How does the average person solve the “$5 wrench problem” / prevent rubber-hose cryptanalysis? What is the easiest way to do a multi-signature or multi-factor set-up? Could timelocks and smart contract solutions be used for inheritance issues? The technology and educational resources around key management need to mature first. There needs to be a pragmatic balance between legal and technical plans, with human-based processes and controls. Take an entrepreneurial perspective and you will help overcome the barriers to adoption!

You can find out more about Third Key Solutions here:

The XKCD comic I referenced:

These questions are from the September and October Patreon Q&A sessions, the HoshoCon event, and the Seattle ‘Internet of Money’ tour event, which took place on September 29th, October 27th, October 11th, and November 10th 2018 respectively.

If you want early-access to talks and a chance to participate in the monthly live Q&As with Andreas, become a patron:

Security vs. Complexity –
Advanced Bitcoin Scripting, Part 1: Transactions and Multisig –
Advanced Bitcoin Scripting, Part 2: SegWit, Consensus, and Trustware –
What is a private key? –
Public keys vs. addresses –
How do I choose a wallet? –
Secure, tiered storage system –
Hardware wallets and attack surface –
2FA and secure hardware –
Setting up secure storage devices –
What is a private key? –
How do mneomonic seeds work? –
Using paper wallets –
Wallet design and mass adoption –
Cryptographic primitives –
Public keys vs. addresses –
Re-using addresses –
Coin selection and privacy –
Multi-signature and distributed storage –
Nonces, mining, and quantum computing –
Software distribution security –
Protocol development security –
Geopolitics and state-sponsored attacks –
How to get people to care about security –
Careers in open blockchain development –
Honest nodes and consensus –
Why running a node is important –
Full node and home network security –
Running nodes and payment channels –
What is Segregated Witness (SegWit)? –
SegWit and fork research –

Andreas M. Antonopoulos is a technologist and serial entrepreneur who has become one of the most well-known and respected figures in bitcoin.

Follow on Twitter: @aantonop

He is the author of two books: “Mastering Bitcoin,” published by O’Reilly Media and considered the best technical guide to bitcoin; “The Internet of Money,” a book about why bitcoin matters.

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Translations of MASTERING BITCOIN:



Translations of THE INTERNET OF MONEY:
Spanish, ‘Internet del Dinero’ (v1) –
French, ‘L’internet de l’argent’ (v1) –
Russian, ‘Интернет денег’ (v1) –
Vietnamese, ‘Internet Của Tiền Tệ’ (v1) –


Music: “Unbounded” by Orfan (
Outro Graphics: Phneep (
Outro Art: Rock Barcellos (