Shared Key Authentication (SKA) is a verification process by which a computer can gain access to a wireless network that uses the Wired Equivalent Privacy (WEP) protocol. With SKA, a computer equipped with a wireless modem can fully access any WEP network and exchange encrypted or unencrypted data.
Based on a shared secret key, this kind of authentication enables a modem to preestablish that the requesting system already knows about the shared secret key needed for authentication. The IEEE 802.11 wireless standard assumes that the key will be delivered to a wireless client through a secure channel that's independent of the standard. It enables users to type in a password and immediately gain access to a Wi-Fi network.
A WEP encryption key, obtained in advance by the connecting computer, must match a key stored at the wireless access point (AP) for SKA to work.
Here are steps in the SKA process:
A wireless-equipped computer can connect to a WEP network AP without shared keys using the Open System Authentication (OSA) process. Still, this method does not enable the computer to receive encrypted data.
SKA is not considered a secure approach to providing network access. This is attributed to the use of conventional unsecured channels to share security keys required for access. However, the authentication process is secured using 64- or 128-bit encryption. This means threat actors cannot gain access without any knowledge about the key.
WEP, Wi-Fi Protected Access (WPA), and WPA2 Wi-Fi encryption use the Pre-Shared Key (PSK) authentication method. When it comes to WPA, this approach is known as WPA-PSK or WPA2-PSK. When used in Extensible Authentication Protocol, it's called EAP-PSK. Both the clients and wireless AP share the same secret key in all these use cases. This approach to client authentication usually uses a passphrase with eight to 63 American Standard Code for Information Interchange, or ASCII, characters or 64 hexadecimal digits.
Almost all organizations use Secure Shell (SSH) in their data centers to manage operating systems, configurations and networks. SSH keys are also present in many configuration management tools.
Without SSH, modern cloud computing would not be a reality because SSH makes possible the automation needed for these services. It also makes such services more cost-effective.
SSH keys function like passwords for authentication purposes and control who gets access to what.
You can use SKA in Azure to authorize any requests made against a storage service. For example, SKA can authorize requests against services such as Blob Storage, Queue Storage and Files.
OSA lets any user authenticate to the AP and do so without any encryption. This means OSA enables authentication without performing any client verification and only exchanges "hellos" between the AP and client. It's a null authentication. In contrast, SKA only allows wireless clients with a shared key to connect, often with WEP encryption. However, you can use the simple OSA protocol together with more advanced network security authentication approaches, like EAP and PSK authentication.
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25 Feb 2022