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-rw-r--r--user_guide_src/source/general/security.rst4
1 files changed, 4 insertions, 0 deletions
diff --git a/user_guide_src/source/general/security.rst b/user_guide_src/source/general/security.rst
index 0c58f96b4..efc821f2b 100644
--- a/user_guide_src/source/general/security.rst
+++ b/user_guide_src/source/general/security.rst
@@ -133,6 +133,10 @@ with that. Please read below.
provides them for you as long as you're running at least PHP version
5.3.7 (and if you don't meet that requirement - please, upgrade).
+ If you're one of the really unlucky people who can't even upgrade to a
+ more recent PHP version, use `hash_pbkdf() <http://php.net/hash_pbkdf2>`,
+ which we also provide in our compatibility layer.
+
- DO NOT ever display or send a password in plain-text format!
Even to the password's owner, if you need a "Forgotten password"