Key meshing example

[gost-www.git] / en / meshing.texi

diff --git a/en/meshing.texi b/en/meshing.texi
index ff3292b050ddbd819869eb73461fb3e597784798..2521f7147a8e078105b8ab64dd5d233fa2e04620 100644 (file)
--- a/en/meshing.texi
+++ b/en/meshing.texi
@@ -10,6 +10,14 @@ developers tell that it is intended to resist side-channel attacks.
 Implementation is rather simple and uses two crypt/decrypt operations
 over the key and initialization vector.
 
+@verbatim
+# for each KiB of data
+def mesh(old_key, old_iv):
+    new_key = ecb_decrypt(old_key, MESH_CONST)
+    new_iv = ecb_encrypt(old_key, old_iv)
+    return new_key, new_iv
+@end verbatim
+
 It has already showed usefulness: there is @url{https://sweet32.info/,
 Sweet32} attack on all 64-bit blockciphers, that is not applicable to
 when key meshing used.