HEX
Server: Apache
System: Linux beluga.o2switch.net 4.18.0-553.123.2.lve.el8.x86_64 #1 SMP Thu May 7 23:17:13 UTC 2026 x86_64
User: sc3naki1272 (1113)
PHP: 8.3.33
Disabled: NONE
$ pwd: /opt/alt/python37/share/doc/alt-python37-cryptography/docs/x509/
Upload Files
File: //opt/alt/python37/share/doc/alt-python37-cryptography/docs/x509/index.rst
X.509
=====

X.509 is an ITU-T standard for a `public key infrastructure`_. X.509v3 is
defined in :rfc:`5280` (which obsoletes :rfc:`2459` and :rfc:`3280`). X.509
certificates are commonly used in protocols like `TLS`_.

.. toctree::
    :maxdepth: 2

    tutorial
    certificate-transparency
    reference

.. _`public key infrastructure`: https://en.wikipedia.org/wiki/Public_key_infrastructure
.. _`TLS`: https://en.wikipedia.org/wiki/Transport_Layer_Security
@ Telegram