diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6a4c6ece..161c456a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -356,7 +356,6 @@ set(TL_DOTNET_SCHEME_SOURCE
 
 set(TDLIB_SOURCE
   td/mtproto/AuthData.cpp
-  td/mtproto/crypto.cpp
   td/mtproto/DhHandshake.cpp
   td/mtproto/Handshake.cpp
   td/mtproto/HandshakeActor.cpp
@@ -367,6 +366,7 @@ set(TDLIB_SOURCE
   td/mtproto/PingConnection.cpp
   td/mtproto/ProxySecret.cpp
   td/mtproto/RawConnection.cpp
+  td/mtproto/RSA.cpp
   td/mtproto/SessionConnection.cpp
   td/mtproto/TcpTransport.cpp
   td/mtproto/TlsInit.cpp
@@ -494,7 +494,6 @@ set(TDLIB_SOURCE
 
   td/mtproto/AuthData.h
   td/mtproto/AuthKey.h
-  td/mtproto/crypto.h
   td/mtproto/CryptoStorer.h
   td/mtproto/DhHandshake.h
   td/mtproto/Handshake.h
@@ -511,6 +510,7 @@ set(TDLIB_SOURCE
   td/mtproto/ProxySecret.h
   td/mtproto/Query.h
   td/mtproto/RawConnection.h
+  td/mtproto/RSA.h
   td/mtproto/SessionConnection.h
   td/mtproto/TcpTransport.h
   td/mtproto/TlsInit.h
diff --git a/td/mtproto/Handshake.cpp b/td/mtproto/Handshake.cpp
index eb56e1b7..4563268a 100644
--- a/td/mtproto/Handshake.cpp
+++ b/td/mtproto/Handshake.cpp
@@ -6,7 +6,6 @@
 //
 #include "td/mtproto/Handshake.h"
 
-#include "td/mtproto/crypto.h"
 #include "td/mtproto/KDF.h"
 #include "td/mtproto/utils.h"
 
diff --git a/td/mtproto/Handshake.h b/td/mtproto/Handshake.h
index 46f0c69c..9669cb4c 100644
--- a/td/mtproto/Handshake.h
+++ b/td/mtproto/Handshake.h
@@ -7,8 +7,8 @@
 #pragma once
 
 #include "td/mtproto/AuthKey.h"
-#include "td/mtproto/crypto.h"
 #include "td/mtproto/DhHandshake.h"
+#include "td/mtproto/RSA.h"
 
 #include "td/utils/buffer.h"
 #include "td/utils/Slice.h"
diff --git a/td/mtproto/crypto.cpp b/td/mtproto/RSA.cpp
similarity index 98%
rename from td/mtproto/crypto.cpp
rename to td/mtproto/RSA.cpp
index 905228cf..a5825c2a 100644
--- a/td/mtproto/crypto.cpp
+++ b/td/mtproto/RSA.cpp
@@ -4,7 +4,7 @@
 // Distributed under the Boost Software License, Version 1.0. (See accompanying
 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
 //
-#include "td/mtproto/crypto.h"
+#include "td/mtproto/RSA.h"
 
 #include "td/mtproto/mtproto_api.h"
 
@@ -25,7 +25,6 @@
 
 namespace td {
 
-/*** RSA ***/
 RSA::RSA(BigNum n, BigNum e) : n_(std::move(n)), e_(std::move(e)) {
 }
 
diff --git a/td/mtproto/crypto.h b/td/mtproto/RSA.h
similarity index 95%
rename from td/mtproto/crypto.h
rename to td/mtproto/RSA.h
index 7d3f35d9..68ea42b7 100644
--- a/td/mtproto/crypto.h
+++ b/td/mtproto/RSA.h
@@ -15,7 +15,6 @@
 
 namespace td {
 
-/*** RSA ***/
 class RSA {
  public:
   RSA clone() const;
@@ -33,7 +32,6 @@ class RSA {
   BigNum e_;
 };
 
