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International journal of theoretical physics, 2019-06, Vol.58 (6), p.1861-1873
Ort / Verlag
New York: Springer US
Erscheinungsjahr
2019
Link zum Volltext
Quelle
SpringerLink Journals
Beschreibungen/Notizen
Higher security and lower collision rate have always been people’s pursuits in the construction of hash functions. We consider a quantum walk where a walker is driven by two coins alternately. At each step, a message bit decides whether to swap two coins. In this way, a keyed hash function is constructed. Theoretically infinite possibilities of the initial parameters as the key ensure the security of the proposed hash function against the unforgery and collision resistance. Finally, we establish a generic quantum walk-based hash function model and give a guide in constructing hash functions in quantum walk architecture. It also provides a clue for the construction of other quantum walk-based cryptography protocols.