VPN Authentication 1 Competitive advantages 1 Cryptography 1 Descriptive methods 1 Elliptic Curve Cryptography(ECC) 1 Empirical methods 1 Entropy 1 Interpretive methods 1 Man in the middle attacks 1 Management information system 1 Mathematical algorithms 1 PKI 1 Public key cryptography 1 Public-key infrastructure 1 SeDIC 1 Security measure 1 Virtual Private Network 1 Virtual private networks 1