-/*** PublicRsaKeyInterface ***/
 class PublicRsaKeyInterface {
  public:
   virtual ~PublicRsaKeyInterface() = default;
diff --git a/td/telegram/ConfigManager.cpp b/td/telegram/ConfigManager.cpp
index a1dddae6..5ff78b36 100644
--- a/td/telegram/ConfigManager.cpp
+++ b/td/telegram/ConfigManager.cpp
@@ -27,8 +27,8 @@
 
 #include "td/mtproto/AuthData.h"
 #include "td/mtproto/AuthKey.h"
-#include "td/mtproto/crypto.h"
 #include "td/mtproto/RawConnection.h"
+#include "td/mtproto/RSA.h"
 #include "td/mtproto/TransportType.h"
 
 #include "td/net/HttpQuery.h"
diff --git a/td/telegram/Td.cpp b/td/telegram/Td.cpp
index 341181bf..93c896f1 100644
--- a/td/telegram/Td.cpp
+++ b/td/telegram/Td.cpp
@@ -99,11 +99,11 @@
 
 #include "td/db/binlog/BinlogEvent.h"
 
-#include "td/mtproto/crypto.h"
 #include "td/mtproto/DhHandshake.h"
 #include "td/mtproto/Handshake.h"
 #include "td/mtproto/HandshakeActor.h"
 #include "td/mtproto/RawConnection.h"
+#include "td/mtproto/RSA.h"
 #include "td/mtproto/TransportType.h"
 
 #include "td/utils/buffer.h"
diff --git a/td/telegram/net/PublicRsaKeyShared.h b/td/telegram/net/PublicRsaKeyShared.h
index efab0853..6aafb92d 100644
--- a/td/telegram/net/PublicRsaKeyShared.h
+++ b/td/telegram/net/PublicRsaKeyShared.h
@@ -8,7 +8,7 @@
 
 #include "td/telegram/net/DcId.h"
 
-#include "td/mtproto/crypto.h"
+#include "td/mtproto/RSA.h"
 
 #include "td/utils/common.h"
 #include "td/utils/port/RwMutex.h"
diff --git a/td/telegram/net/PublicRsaKeyWatchdog.cpp b/td/telegram/net/PublicRsaKeyWatchdog.cpp
index 25b96c44..20461046 100644
--- a/td/telegram/net/PublicRsaKeyWatchdog.cpp
+++ b/td/telegram/net/PublicRsaKeyWatchdog.cpp
@@ -12,7 +12,7 @@
 
 #include "td/telegram/telegram_api.h"
 
-#include "td/mtproto/crypto.h"
+#include "td/mtproto/RSA.h"
 
 #include "td/utils/logging.h"
 #include "td/utils/Time.h"
diff --git a/td/telegram/net/Session.cpp b/td/telegram/net/Session.cpp
index aa9bd034..c3b851b2 100644
--- a/td/telegram/net/Session.cpp
+++ b/td/telegram/net/Session.cpp
@@ -18,11 +18,11 @@
 #include "td/telegram/StateManager.h"
 #include "td/telegram/UniqueId.h"
 
-#include "td/mtproto/crypto.h"
 #include "td/mtproto/DhHandshake.h"
 #include "td/mtproto/Handshake.h"
 #include "td/mtproto/HandshakeActor.h"
 #include "td/mtproto/RawConnection.h"
+#include "td/mtproto/RSA.h"
 #include "td/mtproto/SessionConnection.h"
 #include "td/mtproto/TransportType.h"
 
diff --git a/test/mtproto.cpp b/test/mtproto.cpp
index 0e9648a9..cd126a75 100644
--- a/test/mtproto.cpp
+++ b/test/mtproto.cpp
@@ -10,7 +10,6 @@
 #include "td/actor/PromiseFuture.h"
 
 #include "td/mtproto/AuthData.h"
-#include "td/mtproto/crypto.h"
 #include "td/mtproto/DhHandshake.h"
 #include "td/mtproto/Handshake.h"
 #include "td/mtproto/HandshakeActor.h"
@@ -18,6 +17,7 @@
 #include "td/mtproto/PingConnection.h"
 #include "td/mtproto/ProxySecret.h"
 #include "td/mtproto/RawConnection.h"
+#include "td/mtproto/RSA.h"
 #include "td/mtproto/TlsInit.h"
 #include "td/mtproto/TransportType.h"