Quantum cryptography can provide security guarantees against adversaries with unlimited computational power, which motivates research towards a quantum internet. However, widely used Poisson-distributed sources limit the maximal security level and communication rate of such quantum networks. This can be overcome by quantum dot single-photon sources. We show that quantum dots provide additional security benefits based on the tunability of number state coherence. We identify the optimal quantum dot setting for the main quantum-cryptographic primitives and benchmark their performance. Our work is extended by results on network-based blind quantum computing with classical clients, which will make secure quantum computing more accessible.
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