diff --git a/src/data/version/mozc_version_template.bzl b/src/data/version/mozc_version_template.bzl
index 5063f0e..bbeacca 100644
--- a/src/data/version/mozc_version_template.bzl
+++ b/src/data/version/mozc_version_template.bzl
@@ -30,7 +30,7 @@
 
 MAJOR=2
 MINOR=23
-BUILD=2810
+BUILD=2811
 REVISION=102
 # This version represents the version of Mozc IME engine (converter, predictor,
 # etc.).  This version info is included both in the Mozc server and in the Mozc
diff --git a/src/ipc/ipc.gyp b/src/ipc/ipc.gyp
index 0c237fd..bdbaca3 100644
--- a/src/ipc/ipc.gyp
+++ b/src/ipc/ipc.gyp
@@ -55,6 +55,11 @@
           'sources!': [
             'ipc_path_manager.cc',
             'process_watch_dog.cc',
+          ],
+        }],
+        ['target_platform=="Windows"', {
+          'dependencies': [
+            '../base/base.gyp:obfuscator_support',
           ],
         }],
       ],
diff --git a/src/ipc/ipc_path_manager.cc b/src/ipc/ipc_path_manager.cc
index fd9766b..aceb0d4 100644
--- a/src/ipc/ipc_path_manager.cc
+++ b/src/ipc/ipc_path_manager.cc
@@ -57,6 +57,9 @@
 #include "base/const.h"
 #include "base/file_stream.h"
 #include "base/file_util.h"
+#ifdef OS_WIN
+#include "base/unverified_sha1.h"
+#endif  // OS_WIN
 #include "base/logging.h"
 #include "base/mac_util.h"
 #include "base/mutex.h"
@@ -108,22 +111,15 @@
   return true;
 }
 
-void CreateIPCKey(char *value) {
-  char buf[16];   // key is 128 bit
-
-#ifdef OS_WIN
-  // LUID guaranties uniqueness
-  LUID luid = { 0 };   // LUID is 64bit value
-
-  DCHECK_EQ(sizeof(luid), sizeof(uint64));
-
-  // first 64 bit is random sequence and last 64 bit is LUID
-  if (::AllocateLocallyUniqueId(&luid)) {
-    Util::GetRandomSequence(buf, sizeof(buf) / 2);
-    ::memcpy(buf + sizeof(buf) / 2, &luid, sizeof(buf) / 2);
-  } else {
-    // use random value for failsafe
-    Util::GetRandomSequence(buf, sizeof(buf));
+string CreateIPCKey() {
+  char buf[16] = {};   // key is 128 bit
+  char value[kKeySize + 1] = {};
+
+#ifdef OS_WIN
+  const string sid = SystemUtil::GetUserSidAsString();
+  const string sha1 = internal::UnverifiedSHA1::MakeDigest(sid);
+  for (int i = 0; i < sizeof(buf) && i < sha1.size(); ++i) {
+    buf[i] = sha1.at(i);
   }
 #else
   // get 128 bit key: Note that collision will happen.
@@ -139,6 +135,7 @@
   }
 
   value[kKeySize] = '\0';
+  return string(value);
 }
 
 class IPCPathManagerMap {
@@ -191,9 +188,7 @@
 bool IPCPathManager::CreateNewPathName() {
   scoped_lock l(mutex_.get());
   if (ipc_path_info_->key().empty()) {
-    char ipc_key[kKeySize + 1];
-    CreateIPCKey(ipc_key);
-    ipc_path_info_->set_key(ipc_key);
+    ipc_path_info_->set_key(CreateIPCKey());
   }
   return true;
 }
@@ -244,13 +239,30 @@
   // On Windows, ShouldReload() always returns false.
   // On other platform, it returns true when timestamp of the file is different
   // from that of previous one.
-  if (ShouldReload() || ipc_path_info_->key().empty()) {
-    if (!LoadPathNameInternal()) {
-      LOG(ERROR) << "LoadPathName failed";
-      return false;
-    }
-  }
-  return true;
+  const bool should_load = (ShouldReload() || ipc_path_info_->key().empty());
+  if (!should_load) {
+    return true;
+  }
+
+  if (LoadPathNameInternal()) {
+    return true;
+  }
+
+#if defined(OS_WIN)
+  // Fill the default values as fallback.
+  // Applications conerted by Desktop App Converter (DAC) does not read
+  // a file of ipc session name in the LocalLow directory.
+  // For a workaround, let applications to connect the named pipe directly.
+  // See: b/71338191.
+  CreateNewPathName();
+  DCHECK(!ipc_path_info_->key().empty());
+  ipc_path_info_->set_protocol_version(IPC_PROTOCOL_VERSION);
+  ipc_path_info_->set_product_version(Version::GetMozcVersion());
+  return true;
+#else
+  LOG(ERROR) << "LoadPathName failed";
+  return false;
+#endif
 }
 
 bool IPCPathManager::GetPathName(string *ipc_name) const {