1theory All_Symmetric
2imports Message
3begin
4
5text \<open>All keys are symmetric\<close>
6
7overloading all_symmetric \<equiv> all_symmetric
8begin
9  definition "all_symmetric \<equiv> True"
10end
11
12lemma isSym_keys: "K \<in> symKeys"
13  by (simp add: symKeys_def all_symmetric_def invKey_symmetric) 
14
15end
16