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Cryptography is the race between advanced algorithms one create codes and the other break codes.



The image above is "the lattice cryptography relies on mathematical lattices — arrangements of dots in space". (Quantamagazine.com/ Cryptography’s Future Will Be Quantum-Safe. Here’s How It Will Work). The image could also introduce the model of cryptography where the system breaks information into pieces. And then it sends that data to the receiver by using different routes. 

The fact is this. Quantum cryptography seems invincible technology that turns cryptology into history. But then another fact is that also all other encryption methods seemed invincible when they were introduced to users. And sooner or later, there is found some kind of vulnerability. 

When cryptographical systems develop, developers use technology that is best in business at that time. And that thing causes mistakes. 

And that is a problem with the encryption process. Faster and more advanced computers can break the code. And there is a possibility that advanced systems can break even quantum cryptography. 

The idea is that if a qubit travels across two laser rays or quantum channels. The first laser steals information. And the second one will make the replacing qubit. So the system just reads information from the qubit. And then it will make the new qubit. 

The power of quantum cryptography is that the information is stored in a solid piece. That piece is the electron or photon. And that makes it almost impossible to read information from that qubit. The system detects if the qubit is lost or its energy level is changed. But there is the possibility that the attacking system can make a copy of the qubit.  

Systems are safe if they are done as they should.  If the qubits are not protected that can cause a situation where some kind of laser system can steal information and copy the qubit. So in that case the system cannot detect the missing qubit. But that is only theory. And the theory is a path to a practical solution. 

Even if algorithms cannot break codes or lasers cannot steal qubits there are always people working with systems. The attackers can use bribery, sodium pentothal, or some other method to make people give information. And that means there are always vulnerabilities. 


https://www.quantamagazine.org/cryptographys-future-will-be-quantum-safe-heres-how-it-will-work-20221109/


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