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@ -46,6 +46,16 @@ We're still falling short in a major area though.
Current smartphones are non-upgradeable by their owners and can't be built from scratch like a desktop computer can. They also contain lots of black-box proprietary code. Even a Google Pixel, the gold standard of Android smartphone freedom that allows you to install your own operating system securely, still suffers from the same pitfalls. Current smartphones are non-upgradeable by their owners and can't be built from scratch like a desktop computer can. They also contain lots of black-box proprietary code. Even a Google Pixel, the gold standard of Android smartphone freedom that allows you to install your own operating system securely, still suffers from the same pitfalls.
### Cryptography
How do we ensure the psuedonyms can't be linked together? We already use cryptography to protect our communications; here Chaum presents ways to protect unlinkability in a similar way using cryptography.
>Simple mathematical proofs show that, with appropriate use of the systems, even conspiracy of all organizations and tapping of all communication lines cannot yield enough information to link the pseudonyms-regardless of how clever the approach is or how much computation is expended.
## Types of Transactions
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## Problems ## Problems
Services that don't require an account or payment to use are great; you can use them with Tor, clear your browser history, whatever you need to do to keep your activity private. Services that don't require an account or payment to use are great; you can use them with Tor, clear your browser history, whatever you need to do to keep your activity private.