The base of Cryptocurrency

Cryptography (not cryptology, which contains cryptography and cryptanalysis) is an encryption study based on mathematical theory. It is also used for private communication, which allows the world to see the encrypted message in the event that someone listens to it, and does not tell them the real name. Only the intended recipient can read it. Like you said, you can re-register "things" using the same program, but when "pre-decrypt" (my name) is an object, other people linking your cryptographic key may indicate that you have signed something.

Therefore, cryptography is used almost exclusively in secure environments. You can limit only those authorized to access private data. This helps to send messages, ensuring that only paid customers can install software and be responsible (at least try to prevent people from "playing" with their phone.

It can also provide some security in other ways. Some "dark networks," especially Freenet, do not check the details. Each user stores data on their computer, so their deletion will not delete data from the network. After downloading a report, it may be almost impossible to delete it. In the case of illegal content, you can put it on a computer without any knowledge. However, as it is encrypted, the judge should not be held liable for storing computer data because it is not only possible to prove that your computer is holding illegal content, but even if it is possible, it can do so. Do not access it unless you have tried to remove encryption by other illegal means.

With Bitcoin, you can also find cryptographic apps in:

bit message

Tahoe-LAFS (and other encrypted file storage systems)

PGP / GPG (transparent encryption so you can send emails to people other than other people reading the message)

Finally, I would say that different passwords can be a growing trend. I have a chainchain, to connect to the system, whenever I need a new password. Only 64,000 random passwords will be verified as "I am," so the attacker will not be able to access the passwords, but will not be able to steal the password he or she is using and use. Once installed, it will no longer be used.

Use of Cryptography

The crux point of what you have learned so far is that cryptography is the art of storing and writing information in such a way that it only reveals itself to those who need to see it. Hide from everyone. Prior to the age of knowledge, cryptography was only used to ensure the confidentiality of information. Encryption has been used to ensure the confidentiality of the communications of spies, military leaders, and officials. Egyptian hieroglyphics, scythe passwords used by Spanish Spaniards, cement and various auxiliary devices used throughout history in modern times. These devices have undergone some changes with the advent of computers and electronic devices, contributing significantly to cryptanalysis