diff --git a/src/main/scala/backBoard/ebus/Encryptor.scala b/src/main/scala/backBoard/ebus/Encryptor.scala
new file mode 100644
index 0000000..120e397
--- /dev/null
+++ b/src/main/scala/backBoard/ebus/Encryptor.scala
@@ -0,0 +1,33 @@
+package BACK
+
+import chisel3._
+import chisel3.util._
+
+
+class Encryptor_IO_Bundle extends Bundle{
+  val init = Flipped(Valid(UInt(128.W)))
+
+  val op = Decoupled(UInt(8.W))
+}
+
+class Encryptor extends Module{
+  val io: Encryptor_IO_Bundle = IO(new Encryptor_IO_Bundle)
+
+  val encryptReg = Reg(UInt(128.W))
+
+  when( io.init.valid ){
+    encryptReg := io.init.bits
+  } .elsewhen( io.op.fire ){
+    encryptReg := Cat(encryptReg(119,0), io.op.bits)
+  }
+
+  val opValid = RegInit(false.B)
+  when( io.init.fire ){
+    opValid := true.B
+  }
+
+  io.op.valid := opValid
+  io.op.bits  := encryptReg(127, 120)
+
+}
+