Encryption/Decryption on html file?

[C++ Programming]

Hi all,

i am creating a html file,and write data in html file line by line with different formatting of color and font.

now i want to encrypt this file,now please tell me how can i do this?

what method use for this?

either encrypt the file or encrypt the string that is have to be written on this file.

and on decryption side how can i recover it in normal readable format.

please help me and guide for this.

if possible please explain me with any example.

thanks in advance.