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Every secured network will have a network security key, but not every network uses the same kind of security. The security key is a kind of network password or the passphrase in the form of physical, digital signature or biometric data password that is used to provide authorization and accessibility to the wireless network or device on which the client requests to connect with. The security key also provisions to establish a secure connection between the requesting client and the serving network or wireless device like routers etc. These protect our network and devices from unwanted access. The security key is of various kinds and is widely used everywhere in our day to day services like online banking, money transactions in the form of OTP’s (one time password), online shopping, accessing the Internet service, login into the mail account or any network device etc.