IEEE CNS provides a premier forum for security researchers, practitioners, policy makers, and users to exchange ideas, techniques and tools, raise awareness, and share experience related to all practical and theoretical aspects of cybersecurity. Refund requests must be made in writing and sent to the HIV-AIDS 2020 Registration Department, by email, no later than January 25, 2020. The Letter of Invitation will be issued by the conference organizers and should be submitted to the embassy when applying for a visa. The conference committee will be notified by IEEE once an attendee has paid the registration fee. Confirmation letters will not be initiated until notification of payment from IEEE. Note that in the event that you are denied a visa, we will provide you a full refund of the conference registration right up to the start of the conference. We recommend that you secure your travel visa before registering for the conference as cancellations after the preregistration cutoff may result in a cancellation fee. The Organizing Committee will only process the VISA invitation letter after the person who requested it has paid at least 50% of the corresponding registration fee. Visa Letter of Invitation To request a Visa Invitation letter, you need to: Register and pay in full. Once registration is complete and payment has been made, submit a visa letter of invitation request using the red button at the bottom of the page. You will be required to fill out your information as it appears on your passport.