The era of quantum computing is closer than we imagine, and with it, unprecedented challenges to digital security emerge. Today, while traditional encryption protects our data, in the near future quantum computers promise to break these barriers with ease, exposing sensitive information to incalculable risks. 

In this scenario, post-quantum cryptography emerges as the indispensable answer for a future where security will not be an option, but a strategic necessity. Come and discover how this revolutionary technology can redefine digital protection and ensure your company is ahead in the race for quantum security.

What is post-quantum cryptography?

Post-quantum cryptography refers to the development of algorithms designed to protect data against attacks from quantum computers, which possess processing capabilities far superior to those of classical computers.  

Unlike traditional cryptography, such as RSA, which relies on complex mathematical problems, quantum computers can solve them quickly, making these methods vulnerable.

Also called "quantum-secure" cryptography, post-quantum cryptography (PQC) seeks to replace current hardware and software systems with more secure solutions capable of resisting quantum attacks. 

These new algorithms use mathematical equations, such as lattice-based cryptography or multivariate systems, which are extremely difficult to solve even for quantum computers.

How does digital cryptography work?

Digital cryptography is the process of transforming readable information (plaintext) into an encoded format (ciphertext), accessible only to those who possess the correct decryption key. This technique is widely used to ensure data security in communications, financial transactions, and the storage of sensitive information.

The algorithms that underpin current digital cryptography, such as RSA, are based on mathematical problems, such as prime factorization and discrete logarithm. These problems are considered intractable for classical computers, meaning they require an impractical amount of time to be solved with the computational capabilities available today.

However, this approach, which is fundamental to contemporary digital security, runs the risk of becoming obsolete with the advancement of quantum computers. The need for more advanced algorithms, such as those of post-quantum cryptography, becomes increasingly urgent to protect data in a future dominated by quantum machines.

Why are quantum computers a threat to cryptography?

Quantum computers represent a significant threat to traditional cryptography due to their ability to quickly solve complex mathematical problems that underpin the security of current cryptographic systems. 

While classical computers process information sequentially and face limitations regarding the time required to perform certain calculations, quantum computers use principles of quantum mechanics, such as superposition and entanglement, to perform multiple calculations simultaneously.

An example of this threat is Shor's algorithm, developed for quantum computers, which can factor large numbers extremely efficiently. This advancement compromises cryptographic systems like RSA, which relies on the difficulty of factoring large prime numbers to ensure security.

Furthermore, quantum algorithms are capable of solving the discrete logarithm problem, which is the basis of many public-key systems, such as Diffie-Hellman and elliptic-curve cryptography (ECC), widely used in internet security protocols like HTTPS.

The exponential speed of quantum computers further amplifies this threat. Problems that would take thousands of years to solve by classical computers can be solved in a matter of minutes or hours by sufficiently advanced quantum machines. 

This implies that current cryptographic systems, designed to withstand classical processing power, quickly become obsolete, compromising the confidentiality and authenticity of digital communications.

Will quantum computers breach cryptographic defenses soon?

The possibility that quantum computers could soon breach traditional cryptographic defenses has generated intense debates in the technology community. Chinese researchers claimed to have developed a method to break the RSA-2048 algorithm, widely used in blockchain networks and other security protocols.

Traditionally, breaking this algorithm would require factoring a 617-digit number, a task that would take about 300 trillion years for classical computers. However, researchers suggest that a quantum computer with 372 qubits could realistically perform this task.

To put this into context, IBM's latest quantum computer, the Osprey, has 433 qubits, indicating that the necessary theoretical capacity is already within our reach. However, experts like cryptographer Bruce Schneier point out that while the advances are promising, there are significant challenges in scaling these techniques to larger key sizes, such as those used in real-world systems.

Although the development of functional quantum computers still faces significant challenges, it is only a matter of time before these machines become capable of breaching classical encryption systems. Therefore, traditional cryptography could be completely compromised, accelerating the need to implement post-quantum solutions.

Impact of post-quantum cryptography on businesses

The imminent arrival of quantum computers places crucial sectors in front of an unprecedented challenge: ensuring the security of sensitive data in a scenario where traditional cryptography will become obsolete. Information and Communication Technology (ICT) companies, the banking and financial sector, and government and defense institutions are already at the forefront of this race.

The adoption of post-quantum cryptography is not just a precaution, it is an urgent necessity to protect communications, transactions, and strategic information against future attacks. 

Information and Communication Technology (ICT):  ICT companies rely heavily on secure networks to transmit sensitive data. Given this, the adoption of post-quantum cryptography is essential to ensure the integrity and confidentiality of information.

Banking and Finance:  The financial sector, which deals with high-risk transactions and confidential data, is at the forefront of the need to migrate to post-quantum solutions. New algorithms will protect accounts, transfers, and payment systems against intrusions that are impossible to detect with today's infrastructure.

Government and Defense: Governments and defense institutions must ensure that their communication systems are immune to any type of quantum attack. Implementing post-quantum solutions is a strategic priority to protect national and operational data.

The challenges in implementation. 

As organizations face the need to protect data against quantum threats, three fundamental pillars stand out: robust infrastructure investments, specialized team training, and the pursuit of interoperability between new and legacy systems. Each of these elements is essential to ensure a successful transition and avoid vulnerabilities in an increasingly challenging digital environment. 

Infrastructure Investments: Transitioning to post-quantum cryptography requires significant investment in infrastructure, including upgrading existing systems and developing compatible hardware.

Education and Training: It is essential to educate IT professionals on the new technologies and train teams to implement and manage post-quantum solutions effectively.

Interoperability: Ensuring that new algorithms work seamlessly with legacy systems and across different organizations is a critical challenge. Compatible solutions will help prevent business disruptions.

Take the first step toward quantum security with CodeBit  

When it comes to innovation, CodeBit is always prepared, always up to date with the latest developments in the technology world.

In partnership with Amazon Web Services - AWS, CodeBit helps organizations build and transform security, identity, and compliance into key business enablers. At CodeBit, security is our top priority. AWS is the most secure global cloud infrastructure for developing, migrating, and managing applications and workloads. This design is backed by the trust of our millions of customers, including the most security-sensitive organizations, such as government, healthcare, and financial services.

Get in touch and discover how we can transform your security into a true fortress against the future. Follow the CodeBlog and stay on top of all the technological news in the world.