diff --git a/_posts/2016-05-21-python-simple-ciphertext.md b/_posts/2016-05-21-python-simple-ciphertext.md
index fe5a47cb3e8f859b17854d856a7ed4d1a119831e..4d42fd19ac3477db0170153f82b168b40f78a9b7 100644
--- a/_posts/2016-05-21-python-simple-ciphertext.md
+++ b/_posts/2016-05-21-python-simple-ciphertext.md
@@ -5,7 +5,7 @@ date:   2016-05-21 14:32:04 +0700
 categories: [python, security]
 ---
 
-Simply how to make a ciphertext only with 1 line. in this sample, the plaintext is result encoded from hexa.
+Simply how to make a ciphertext only with 1 line. in this sample, the plaintext is result encoded from hexa. and then, just changing all integer `3` to `6` and also otherwise from `6` to `3`.
 
 ```python
 >>> #hex_encode = 'summonagus'.encode('hex')