diff --git a/libp2p/security/simple/transport.py b/libp2p/security/simple/transport.py
deleted file mode 100644
index 28187d1..0000000
--- a/libp2p/security/simple/transport.py
+++ /dev/null
@@ -1,79 +0,0 @@
-import asyncio
-
-from libp2p.crypto.keys import KeyPair
-from libp2p.network.connection.raw_connection_interface import IRawConnection
-from libp2p.peer.id import ID
-from libp2p.security.base_transport import BaseSecureTransport
-from libp2p.security.insecure.transport import InsecureSession
-from libp2p.security.secure_conn_interface import ISecureConn
-from libp2p.transport.exceptions import SecurityUpgradeFailure
-from libp2p.utils import encode_fixedint_prefixed, read_fixedint_prefixed
-
-
-class SimpleSecurityTransport(BaseSecureTransport):
-    key_phrase: str
-
-    def __init__(self, local_key_pair: KeyPair, key_phrase: str) -> None:
-        super().__init__(local_key_pair)
-        self.key_phrase = key_phrase
-
-    async def secure_inbound(self, conn: IRawConnection) -> ISecureConn:
-        """
-        Secure the connection, either locally or by communicating with opposing node via conn,
-        for an inbound connection (i.e. we are not the initiator)
-        :return: secure connection object (that implements secure_conn_interface)
-        """
-        await conn.write(encode_fixedint_prefixed(self.key_phrase.encode()))
-        incoming = (await read_fixedint_prefixed(conn)).decode()
-
-        if incoming != self.key_phrase:
-            raise SecurityUpgradeFailure(
-                "Key phrase differed between nodes. Expected " + self.key_phrase
-            )
-
-        session = InsecureSession(
-            self.local_peer, self.local_private_key, conn, ID(b"")
-        )
-        # NOTE: Here we calls `run_handshake` for both sides to exchange their public keys and
-        #   peer ids, otherwise tests fail. However, it seems pretty weird that
-        #   `SimpleSecurityTransport` sends peer id through `Insecure`.
-        await session.run_handshake()
-        # NOTE: this is abusing the abstraction we have here
-        # but this code may be deprecated soon and this exists
-        # mainly to satisfy a test that will go along w/ it
-        # FIXME: Enable type check back when we can deprecate the simple transport.
-        session.key_phrase = self.key_phrase  # type: ignore
-        return session
-
-    async def secure_outbound(self, conn: IRawConnection, peer_id: ID) -> ISecureConn:
-        """
-        Secure the connection, either locally or by communicating with opposing node via conn,
-        for an inbound connection (i.e. we are the initiator)
-        :return: secure connection object (that implements secure_conn_interface)
-        """
-        await conn.write(encode_fixedint_prefixed(self.key_phrase.encode()))
-        incoming = (await read_fixedint_prefixed(conn)).decode()
-
-        # Force context switch, as this security transport is built for testing locally
-        # in a single event loop
-        await asyncio.sleep(0)
-
-        if incoming != self.key_phrase:
-            raise SecurityUpgradeFailure(
-                "Key phrase differed between nodes. Expected " + self.key_phrase
-            )
-
-        session = InsecureSession(
-            self.local_peer, self.local_private_key, conn, peer_id
-        )
-
-        # NOTE: Here we calls `run_handshake` for both sides to exchange their public keys and
-        #   peer ids, otherwise tests fail. However, it seems pretty weird that
-        #   `SimpleSecurityTransport` sends peer id through `Insecure`.
-        await session.run_handshake()
-        # NOTE: this is abusing the abstraction we have here
-        # but this code may be deprecated soon and this exists
-        # mainly to satisfy a test that will go along w/ it
-        # FIXME: Enable type check back when we can deprecate the simple transport.
-        session.key_phrase = self.key_phrase  # type: ignore
-        return session