Hi Nitin,
Thanks for your response.
But the blog you are referring to is for SOAP adapter and it encrypt complete Payload. In My case I have to use SFTP Adapter in Sender channel and need to decrypt only one field of the payload.
I have also refereed to your blog, which is to sign the data. I tried modifying it for encryption and decryption, but couldn't succeeded.
Regards
Vj