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+* View all known keys
+
+         signal-cli -u USERNAME listIdentities
+
+* View known keys of one number
+
+         signal-cli -u USERNAME listIdentities -n NUMBER
+
+* Trust new key, after having verified it
+
+         signal-cli -u USERNAME trust -v FINGER_PRINT NUMBER
+
+* Trust new key, without having verified it. Only use this if you don't care about security
+
+         signal-cli -u USERNAME trust -a NUMBER