What do we need for a secure communication channel? Authentication(Who am I talking to? Confidentiality(Is my data hidden?) Integrity(Has my data been modified? Availability(Can I reach the destination?What do we need for a secure communication channel? ◼ Authentication (Who am I talking to?) ◼ Confidentiality (Is my data hidden?) ◼ Integrity (Has my data been modified?) ◼ Availability (Can I reach the destination?)