diff --git a/OVERVIEW.md b/OVERVIEW.md
index e634f31b..3ff870b4 100644
--- a/OVERVIEW.md
+++ b/OVERVIEW.md
@@ -313,6 +313,27 @@ Redis and ARDB overview
 | | |
 | domain_pgpdump_**pgp_type**:**domain** | **key** |
 
+#### SimpleCorrelation:
+##### zset:
+| Key | Field | Value |
+| ------ | ------ | ------ |
+| s_correl:*correlation name*:all | *object_id* | *nb_seen* |
+| s_correl:date:*correlation name*:*date_day* | *object_id* | *nb_seen |
+
+##### set:
+| Key | Value |
+| ------ | ------ |
+| s_correl:set_*object type*_*correlation name*:*object_id* | *item_id* |
+| *object type*:s_correl:*correlation name*:*object_id* | *correlation_id* |
+
+object type: item + domain
+
+##### hset:
+| Key | Field | Value |
+| ------ | ------ | ------ |
+| 's_correl:*correlation name*:metadata:*obj_id* | first_seen | *first_seen* |
+| 's_correl:*correlation name*:metadata:*obj_id* | last_seen | *last_seen* |
+
 #### Cryptocurrency
 
 Supported cryptocurrency:
diff --git a/bin/lib/simple_correlation.py b/bin/lib/simple_correlation.py
new file mode 100755
index 00000000..8f215c23
--- /dev/null
+++ b/bin/lib/simple_correlation.py
@@ -0,0 +1,282 @@
+#!/usr/bin/env python3
+# -*-coding:UTF-8 -*
+
+import os
+import sys
+import redis
+
+sys.path.append(os.path.join(os.environ['AIL_BIN'], 'lib/'))
+import ConfigLoader
+
+sys.path.append(os.path.join(os.environ['AIL_BIN'], 'packages/'))
+import Date
+import Item
+#import Tag
+
+config_loader = ConfigLoader.ConfigLoader()
+r_serv_metadata = config_loader.get_redis_conn("ARDB_Metadata")
+config_loader = None
+
+def get_all_correlation_objects():
+    '''
+    Return a list of all correllated objects
+    '''
+    return ['domain', 'paste']
+
+class SimpleCorrelation(object): #social_name
+
+    def __init__(self, correlation_name):
+        self.correlation_name = correlation_name
+
+    def exist_correlation(self, obj_id):
+        res = r_serv_metadata.zscore('s_correl:{}:all'.format(self.correlation_name), obj_id)
+        if res is not None:
+            return True
+        else:
+            return False
+
+    def _get_items(self, obj_id):
+        res =  r_serv_metadata.smembers('s_correl:set_item_{}:{}'.format(self.correlation_name, obj_id))
+        if res:
+            return list(res)
+        else:
+            return []
+
+    def get_correlation_first_seen(self, obj_id, r_int=False):
+        res = r_serv_metadata.hget('s_correl:{}:metadata:{}'.format(self.correlation_name, obj_id), 'first_seen')
+        if r_int:
+            if res:
+                return int(res)
+            else:
+                return 99999999
+        else:
+            return res
+
+    def get_correlation_last_seen(self, obj_id, r_int=False):
+        res = r_serv_metadata.hget('s_correl:{}:metadata:{}'.format(self.correlation_name, obj_id), 'last_seen')
+        if r_int:
+            if res:
+                return int(res)
+            else:
+                return 0
+        else:
+            return res
+
+    def _get_metadata(self, obj_id):
+        meta_dict = {}
+        meta_dict['first_seen'] = self.get_correlation_first_seen(obj_id)
+        meta_dict['last_seen'] = self.get_correlation_last_seen(obj_id)
+        meta_dict['nb_seen'] = r_serv_metadata.scard('s_correl:set_item_{}:{}'.format(self.correlation_name, obj_id))
+        return meta_dict
+
+    def get_metadata(self, correlation_type, field_name, date_format='str_date'):
+        meta_dict = self._get_metadata(obj_id)
+        if date_format == "str_date":
+            if meta_dict['first_seen']:
+                meta_dict['first_seen'] = '{}/{}/{}'.format(meta_dict['first_seen'][0:4], meta_dict['first_seen'][4:6], meta_dict['first_seen'][6:8])
+            if meta_dict['last_seen']:
+                meta_dict['last_seen'] = '{}/{}/{}'.format(meta_dict['last_seen'][0:4], meta_dict['last_seen'][4:6], meta_dict['last_seen'][6:8])
+        return meta_dict
+
+    def get_nb_object_seen_by_date(self, obj_id, date_day):
+        nb = r_serv_metadata.zscore('s_correl:date:{}:{}'.format(self.correlation_name, date_day), obj_id)
+        if nb is None:
+            return 0
+        else:
+            return int(nb)
+
+    def get_list_nb_previous_correlation_object(self, obj_id, numDay):
+        nb_previous_correlation = []
+        for date_day in Date.get_previous_date_list(numDay):
+            nb_previous_correlation.append(self.get_nb_object_seen_by_date(obj_id, date_day))
