This article is intended for enterprise and education network administrators. In iOS 26, iPadOS 26, macOS Tahoe 26 and visionOS 26, TLS-protected connections will automatically advertise support for hybrid, quantum-secure key exchange in TLS 1.3. This allows negotiation of a quantum-secure key exchange algorithm with TLS 1.3 servers that support it, while helping to maintain compatibility with servers that do not yet support this new algorithm. Use of quantum-secure encryption, also called “post...