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-rw-r--r--docs/primitives/symmetric-encryption.rst2
1 files changed, 2 insertions, 0 deletions
diff --git a/docs/primitives/symmetric-encryption.rst b/docs/primitives/symmetric-encryption.rst
index c0b36084..be6ed2ba 100644
--- a/docs/primitives/symmetric-encryption.rst
+++ b/docs/primitives/symmetric-encryption.rst
@@ -55,3 +55,5 @@ Modes
in a transmitted message). Should be
the same number of bytes as the ``key``
for the cipher.
+ ``initialization_vectors`` should never
+ be reused across different messages.