RCS finally replaced SMS as the default carrier-grade messaging protocol, and the rollout was uglier than the marketing implied. We walk what Universal Profile actually standardizes, the carrier/Jibe split, the Apple interoperability saga, what end-to-end encryption covers in 2026 and what it does not, the SMS fallback that ruins your assumptions, and the honest cross-platform state of the messaging world.
Encryption
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RCS Messaging -
LUKS and Full-Disk Encryption: Root Partitions, TPM Unlock, and Key Management Full-disk encryption on Linux with LUKS beyond the installer defaults — how dm-crypt and LUKS headers work, keyslot and key rotation, TPM-backed and automated unlock, and a recovery plan for when you need one years later.
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Proxmox Backup Server In Depth A comprehensive guide to Proxmox Backup Server: deduplication internals, encryption, tape support, replication between PBS instances, retention policies, restoring at scale, and operating PBS reliably in production.