diff --git a/steam_chat_logger.py b/steam_chat_logger.py
index f003e52..ea4bed3 100755
--- a/steam_chat_logger.py
+++ b/steam_chat_logger.py
@@ -91,6 +91,7 @@ import pytz
 import re
 from urllib.parse import urlparse
 import requests
+from hashlib import sha3_256
 
 pdt = pytz.timezone("Us/Pacific")
 
@@ -103,7 +104,10 @@ def parse_trs(trs):
         to_name = tds[1].text
         date = datetime.strptime(tds[2].text, '%b %d, %Y @ %I:%M%p PDT').replace(tzinfo=pdt)
         text = tds[3].text
-        print(f'({date}) {from_name} -> {to_name}: {text}')
+        checksum = sha3_256(
+            (from_url + to_url + str(date.timestamp()) + text).encode()
+        ).hexdigest()
+        print(f'(#{checksum}@{date}) {from_name} -> {to_name}: {text}')
 
         # download steamuserimages
         for url_string in re.findall(r'(https?://\S+)', text):