Rename security handshaker files.
diff --git a/build.yaml b/build.yaml
index 52c2cae..dbc4cf8 100644
--- a/build.yaml
+++ b/build.yaml
@@ -495,9 +495,9 @@
   - src/core/lib/security/credentials/plugin/plugin_credentials.h
   - src/core/lib/security/credentials/ssl/ssl_credentials.h
   - src/core/lib/security/transport/auth_filters.h
-  - src/core/lib/security/transport/handshake.h
   - src/core/lib/security/transport/secure_endpoint.h
   - src/core/lib/security/transport/security_connector.h
+  - src/core/lib/security/transport/security_handshaker.h
   - src/core/lib/security/transport/tsi_error.h
   - src/core/lib/security/util/b64.h
   - src/core/lib/security/util/json_util.h
@@ -518,9 +518,9 @@
   - src/core/lib/security/credentials/plugin/plugin_credentials.c
   - src/core/lib/security/credentials/ssl/ssl_credentials.c
   - src/core/lib/security/transport/client_auth_filter.c
-  - src/core/lib/security/transport/handshake.c
   - src/core/lib/security/transport/secure_endpoint.c
   - src/core/lib/security/transport/security_connector.c
+  - src/core/lib/security/transport/security_handshaker.c
   - src/core/lib/security/transport/server_auth_filter.c
   - src/core/lib/security/transport/tsi_error.c
   - src/core/lib/security/util/b64.c