Bitcoin quiz question 1

Compliance representatives are increasingly engaging with cryptocurrencies, with involvement ranging from boundless enthusiasm to warnings to use the utmost caution. As the mother of all cryptocurrencies, bitcoin has demonstrated that completely different mechanisms are at play here than those involved in conventional currencies. How well do you know bitcoin and blockchain? Why not have a go at our first bitcoin quiz question?

Alice and Bob live in Wonderland, where people pay taxes by transferring bitcoin to Cecile (the tax officer). Alice has bought goods from Bob and paid for them using bitcoin. Assuming that everyone always uses the same bitcoin address (the hash value of their public key), can Alice find out how much tax Bob has paid? They are using the standard Pay-to-Public-Key-Hash protocol.

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Data Protection Act

The Swiss Data Protection Act underwent a complete revision in 2020, and its new version took effect on September 1, 2023, along with the new Data Protection Ordinance (DPO). The revision itself is complete, but its practical application continues to evolve. The topic of AI is particularly relevant: On May 8, 2025, the FDPIC confirmed that the DPA is technology-neutral and applies directly to all AI applications. In practice, this means, among other things, that users must know whether they are interacting with AI (transparency requirement, Art. 19), and that a data protection impact assessment is mandatory in cases of high risk—such as profiling or facial recognition (Art. 22). The Federal Office of Justice (FOJ) is drafting a consultation document on AI regulation to be completed by the end of 2026. With this, Switzerland will implement the Council of Europe's AI Convention.

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Bitcoin quiz question 1

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Data Protection Act