diff --git a/phishing/machinetag.json b/phishing/machinetag.json
index 979fbc8..658b68b 100644
--- a/phishing/machinetag.json
+++ b/phishing/machinetag.json
@@ -37,6 +37,11 @@
       "value": "psychological-acceptability",
       "expanded": "Psychological acceptability",
       "description": "Quality of the phishing by its level of acceptance by the target."
+    },
+    {
+      "value": "principle-of-persuasion",
+      "expanded": "Principle of Persuasion",
+      "description": "The principle of persuasion used durin the attack to higher psychological acceptability."
     }
   ],
   "values": [
@@ -193,6 +198,31 @@
           "numerical_value": 75
         }
       ]
+    },
+    {
+      "predicate": "principle-of-persuasion",
+      "entry": [
+        {
+          "value": "authority",
+          "expanded": "Society trains people not to question authority so they are conditioned to respond to it. People usually follow an expert or pretense of authority and do a great deal for someone they think is an authority."
+        },
+        {
+          "value": "social-proof",
+          "expanded": "People tend to mimic what the majority of people do or seem to be doing. People let their guard and suspicion down when everyone else appears to share the same behaviours and risks. In this way, they will not be held solely responsible for their actions."
+        },
+        {
+          "value": "liking-similarity-deception",
+          "expanded": "People prefer to abide to whom (they think) they know or like, or to whom they are similar to or familiar with, as well as attracted to."
+        },
+        {
+          "value": "commitment-reciprocation-consistency",
+          "expanded": "People feel more confident in their decision once they commit (publically) to a specific action and need to follow it through until the end. This is true whether in the workplace, or in a situation when their action is illegal. People have tendency to believe what others say and need, and they want to appear consistent in what they do, for instance, when they owe a favour. There is an automatic response of repaying a favour."
+        },
+        {
+          "value": "distraction",
+          "expanded": "People focus on one thing and ignore other things that may happen without them noticing; they focus attention on what they can gain, what they need, what they can lose or miss out on, or if that thing will soon be unavailable, has been censored, restricted or will be more expensive later. These distractions can heighten people’s emotional state and make them forget other logical facts to consider when making decisions."
+        }
+      ]
     }
   ]
 }