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c: Copyright (C) Daniel Stenberg, daniel@haxx.se, et al. SPDX-License-Identifier: curl Long: tls13-ciphers Arg: help: TLS 1.3 cipher suites to use Protocols: TLS Category: tls Added: 7.61.0 Multi: single See-also:

• ciphers
• curves
• proxy-tls13-ciphers Example:
• --tls13-ciphers TLS_AES_128_GCM_SHA256 $URL

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--tls13-ciphers

Specifies which cipher suites to use in the connection if it negotiates TLS 1.3. The list of ciphers suites must specify valid ciphers. Read up on TLS 1.3 cipher suite details on this URL:

https://curl.se/docs/ssl-ciphers.html

This option is currently used only when curl is built to use OpenSSL 1.1.1 or later, or Schannel. If you are using a different SSL backend you can try setting TLS 1.3 cipher suites by using the --ciphers option.