TLDR Tech / Practical
Post-quantum TLS requires independent migration for cloud API links
The author contends that adopting post-quantum TLS necessitates treating each direct TLS connection between adjacent endpoints as a separate migration point, rather than solely updating the public-facing edge. Performance tests on an Apple M3 Pro using X25519MLKEM768 revealed a 25.3% rise in CPU usage per handshake and a 193.3% increase in TLS-record data size, demonstrating that connection reuse and packet size limitations significantly impact the actual costs of cloud deployments.
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