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-rw-r--r--Doc/whatsnew/3.4.rst29
1 files changed, 24 insertions, 5 deletions
diff --git a/Doc/whatsnew/3.4.rst b/Doc/whatsnew/3.4.rst
index d07fa8c..6b65f2e 100644
--- a/Doc/whatsnew/3.4.rst
+++ b/Doc/whatsnew/3.4.rst
@@ -123,9 +123,9 @@ Significantly Improved Library Modules:
CPython implementation improvements:
-* :ref:`PEP 442: Safe object finalization <pep-442>`
-* :ref:`PEP 445: Configurable memory allocators <pep-445>`
-* :pep:`456` Secure and interchangeable hash algorithm
+* :pep:`442`: :ref:`Safe object finalization <whatsnew-pep-442>`
+* :pep:`445`: :ref:`Configurable memory allocators <whatsnew-pep-445>`
+* :pep:`456`: :ref:`Secure and interchangeable hash algorithm <whatsnew-pep-456>`
* Improve finalization of Python modules to avoid setting their globals
to None, in most cases (:issue:`18214`).
* A more efficient :mod:`marshal` format (:issue:`16475`).
@@ -909,7 +909,7 @@ CPython Implementation Changes
==============================
-.. _pep-445:
+.. _whatsnew-pep-445:
PEP 445: Customization of CPython memory allocators
---------------------------------------------------
@@ -923,7 +923,7 @@ the CPython interpreter.
PEP written and implemented by Victor Stinner.
-.. _pep-442:
+.. _whatsnew-pep-442:
PEP 442: Safe object finalization
---------------------------------
@@ -943,6 +943,25 @@ on the normal operation of the cyclic garbage collector.
PEP written and implemented by Antoine Pitrou.
+.. _whatsnew-pep-456:
+
+PEP 456: Secure and Interchangeable Hash Algorithm
+--------------------------------------------------
+
+:pep:`456` follows up on earlier security fix work done on Python's hash
+algorithm to address certain DOS attacks to which public facing APIs backed by
+dictionary lookups may be subject. (See :issue:`14621` for the start of the
+current round of improvements.) The PEP unifies CPython's hash code to make it
+easier for a packager to substitute a different hash algorithm, and switches
+Python's default implementation to a SipHash implementation on platforms that
+have a 64 bit data type. Any performance differences in comparison with the
+older FNV algorithm are trivial.
+
+The PEP adds additional fields to the :func:`sys.hash_info` struct sequence to
+describe the hash algorithm in use by the currently executing binary. Otherwise,
+the PEP does not alter any existing CPython APIs.
+
+
Other build and C API changes
-----------------------------