The key was often a book in which both the sender and receiver could measure equidistant letter sequence markings. One can think of some of the simple book ciphers of the early to mid-millennium where recipients used the pre-shared key to decode messages sent encrypted in the printed pages of a book. The idea is that users utilized an initial secure channel to deliver a key, and then subsequently at a future time, sent secondary transmissions where encryption depended on that initial key. The concept of a pre-shared key goes all the way back to primitive non-digital cryptography in prior centuries. One of the fundamental aspects of WPA-PSK security is the use of a pre-shared key. As a result, some telecom services have moved to using WPA instead of WEP protocol for encryption and authentication. Interestingly, both of these protocols use a pre-shared key, but the encryption on WEP is considered weaker than the encryption on WPA systems. It's important to note that WPA-PSK is one of multiple alternatives for this type of wireless LAN authentication and validation.Īnother one is called Wired Equivalent Protection (WEP). Unlike commercial WPA systems, the WPA-PSK method doesn't require a central server or various kinds of user-driven inputs. WPA-PSK can be used with the AES standard, which is a common standard in cybersecurity analysis. With a TKIP protocol, WPA-PSK uses 128-bit encryption.

With WPA-PSK protocol, data transmission is encrypted and controlled using an end user’s generated password. Techopedia Explains Wi-Fi Protected Access Pre-Shared Key (WPA-PSK)

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