diff --git a/Salsa20.md b/Salsa20.md
index 8b15588..9cef992 100644
--- a/Salsa20.md
+++ b/Salsa20.md
@@ -1,10 +1 @@
-Salsa20 is a fast stream cipher.
-
-Use "salsa20-ctr" in shadowsocks.json.
-
-And install these packages:
-
-Debian / Ubuntu:
-
-    apt-get install python-numpy
-    pip install salsa20
\ No newline at end of file
+Moved to [Encryption](https://github.com/clowwindy/shadowsocks/wiki/Encryption).
\ No newline at end of file