diff --git a/telethon/sessions/abstract.py b/telethon/sessions/abstract.py
index dd1541ab..d92e0754 100644
--- a/telethon/sessions/abstract.py
+++ b/telethon/sessions/abstract.py
@@ -1,13 +1,18 @@
 from abc import ABC, abstractmethod
 import time
 import platform
+import struct
+import os
 
 
 class Session(ABC):
     def __init__(self):
+        self.id = struct.unpack('q', os.urandom(8))[0]
+
         self._sequence = 0
         self._last_msg_id = 0
         self._time_offset = 0
+        self._salt = 0
 
         system = platform.uname()
         self._device_model = system.system or 'Unknown'
@@ -53,16 +58,6 @@ class Session(ABC):
     def auth_key(self, value):
         raise NotImplementedError
 
-    @property
-    @abstractmethod
-    def salt(self):
-        raise NotImplementedError
-
-    @salt.setter
-    @abstractmethod
-    def salt(self, value):
-        raise NotImplementedError
-
     @abstractmethod
     def close(self):
         raise NotImplementedError
@@ -96,6 +91,14 @@ class Session(ABC):
     def get_file(self, md5_digest, file_size, cls):
         raise NotImplementedError
 
+    @property
+    def salt(self):
+        return self._salt
+
+    @salt.setter
+    def salt(self, value):
+        self._salt = value
+
     @property
     def device_model(self):
         return self._device_model
diff --git a/telethon/sessions/memory.py b/telethon/sessions/memory.py
index 71d6e551..7ab31b21 100644
--- a/telethon/sessions/memory.py
+++ b/telethon/sessions/memory.py
@@ -28,10 +28,10 @@ class _SentFileType(Enum):
 class MemorySession(Session):
     def __init__(self):
         super().__init__()
+
         self._dc_id = None
         self._server_address = None
         self._port = None
-        self._salt = None
         self._auth_key = None
 
         self._files = {}
@@ -58,14 +58,6 @@ class MemorySession(Session):
     def auth_key(self, value):
         self._auth_key = value
 
-    @property
-    def salt(self):
-        return self._salt
-
-    @salt.setter
-    def salt(self, value):
-        self._salt = value
-
     def close(self):
         pass
 
diff --git a/telethon/sessions/sqlite.py b/telethon/sessions/sqlite.py
index 0ea26ae5..0423d88a 100644
--- a/telethon/sessions/sqlite.py
+++ b/telethon/sessions/sqlite.py
@@ -1,21 +1,13 @@
 import json
 import os
-import platform
 import sqlite3
-import struct
-import time
 from base64 import b64decode
 from os.path import isfile as file_exists
 from threading import Lock, RLock
 
-from .. import utils
-from .abstract import Session
 from .memory import MemorySession, _SentFileType
 from ..crypto import AuthKey
-from ..tl import TLObject
 from ..tl.types import (
-    PeerUser, PeerChat, PeerChannel,
-    InputPeerUser, InputPeerChat, InputPeerChannel,
     InputPhoto, InputDocument
 )
 
@@ -47,8 +39,6 @@ class SQLiteSession(MemorySession):
             if not self.filename.endswith(EXTENSION):
                 self.filename += EXTENSION
 
-        self.id = struct.unpack('q', os.urandom(8))[0]
-
         # Cross-thread safety
         self._seq_no_lock = Lock()
         self._msg_id_lock = Lock()
@@ -193,7 +183,7 @@ class SQLiteSession(MemorySession):
             self._auth_key = None
         c.close()
 
-    @Session.auth_key.setter
+    @MemorySession.auth_key.setter
     def auth_key(self, value):
         self._auth_key = value
         self._update_session_table()