+        return nb_previous_correlation
+
+    def _get_correlation_by_date(self, date_day):
+        return r_serv_metadata.zrange('s_correl:date:{}:{}'.format(self.correlation_name, date_day), 0, -1)
+
+    # def verify_correlation_field_request(self, request_dict, correlation_type, item_type='paste'):
+    #     if not request_dict:
+    #         return ({'status': 'error', 'reason': 'Malformed JSON'}, 400)
+    #
+    #     field_name = request_dict.get(correlation_type, None)
+    #     if not field_name:
+    #         return ( {'status': 'error', 'reason': 'Mandatory parameter(s) not provided'}, 400 )
+    #     if not self._exist_corelation_field(correlation_type, field_name, item_type=item_type):
+    #         return ( {'status': 'error', 'reason': 'Item not found'}, 404 )
+
+    def get_correlation(self, request_dict, obj_id):
+        dict_resp = {}
+
+        if request_dict.get('items'):
+            dict_resp['items'] = self._get_items(obj_id)
+
+        if request_dict.get('metadata'):
+            dict_resp['metadata'] = self._get_metadata(obj_id)
+        return (dict_resp, 200)
+
+    def _get_domain_correlation_obj(self, domain):
+        '''
+        Return correlation of a given domain.
+
+        :param domain: crawled domain
+        :type domain: str
+        :param correlation_type: correlation type
+        :type correlation_type: str
+
+        :return: a list of correlation
+        :rtype: list
+        '''
+        res = r_serv_metadata.smembers('domain:s_correl:{}:{}'.format(self.correlation_name, domain))
+        if res:
+            return list(res)
+        else:
+            return []
+
+    def _get_correlation_obj_domain(self, correlation_id):
+        '''
+        Return all domains that contain this correlation.
+
+        :param domain: field name
+        :type domain: str
+        :param correlation_type: correlation type
+        :type correlation_type: str
+
+        :return: a list of correlation
+        :rtype: list
+        '''
+        res = r_serv_metadata.smembers('s_correl:set_domain_{}:{}'.format(self.correlation_name, correlation_id))
+        if res:
+            return list(res)
+        else:
+            return []
+
+    def _get_item_correlation_obj(self, item_id):
+        '''
+        Return correlation of a given item id.
+
+        :param item_id: item id
+        :type item_id: str
+
+        :return: a list of correlation
+        :rtype: list
+        '''
+        res = r_serv_metadata.smembers('item:s_correl:{}:{}'.format(self.correlation_name, item_id))
+        if res:
+            return list(res)
+        else:
+            return []
+
+    # def get_correlation_all_object(self, correlation_type, correlation_value, correlation_objects=[]):
+    #     if not correlation_objects:
+    #         correlation_objects = get_all_correlation_objects()
+    #     correlation_obj = {}
+    #     for correlation_object in correlation_objects:
+    #         if correlation_object == 'paste':
+    #             res = self._get_items(correlation_type, correlation_value)
+    #         elif correlation_object == 'domain':
+    #             res = self.get_correlation_obj_domain(correlation_value, correlation_type=correlation_type)
+    #         else:
+    #             res = None
+    #         if res:
+    #             correlation_obj[correlation_object] = res
+    #     return correlation_obj
+
+    def update_correlation_daterange(self, obj_id, date):
+        date = int(date)
+        # obj_id don't exit
+        if not r_serv_metadata.exists('s_correl:{}:metadata:{}'.format(self.correlation_name, obj_id)):
+            r_serv_metadata.hset('s_correl:{}:metadata:{}'.format(self.correlation_name, obj_id), 'first_seen', date)
+            r_serv_metadata.hset('s_correl:{}:metadata:{}'.format(self.correlation_name, obj_id), 'last_seen', date)
+        else:
+            first_seen = self.get_correlation_last_seen(obj_id, r_int=True)
+            last_seen = self.get_correlation_first_seen(obj_id, r_int=True)
+            if date < first_seen:
+                r_serv_metadata.hset('s_correl:{}:metadata:{}'.format(self.correlation_name, obj_id), 'first_seen', date)
+            if date > last_seen:
+                r_serv_metadata.hset('s_correl:{}:metadata:{}'.format(self.correlation_name, obj_id), 'last_seen', date)
+
+    def save_item_correlation(self, obj_id, item_id, item_date):
