Quantum Computing vs Encryption

November 30, 2022

Quantum Computing vs Encryption

Welcome back to our blog, where we compare and contrast the latest technologies in the world of computers. Today, we will be looking at Quantum Computing and its effect on encryption.

What is Quantum Computing?

Quantum computing is the study of quantum-mechanical phenomena and their application in computer technology. A quantum computer uses qubits, which can represent both 0 and 1 at the same time, to perform complex calculations at a much faster rate than traditional computers. Due to this massive increase in computing power, many experts believe that quantum computing can pose a threat to traditional encryption methods.

What is Encryption?

Encryption is a process of encoding information, so that it can only be accessed by authorized personnel. Encryption can be achieved using various methods, such as symmetric-key encryption, public-key encryption and hash functions. It plays a critical role in information security and safeguarding sensitive data.

Quantum Computing vs Encryption

Now let's dive into the comparison of Quantum Computing and Encryption. Quantum computing's potential of breaking encryption makes it a significant threat to traditional encryption methods. Even commonly used RSA encryption method and AES algorithm, that are considered to be the most secure with today's computers, can be broken by quantum computers.

The RSA encryption algorithm is based on the factoring of two prime numbers, which is a computationally intensive problem. With current classical computers, it would take thousands of years to factor large numbers, making the RSA encryption secure. However, with quantum computers, this problem can be solved much faster, making RSA encryption vulnerable to quantum attacks.

The AES encryption algorithm is a symmetric-key cryptography algorithm that is designed to be very secure. The AES algorithm processes data in 128-bit blocks, and with the current classical computers, it would take many years to break the encryption. However, Quantum computers can easily break AES encryption by using Grover's algorithm.


In conclusion, Quantum computing poses a significant threat to traditional encryption methods, and it can easily break even the most secure encryption methods such as RSA and AES. We are in dire need of new encryption techniques that can stand against quantum computers. It is an exciting time for computer scientists as they strive to develop quantum-safe encryption methods.

Thank you for reading our blog post. We hope that we have provided you with some useful insight into the world of quantum computing and encryption.


  1. "What is Quantum Computing? A Super-Quick Explanation for Everyone". Newsweek. 2019-12-06. https://www.newsweek.com/what-quantum-computing-super-quick-explanation-everyone-1476142
  2. "Quantum Computing vs. Traditional Computing: What's the Difference?" Forbes. 2021-01-20. https://www.forbes.com/sites/forbestechcouncil/2021/01/20/quantum-computing-vs-traditional-computing-whats-the-difference/?sh=3831c99b6412
  3. "Why Quantum Computers Threaten Your Data's Security". PCMag. 2018-08-23. https://www.pcmag.com/news/364303/why-quantum-computers-threaten-your-datas-security

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