Which of the following statements are correct

Quantum key distribution cannot be used to distribute a secret key over a distance greater then 100 km.

The security of QKD is not affected by the level of technology available to an eavesdropper.

Problems with authentication can be solved with the use of a trusted third party in QKD systems.

An eavesdropping attempt on a QKD system will always be. Detected by the communicated parties (and the confidence of its detection is not statistical), unless they are not authenticated.