# TLS 1.3 La seguridad de transporte utilizada en QUIC usa TLS 1.3 ([RFC 8446](https://tools.ietf.org/html/rfc8446)) y nunca hay conexiones QUIC sin cifrar. TLS 1.3 tiene varias ventajas en comparación con las versiones anteriores de TLS, pero una de las principales razones para usarlo en QUIC es que 1.3 cambió el handshake para requerir menos viajes de ida y vuelta. Esto reduce la latencia del protocolo. La versión heredada de Google de QUIC utilizaba una criptografía personalizada. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://http3-explained.haxx.se/es/the-protocol/feature-tls.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.