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-rw-r--r--docs/hazmat/bindings/interfaces.rst8
1 files changed, 8 insertions, 0 deletions
diff --git a/docs/hazmat/bindings/interfaces.rst b/docs/hazmat/bindings/interfaces.rst
index 98c099bb..c55d86dc 100644
--- a/docs/hazmat/bindings/interfaces.rst
+++ b/docs/hazmat/bindings/interfaces.rst
@@ -6,6 +6,14 @@ Backend Interfaces
.. currentmodule:: cryptography.hazmat.bindings.interfaces
+Backend implementations may provide a number of interfaces to support operations
+such as :doc:`/hazmat/primitives/symmetric-encryption`,
+:doc:`/hazmat/primitives/cryptographic-hashes`, and
+:doc:`/hazmat/primitives/hmac`.
+
+A specific ``backend`` may provide one or more of these interfaces.
+
+
.. class:: CipherBackend
A backend which provides methods for using ciphers for encryption