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1. Run the YubiKey Manager application and insert your key
   
   
2. Click on Applications and then click on PIV
   
   
   

3. Change PIN if YubiKey is fresh out of the box or it's been defaulted

   Note
   skip to (II. Determine Which Certificate to Use) if YubiKey is already initialized

   1. Click on Configure PINs
      
      

   2. 
      

      Note
      The PIN used to unlock and utilize the certificates on the YubiKey. You will have 3 tries to input the correct PIN.

      Click Change PIN and then check Use default (if it is default).
      Choose a PIN between 6 - 8 characters.
      Finish with changing PIN by clicking on Change PIN
      

      
      

   3. 
      

      Note
      The PUK is used to unblock the PIN if it becomes locked. You will have 3 tries to unblock the PIN.

      Click on Change PUK and then check Use default (if it is default).
      Choose a PUK between 6 - 8 characters.
      Finish with changing PUK by clicking on Change PUK
      

      
      
      

   4. 
      

      Note
      The Management Key is utilized for all PIV operations on the YubiKey. This will be needed when generating new certificates. This will be needed in the next section. You should store this in a secure repository.

      
      

      Warning
      The Management Key is needed in creating a certificate. You need to store this in a secure repository.

      
      Click on Change Management Key and then check Use default (if it is default).
      Click on Generate a few times to randomly create a new management key.
      Choose AES256 as Algorithm.
      Finish with changing the key by clicking on Finish