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+.. _mozilla_projects_nss_nss_3_56_release_notes:
+
+NSS 3.56 release notes
+======================
+
+`Introduction <#introduction>`__
+--------------------------------
+
+.. container::
+
+   The NSS team has released Network Security Services (NSS) 3.56 on **21 August 2020**, which is a
+   minor release.
+
+.. _distribution_information:
+
+`Distribution Information <#distribution_information>`__
+--------------------------------------------------------
+
+.. container::
+
+   The HG tag is NSS_3_56_RTM. NSS 3.56 requires NSPR 4.28 or newer.
+
+   NSS 3.56 source distributions are available on ftp.mozilla.org for secure HTTPS download:
+
+   -  Source tarballs:
+      https://ftp.mozilla.org/pub/mozilla.org/security/nss/releases/NSS_3_56_RTM/src/
+
+   Other releases are available :ref:`mozilla_projects_nss_nss_releases`.
+
+.. _notable_changes_in_nss_3.56:
+
+`Notable Changes in NSS 3.56 <#notable_changes_in_nss_3.56>`__
+--------------------------------------------------------------
+
+.. container::
+
+   -  NSPR dependency updated to 4.28.
+   -  The known issue where Makefile builds failed to locate seccomon.h was fixed in `Bug
+      1653975 <https://bugzilla.mozilla.org/show_bug.cgi?id=1653975>`__.
+
+.. _bugs_fixed_in_nss_3.56:
+
+`Bugs fixed in NSS 3.56 <#bugs_fixed_in_nss_3.56>`__
+----------------------------------------------------
+
+.. container::
+
+   -  `Bug 1650702 <https://bugzilla.mozilla.org/show_bug.cgi?id=1650702>`__ - Support SHA-1 HW
+      acceleration on ARMv8
+   -  `Bug 1656981 <https://bugzilla.mozilla.org/show_bug.cgi?id=1656981>`__ - Use MPI comba and
+      mulq optimizations on x86-64 MacOS.
+   -  `Bug 1654142 <https://bugzilla.mozilla.org/show_bug.cgi?id=1654142>`__ - Add CPU feature
+      detection for Intel SHA extension.
+   -  `Bug 1648822 <https://bugzilla.mozilla.org/show_bug.cgi?id=1648822>`__ - Add stricter
+      validation of DH keys in FIPS mode.
+   -  `Bug 1656986 <https://bugzilla.mozilla.org/show_bug.cgi?id=1656986>`__ - Properly detect arm64
+      during GYP build architecture detection.
+   -  `Bug 1652729 <https://bugzilla.mozilla.org/show_bug.cgi?id=1652729>`__ - Add build flag to
+      disable RC2 and relocate to lib/freebl/deprecated.
+   -  `Bug 1656429 <https://bugzilla.mozilla.org/show_bug.cgi?id=1656429>`__ - Correct RTT estimate
+      used in 0-RTT anti-replay.
+   -  `Bug 1588941 <https://bugzilla.mozilla.org/show_bug.cgi?id=1588941>`__ - Send empty
+      certificate message when scheme selection fails.
+   -  `Bug 1652032 <https://bugzilla.mozilla.org/show_bug.cgi?id=1652032>`__ - Fix failure to build
+      in Windows arm64 makefile cross-compilation.
+   -  `Bug 1625791 <https://bugzilla.mozilla.org/show_bug.cgi?id=1625791>`__ - Fix deadlock issue in
+      nssSlot_IsTokenPresent.
+   -  `Bug 1653975 <https://bugzilla.mozilla.org/show_bug.cgi?id=1653975>`__ - Fix 3.53 regression
+      by setting "all" as the default makefile target.
+   -  `Bug 1659792 <https://bugzilla.mozilla.org/show_bug.cgi?id=1659792>`__ - Fix broken libpkix
+      tests with unexpired PayPal cert.
+   -  `Bug 1659814 <https://bugzilla.mozilla.org/show_bug.cgi?id=1659814>`__ - Fix interop.sh
+      failures with newer tls-interop commit and dependencies.
+   -  `Bug 1656519 <https://bugzilla.mozilla.org/show_bug.cgi?id=1656519>`__ - Update NSPR
+      dependency to 4.28.
+
+   This Bugzilla query returns all the bugs fixed in NSS 3.56:
+
+   https://bugzilla.mozilla.org/buglist.cgi?resolution=FIXED&classification=Components&query_format=advanced&product=NSS&target_milestone=3.56
+
+`Compatibility <#compatibility>`__
+----------------------------------
+
+.. container::
+
+   NSS 3.56 shared libraries are backward compatible with all older NSS 3.x shared libraries. A
+   program linked with older NSS 3.x shared libraries will work with NSS 3.56 shared libraries
+   without recompiling or relinking. Furthermore, applications that restrict their use of NSS APIs
+   to the functions listed in NSS Public Functions will remain compatible with future versions of
+   the NSS shared libraries.
+
+`Feedback <#feedback>`__
+------------------------
+
+.. container::
+
+   Bugs discovered should be reported by filing a bug report with
+   `bugzilla.mozilla.org <https://bugzilla.mozilla.org/enter_bug.cgi?product=NSS>`__ (product NSS).
+\ No newline at end of file