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Anyone can verify that you’ve placed that information because the container has your signature on it, but only you (or a program) can unlock what’s inside the container because only you hold the private keys to that data, securely.
So, the blockchain behaves almost like a database, except that part of the information stored — its “header” — is public.
Developers need to learn how to write decentralized apps that are enabled by blockchain technology.
And end-users need to learn how to create or use smart contracts, for example as depicted via the Mist browser vision (Ethereum), which is a mix of marketplace discovery, management dashboard, and creation platform, all-in-one.
To that end, business leaders and visionaries will need to learn a new vocabulary around crypto-related frameworks.It’s based on the public/private hegemony, which is the yin-yang of the blockchain: public visibility, but private inspection. You can publish your home address publicly, but that doesn’t give any information about what your home looks like on the inside.You’ll need your private key to enter your private home, and since you have claimed that address as yours, no one else can claim the same address as theirs.The “proof of work” is a “right” to participate in the blockchain system.It is manifested as a “big enough hurdle” that prevents users from changing records on the blockchain without re-doing the proof of work.