One of the most serious problems that immediately arose with the spread of the internet is that of the verification and protection of users' identities. One of the most widespread memes stated that, on the internet, nobody knows you're a dog (https://en.wikipedia.org/wiki/On_the_Internet,_nobody_knows_you%27re_a_dog). Being able to verify the real identity of online users is also necessary to prevent identity theft. Blockchain technology has therefore been considered by many to be an effective tool in verifying and protecting users' identity. Taking advantage of the same cryptographic validation techniques used in the blockchain to achieve data integrity, it is believed that even personal identity can also be effectively protected from identity theft attacks.
In the following section, we will go deeper into issues related to identity...