous MeetupSocial · spontaneous · excursions & parties

Events Community Members Academy Companies Gallery Contact

Events Community Members Academy Companies Gallery Contact

← All courses

Crypto · Intermediate

Blockchain technology

How the machinery works, from hashes to rollups — the engineering, not the price.

2 lessons are available to preview. A free account unlocks every lesson and saves your progress. No course fee.

Start course →

18 lessons · ~204 min

Cryptographic hashing and what it guarantees

9 min readFree preview

Public key cryptography and digital signatures

10 min readFree preview

The double spend problem and why it was hard

10 min readFree account

Blocks, chains and the append-only ledger

10 min readFree account

Proof of work: mining, difficulty and energy

12 min readFree account

Proof of stake: validators, slashing and the security model

14 min readFree account

Consensus, finality and chain reorganisations

13 min readFree account

Nodes, clients and what decentralisation actually requires

13 min readFree account

The UTXO and account models compared

13 min readFree account

Smart contracts and the Ethereum virtual machine

10 min readFree account

Gas, fees and blockspace as a market

10 min readFree account

The scalability trilemma

10 min readFree account

Layer 2: rollups, optimistic and zero-knowledge

11 min readFree account

Bridges and why they are the weakest link

11 min readFree account

Oracles and the problem of off-chain truth

13 min readFree account

Wallets, key management and self-custody in practice

13 min readFree account

Privacy: mixers, zero-knowledge proofs and regulatory reality

12 min readFree account

Reading a blockchain explorer and verifying claims yourself

10 min readFree account

← All courses

Financial Network Zurich

A community platform for Zürich — FNZ for finance, ZSM for the spontaneous. Signal over noise.

Platform

Events Academy Companies Gallery

Communities

Financial Network Zurich Zürich Spontaneous Meetup Get involved

Also on

Impressum — The Swiss Standard by Alessandro Scire Calabrisotto · c/o Alessandro Scire Calabrisotto, Seebahnstrasse 121, 8003 Zürich, Switzerland · a.scire.c@icloud.comPrivacy · Terms · Impressum · © 2026