GnuPG version 2.5.19 introduces the Kyber post-quantum encryption algorithm and SHA256 key fingerprints to secure communications against future quantum computing threats. The transition to quantum-safe encryption is being compared to Y2K, with the underlying migration requiring significant effort despite remaining largely seamless for average users. This update is considered critical to mitigate the risk of previously intercepted encrypted data being compromised once quantum decryption becomes viable.