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src/HOL/Auth/TLS.thy
changeset 11655 923e4d0d36d5
parent 11287 0103ee3082bf
child 13507 febb8e5d2a9d 
--- a/src/HOL/Auth/TLS.thy	Wed Oct 03 20:54:05 2001 +0200
+++ b/src/HOL/Auth/TLS.thy	Wed Oct 03 20:54:16 2001 +0200
@@ -614,7 +614,7 @@
 (*Knowing some session keys is no help in getting new nonces*)
 lemma analz_insert_key [simp]:
      "evs \<in> tls ==>
-      Nonce N \<in> analz (insert (Key (sessionK z)) (spies evs)) =
+      (Nonce N \<in> analz (insert (Key (sessionK z)) (spies evs))) =
       (Nonce N \<in> analz (spies evs))"
 by (simp del: image_insert
          add: insert_Key_singleton analz_image_keys)
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