# Is sending encrypted message and signed message a secure way of transmitting data? [duplicate]

I know that the industrial standard is normally sending data in the following format:

Send Encr(msg, Sign(msg))


Is the following way a secure as well?

Send Enc(msg) and Sig(msg)


By secure, I mean no one will be able to read my message, and no one will be able to tamper my message.

• @cygnusv, I've updated the question to remove the duplication – hexinpeter May 19 '15 at 13:00
• This paper could be relevant to you. – cygnusv May 19 '15 at 14:52
• @cygnusv, thanks very much. The paper helped a lot. – hexinpeter May 21 '15 at 12:07