All existing cryptographic algorithms are susceptible to security degradation over time, primarily due to the continuous growth in computational power available to attackers. Once sufficiently powerful quantum computers become available, established asymmetric schemes like RSA, DSA, and ECDH will become vulnerable to compromise. Although the exact timing of this development remains uncertain, there is little doubt that it will inevitably occur. Consequently, a prompt and well-prepared migration toward quantum-secure schemes is imperative.
Post-quantum cryptography aims to develop new cryptographic algorithms that are resistant to attacks from both classical and quantum computers. The development and adoption of post-quantum cryptographic algorithms are crucial to ensure the security and confidentiality of sensitive data in a future where quantum computers become powerful enough to threaten existing cryptographic systems. It is important to migrate to post-quantum cryptography well in advance to ensure a smooth and secure transition once quantum computers become more widely available.
It is crucial to bear in mind that PQC algorithms are currently undergoing intensive development and testing. Consequently, their utilization carries the risk of potential security vulnerabilities. This underscores the necessity of implementing crypto agility mechanisms.