NEGOBOTA conversational agent based on gametheory for the detection of paedophile
behaviour
Children have become active users of the Internet
One of the worst problems in cyber-society is
paedophile behaviour
Commercial systems
analyse conversationsto automatically classify them
Our approach?
Meet:
NEGOBOT
Objective:To detect paedophile
behaviour
As a chatter bot, negobot “knows” about:
Natural Language Processing
Information Retrieval
Automatic Learning
Game theory
Negobot’s architecture
AI’s system knowledge
Gathering groups of representative conversations
considered offensive.
http://www.perverted-justice.com
1377 conversations
We use Lucene in order to rank how similar areNegobot’s conversations with actual paedophile’sconversations
A system tounderstand the conversations
Replacing“emoticons”
SMS-like wordingtranslation
Correctingmisspelled words
1
Question-answering patterns(AIML) 2
Random responsewaiting times
Colloquial andSMS-like language
Forcedlanguage errors
3
Game theory
A structure of seven
chatterbots, with different behaviours 1
Conversation level
An evaluation function to classify, in real time, the
current conversation 2
𝒇 (𝒙 )=𝑨+𝑩+𝑪
𝒇 (𝒙 )=𝑨𝑨=𝑪𝒐𝒏𝒗𝒆𝒓𝒔𝒂𝒕𝒊𝒐𝒏𝑯𝒊𝒔𝒕𝒐𝒓𝒚
𝑩=𝑪𝒖𝒓𝒓𝒆𝒏𝒕 𝑪𝒐𝒏𝒗𝒆𝒓𝒔𝒂𝒕𝒊𝒐𝒏 𝒍𝒆𝒗𝒆𝒍
𝑪=𝑻𝒊𝒎𝒆𝒃𝒆𝒕𝒘𝒆𝒆𝒏𝒄𝒐𝒏𝒗𝒆𝒓𝒔𝒂𝒕𝒊𝒐𝒏𝒔
+𝑩+𝑪
Functional flow
EXAMPLES
Passiveconversation
Aggresiveconversation
Limitations?
The key is the language
Future?
WSD, opinion mining, …
ImproveAIML
Collaborativeagents
Working with the Spanish’ Cyber-crime unit…
…trying to find those monsters
References1. Little girl:
http://4.bp.blogspot.com/-qoMi9XA-pfE/UD4Il8NOF3I/AAAAAAAADH4/Dy83sETvTgI/s0/Bank+Interview+Tips.jpg
2. Predator: http://1.bp.blogspot.com/-ZkA7FRuhLu8/TouRfRHOwmI/AAAAAAAAahc/9auIEO8M1m4/s400/pedofilia%2B9%255B5%255D.jpg
3. Conversation icon: http://www.vendorregistry.com/images/home-slides/conversation-icon.png?sfvrsn=0
4. Lighthouse: http://lucaskrech.com/blog/wp-content/uploads/2010/04/lighthouse4tracing.jpg
5. Human brain: http://www.whyworrybook.com/wp-content/uploads/2013/01/canstockphoto1694623-2-brain-with-shooting-lines.jpg
6. Reveal-listen-understanding: http://2.bp.blogspot.com/-HXGhx9-CNts/UhWpYnBvSDI/AAAAAAAAAIE/Ic7EPi-f94A/s1600/understanding.jpg
7. Chess: http://2.bp.blogspot.com/-5_3295FDOd4/UcQvY6s05uI/AAAAAAAAa4I/IF9Pf_Qxa2w/s1600/Chess+HD+Pictures7.jpg
8. Prison: http://www.ereverev.co.il/UploadImg/Articles/12826.jpg