+        self.update_correlation_daterange(obj_id, item_date)
+        # global set
+        r_serv_metadata.sadd('s_correl:set_item_{}:{}'.format(self.correlation_name, obj_id), item_id)
+
+        # daily
+        r_serv_metadata.zincrby('s_correl:date:{}:{}'.format(self.correlation_name, item_date), obj_id, 1)
+
+        # all correlation
+        r_serv_metadata.zincrby('s_correl:{}:all'.format(self.correlation_name), obj_id, 1)
+
+        # item
+        r_serv_metadata.sadd('item:s_correl:{}:{}'.format(self.correlation_name, item_id), obj_id)
+
+        # domain
+        if Item.is_crawled(item_id):
+            domain = Item.get_item_domain(item_id)
+            self.save_domain_correlation(domain, subtype, obj_id)
+
+    def delete_item_correlation(self, subtype, obj_id, item_id, item_date):
+        #self.update_correlation_daterange ! # # TODO:
+        r_serv_metadata.srem('s_correl:set_item_{}:{}'.format(self.correlation_name, obj_id), item_id)
+        r_serv_metadata.srem('item:s_correl:{}:{}'.format(self.correlation_name, item_id), obj_id)
+
+        res = r_serv_metadata.zincrby('s_correl:date:{}:{}'.format(self.correlation_name, item_date), obj_id, -1)
+        if int(res) < 0: # remove last
+            r_serv_metadata.zrem('s_correl:date:{}:{}'.format(self.correlation_name, item_date), obj_id)
+
+        res = r_serv_metadata.zscore('s_correl:{}:all'.format(self.correlation_name), obj_id)
+        if int(res) > 0:
+            r_serv_metadata.zincrby('s_correl:{}:all'.format(self.correlation_name), obj_id, -1)
+
+    def save_domain_correlation(self, domain, obj_id):
+        r_serv_metadata.sadd('domain:s_correl:{}:{}'.format(self.correlation_name, domain), obj_id)
+        r_serv_metadata.sadd('s_correl:set_domain_{}:{}'.format(self.correlation_name, obj_id), domain)
+
+    def delete_domain_correlation(self, domain, obj_id):
+        r_serv_metadata.srem('domain:s_correl:{}:{}'.format(self.correlation_name, domain), obj_id)
+        r_serv_metadata.srem('s_correl:set_domain_{}:{}'.format(self.correlation_name, obj_id), domain)
+
+    ######
+
+    def save_correlation(self, obj_id, date_range):
+        r_serv_metadata.zincrby('s_correl:{}:all'.format(self.correlation_name), obj_id, 0)
+        self.update_correlation_daterange(obj_id, date_range['date_from'])
+        if date_range['date_from'] != date_range['date_to']:
+            self.update_correlation_daterange(obj_id, date_range['date_to'])
+        return True
+
+    def save_obj_relationship(self, obj_id, obj2_type, obj2_id):
+        if obj2_type == 'domain':
+            self.save_domain_correlation(obj2_id, obj_id)
+        elif obj2_type == 'item':
+            self.save_item_correlation(obj_id, obj2_id, Item.get_item_date(obj2_id))
+
+    def delete_obj_relationship(self, obj_id, obj2_type, obj2_id):
+        if obj2_type == 'domain':
+            self.delete_domain_correlation(obj2_id, obj_id)
+        elif obj2_type == 'item':
+            self.delete_item_correlation(obj_id, obj2_id, Item.get_item_date(obj2_id))
+
+    # def create_correlation(self, subtype, obj_id, obj_meta):
+    #     res = self.sanythise_correlation_types([subtype], r_boolean=True)
+    #     if not res:
+    #         print('invalid subtype')
+    #         return False
+    #     first_seen = obj_meta.get('first_seen', None)
+    #     last_seen = obj_meta.get('last_seen', None)
+    #     date_range = Date.sanitise_date_range(first_seen, last_seen, separator='', date_type='datetime')
+    #     res = self.save_correlation(subtype, obj_id, date_range)
+    #     if res and 'tags' in obj_meta:
+    #         # # TODO: handle mixed tags: taxonomies and Galaxies
+    #         pass
+    #         #Tag.api_add_obj_tags(tags=obj_meta['tags'], object_id=obj_id, object_type=self.get_correlation_obj_type())
+    #     return True
+    #
+    # # # TODO: handle tags
+    # def delete_correlation(self, obj_id):
+    #     pass
+
+
+######## API EXPOSED ########
+
+
+########  ########
diff --git a/bin/packages/modules.cfg b/bin/packages/modules.cfg
index 2dc94e38..a519403e 100644
--- a/bin/packages/modules.cfg
+++ b/bin/packages/modules.cfg
@@ -34,6 +34,10 @@ publish = Redis_Tags
 subscribe = Redis_Global
 publish = Redis_Tags
 
+[Telegram]
+subscribe = Redis_Global
+publish = Redis_Tags
+
 [Categ]
 subscribe = Redis_Global
 publish = Redis_CreditCards,Redis_Mail,Redis_Onion,Redis_Web,Redis_Credential,Redis_SourceCode,Redis_Cve,Redis_ApiKey