The shared secret is the key the Firebox and the authentication server use to secure the authentication information that passes between them. The shared secret is case-sensitive and must be the same on the Firebox and the authentication server. RADIUS, SecurID, and VASCO authentication servers all use a shared key. Authentication Keys
Encrypt Pre-shared Keys in Cisco IOS Router Configuration The pre-shared key to be encrypted can be configured either as standard, under an ISAKMP key ring, in aggressive mode, or as the group password under an EzVPN server or client setup. This sample configuration details how to set up encryption of both existing and new pre-shared keys. VPN authentication - IPSec tutorial guide, pre shared keys Pre-shared key is authenticating using a key, although this is not a scalable option in large networks. A digital Certificate is a scalable option and would have to be purchased from a CA (Certification Authority) such as Verisign, GoDaddy and others. Another option for VPN authentication is with the use of Xauth (extended authentication) where
Jun 15, 2017
Jan 18, 2018 Key Authentication - an overview | ScienceDirect Topics
With Pre-Shared-Key authentication both the client (supplicant) and access point (authenticator, also known as ‘AP’) each attempt to prove that they know the PSK without actually disclosing this information. This process is called the 4-way handshake.
Accessing M-Files Vaults without VPN The security of this approach is based on encrypting all network traffic between client devices and the server with HTTPS (SSL/TLS) and on using a pre-shared key as an additional "shared secret" in authentication to ensure that only authorized devices can attempt to connect to the system. IKEv2 Deployments > Pre-shared-key Authentication with Pre-shared-key Authentication with Smart Defaults. This configuration is the simplest to set up. By using smart defaults, a VPN is created between two peers using minimal configuration: only the IKEv2 profile and corresponding IKEv2 keyring are required. Figure 7-1 illustrates the topology. The transport network is using IPv6, and the overlay Connectivity: VPN Pre-Shared Key with Static IP