Question

question 8 of 10
since blockchain technology is public, how are the identities of users protected?
user identities are not protected since people use blockchain voluntarily.
user identities are anonymous and protected by keys.
hashes protect all user identities.
each user is is assigned a unique block which is why it is called blockchain.

Explanation:

Blockchain technology uses cryptographic keys. Users have public - private key pairs. The public key is used for transactions (like receiving cryptocurrency), and the private key is kept secret. This setup makes user identities anonymous as transactions are linked to public keys (not real - world identities). Hashing is part of blockchain (for block integrity), but it's the key - based anonymity that protects user identities. The first option is wrong as there are protection mechanisms. The fourth option has a wrong understanding of blockchain naming (it's named for the chain of blocks, not user - block assignment).

Answer:

User identities are anonymous and protected by keys.