# PSK Authentication

# PSK certification

If you want to use PSK authentication, you need to comment out listener.ssl.external.ciphers in TLS authentication, and then configure listener.ssl.external.psk_ciphers:

#listener.ssl.external.ciphers = ECDHE-ECDSA-AES256-GCM-SHA384,...
listener.ssl.external.psk_ciphers = PSK-AES128-CBC-SHA,PSK-AES256-CBC-SHA,PSK-3DES-EDE-CBC-SHA,PSK-RC4-SHA

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# Create module

Open EMQ X Dashboard (opens new window), click the "Modules" tab on the left, and choose to add:

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Choose PSK certification

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Configure related parameters

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After clicking add, the module is added

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The PSK configuration file is psk.txt, use a colon : to separate PSK ID and PSK:

client1:1234
client2:abcd
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