https://nalar.dev/tags/replay/ Recent content in Replay on Nalar Hugo en-us Sat, 19 Sep 2026 00:00:00 +0000 https://nalar.dev/tls-1-3-early-data-trades-one-round-trip-for-replay-exposure/ Sat, 19 Sep 2026 00:00:00 +0000 https://nalar.dev/tls-1-3-early-data-trades-one-round-trip-for-replay-exposure/ <p>A resumed TLS 1.3 connection can carry application bytes before the server finishes the new handshake. That latency reduction changes a security boundary: early data is protected in transit, yet the protocol does not give it the same replay property as ordinary post-handshake application data.</p> <p>The distinction matters when an endpoint maps one request to a state-changing operation. A captured early-data flight can be presented again under conditions in which a server accepts it, so confidentiality and integrity on the wire do not imply single execution.</p>