Trendora
vien

HelloRetryRequest

Hold

Techniques

A TLS 1.3 mechanism that asks the client to retry the handshake with different parameters.

Why it's here

Placed in Hold: 1 article(s) of evidence from 2 source(s), led by security coverage, with 0 in the last 30 days. Confidence 32%.

Evidence (1)

  • 8Cloudflare Blog·9/8/2026security
    Cloudflare automates post-quantum origin key exchange

    Cloudflare has introduced Automatic Key Exchange for origin TLS 1.3 connections, replacing manual algorithm guessing with measured probing of each origin’s supported key agreement methods. The rollout reduces HelloRetryRequests and handshake latency, while expanding automatic post-quantum hybrid connections using X25519MLKEM768 across hundreds of thousands of domains.