DES Encryption and Decryption . how to find the encrypted msg has been changed

I am Using DES Encryption and Decryption.
I want to know whether the data is modified or not..Currently when i changed the encrypted data . it is giving different data .but how could i find that the data is modified.. is there any option...

I'm not sure I understand what you're trying to do. Different cleartexts lead to different cryptotexts. If you want to compare the current cryptotext, then you need to store previous cryptotexts (or at least the most recent one); you may also want to store when it was last changed.