diff --git a/server.py b/server.py
index 53c4f95a2c562507b4c78dad179957363f546372..f5325b629c7db67039cdedcbacdb631f132d038b 100644
--- a/server.py
+++ b/server.py
@@ -49,12 +49,13 @@ PUBLIC_PORT = BIND_PORT
 ID_SALT = ""
 ID_PASSWORD = ""
 BMA_HOSTS = ["g1.duniter.fr 443", "g1.duniter.org 443", "g1.presles.fr 443", "g1.cgeek.fr 443", "ts.g1.librelois.fr 443"]
-MIX_INTERVAL = 60
+MIX_INTERVAL = 120
 MIX_MIN_TXS = 5 # minimum amount of txs to mix
 MIX_REQ_AGE_MAX = 604800 # maximum mix request age before return to sender
-PEER_INFO_INTERVAL = 60 # interval for renewing my peer document
-PEER_SIG_AGE_MAX = 600 # max age of a peer document signature
+PEER_INFO_INTERVAL = 600 # interval for renewing my peer document
+PEER_SIG_AGE_MAX = 604800 # max age of a peer document signature
 PEER_DETECT_INTERVAL = 120 # interval for fetching peer list
+CURRENCY = "g1"
 
 def send_response(client, code, resp, dataformat="ubjson"):
 	if dataformat == "ubjson":
@@ -179,6 +180,7 @@ def read_config(cdir, conf_overwrite={}):
 			utils.logprint("Config: bad JSON => abort", utils.LOG_ERROR)
 			exit(1)
 	
+	conf.setdefault("currency", CURRENCY)
 	conf.setdefault("server", {})
 	conf["server"].setdefault("bind_host", BIND_HOST)
 	conf["server"].setdefault("bind_port", BIND_PORT)
@@ -495,7 +497,7 @@ class ServerThread(Thread):
 			
 			if "new" in url:
 				try:
-					new_peer = utils.Peer(content)
+					new_peer = utils.Peer(self.conf, content)
 				except Exception as e: # TODO more specific exceptions
 					send_response(client, "400 Bad Request", {"error": "bad_peer"}, resp_format)
 					utils.logprint("Peer: bad peer: "+str(e), utils.LOG_ERROR)
@@ -580,7 +582,7 @@ class ClientThread(Thread):
 					continue
 				
 				try:
-					new_peer = utils.Peer(data["info"])
+					new_peer = utils.Peer(self.conf, data["info"])
 				except Exception as e:
 					print("Peer detection: info: "+str(e))
 				new_peers.setdefault(new_peer.hash, [])
@@ -588,7 +590,7 @@ class ClientThread(Thread):
 				
 				for raw in data["peers"]:
 					try:
-						new_peer = utils.Peer(raw)
+						new_peer = utils.Peer(self.conf, raw)
 					except Exception as e:
 						utils.logprint("Peer detection: "+str(e), utils.LOG_WARN)
 					if new_peer.hash == self.local_peer.hash:
@@ -829,7 +831,7 @@ def main():
 	# Load peers
 	peers = {}
 	db_peers = plyvel.DB(DIR+"/db_peers", create_if_missing=True)
-	utils.load_peers(db_peers, peers)
+	utils.load_peers(conf, db_peers, peers)
 	
 	# Load txs
 	pool = []
@@ -933,12 +935,12 @@ if __name__ == "__main__":
 		# Load peers
 		peers = {}
 		db_peers = plyvel.DB(DIR+"/db_peers", create_if_missing=True)
-		utils.load_peers(db_peers, peers)
+		utils.load_peers(conf, db_peers, peers)
 		
 		# Import peers
 		for raw in new_peers:
 			try:
-				new_peer = utils.Peer(raw)
+				new_peer = utils.Peer(conf, raw)
 			except Exception as e: # TODO more specific exceptions
 				print("Error: invalid peer data: "+str(e))
 				continue
diff --git a/utils.py b/utils.py
index a28a6e09cd0b5ddb569abbd8cc5fed2d32a5da11..0ee0ca18b42c5296f03f242204b9802182194a5f 100644
--- a/utils.py
+++ b/utils.py
@@ -126,7 +126,7 @@ def getargv(arg:str, default:str="", n:int=1, args:list=sys.argv) -> str:
 
 class Peer:
 	VERSION = "1"
-	def __init__(self, raw:bytes):
+	def __init__(self, conf:dict, raw:bytes):
 		self.rectime = time.time()
 		self.raw = raw
 		data = ubjson.loadb(raw)
@@ -136,6 +136,7 @@ class Peer:
 		# TODO try except
 		
 		# TODO tests
+		assert data["currency"] == conf["currency"] , "Not the same currency"
 		
 		self.doctype = data["doctype"]
 		self.docver = data["docver"]
@@ -156,6 +157,7 @@ class Peer:
 		data = {
 			"doctype": "peer",
 			"docver": Peer.VERSION,
+			"currency": conf["currency"],
 			"pubkey": keys.pubkey,
 			"sigtime": time.time(),
 			"host": [conf["server"]["public_host"], conf["server"]["public_port"]],
@@ -168,11 +170,11 @@ class Peer:
 			"raw": raw
 		}
 		raw = ubjson.dumpb(data)
-		return Peer(raw)
+		return Peer(conf, raw)
 
-def load_peers(db_peers:plyvel.DB, peers:dict):
+def load_peers(conf:dict, db_peers:plyvel.DB, peers:dict):
 	for _, data in db_peers:
-		peer = Peer(data)
+		peer = Peer(conf, data)
 		peers[peer.hash] = peer
 
 def save_peers(db_peers:plyvel.DB, peers:dict):