How do I sign an Abode document with a secure environment?

If this is related to Adobe Fill & Sign (since you did submit this feedback through the Feedback form) this is an FAQ on security: https://www.acrobat.com/en_us/security.html

I am not sure if that really is what you wanted, if that doesn't answer please provide more details.

Thanks,

Josh

PS - You might want to look at Electronic Signature Software, Digital Signatures | Adobe EchoSign to see if that fits your needs

Also Electronic signatures, e-signatures | Adobe Acrobat XI