diff --git a/swh/graphql/tests/functional/test_search.py b/swh/graphql/tests/functional/test_search.py
--- a/swh/graphql/tests/functional/test_search.py
+++ b/swh/graphql/tests/functional/test_search.py
@@ -41,7 +41,7 @@
                     "targetType": "origin",
                 }
             ],
-            "pageInfo": {"endCursor": "MQ==", "hasNextPage": True},
+            "pageInfo": {"endCursor": "VFJLSkplR1IxSkpFSEROT0hU", "hasNextPage": True},
         }
     }
 
diff --git a/swh/graphql/tests/unit/utils/test_utils.py b/swh/graphql/tests/unit/utils/test_utils.py
--- a/swh/graphql/tests/unit/utils/test_utils.py
+++ b/swh/graphql/tests/unit/utils/test_utils.py
@@ -5,6 +5,8 @@
 
 import datetime
 
+import pytest
+
 from swh.graphql.utils import utils
 
 
@@ -22,12 +24,22 @@
         assert utils.get_encoded_cursor(None) is None
         assert utils.get_encoded_cursor("testing") == "dGVzdGluZw=="
 
+    def test_get_encoded_numeric_cursor(self):
+        assert utils.get_encoded_cursor("1003") == "VFJLSkplR1IxMDAzSkpFSEROT0hU"
+
     def test_get_decoded_cursor_is_none(self):
         assert utils.get_decoded_cursor(None) is None
 
     def test_get_decoded_cursor(self):
         assert utils.get_decoded_cursor("dGVzdGluZw==") == "testing"
 
+    def test_get_decoded_numeric_cursor(self):
+        assert utils.get_decoded_cursor("VFJLSkplR1IxMDAzSkpFSEROT0hU") == "1003"
+
+    @pytest.mark.parametrize("cursor", ["FOO", "00", "test"])
+    def test_cursor_decode_encode_reverse(self, cursor):
+        assert cursor == utils.get_decoded_cursor(utils.get_encoded_cursor(cursor))
+
     def test_get_formatted_date(self):
         date = datetime.datetime(
             2015, 8, 4, 22, 26, 14, 804009, tzinfo=datetime.timezone.utc
diff --git a/swh/graphql/utils/utils.py b/swh/graphql/utils/utils.py
--- a/swh/graphql/utils/utils.py
+++ b/swh/graphql/utils/utils.py
@@ -10,6 +10,8 @@
 from swh.storage.interface import PagedResult
 
 ENCODING = "utf-8"
+CURSOR_PREFIX = "TRKJJeGR"
+CURSOR_SUFFIX = "JJEHDNOHT"
 
 
 def get_b64_string(source) -> str:
@@ -21,13 +23,25 @@
 def get_encoded_cursor(cursor: Optional[str]) -> Optional[str]:
     if cursor is None:
         return None
+    if type(cursor) == str and cursor.isnumeric():
+        # Add two random strings to make cursor a bit more opaque
+        # add this only when the cursor is numeric, this check is
+        # to avoid making cursor unnecessarily longer in other situations
+        # (eg: in snapshot-branches the branch name is used as the cursor)
+        cursor = CURSOR_PREFIX + cursor + CURSOR_SUFFIX
     return get_b64_string(cursor)
 
 
 def get_decoded_cursor(cursor: Optional[str]) -> Optional[str]:
     if cursor is None:
         return None
-    return base64.b64decode(cursor, validate=True).decode()
+    # strip the added random strings from left and right
+    return (
+        base64.b64decode(cursor, validate=True)
+        .decode()
+        .removeprefix(CURSOR_PREFIX)
+        .removesuffix(CURSOR_SUFFIX)
+    )
 
 
 def get_formatted_date(date: datetime) -> str: