Security proofs for hash tree time-stamping using hash functions with small output sizeBuldas, Ahto; Laanoja, RistoInformation security and privacy : 18th Australasian Conference, ACISP 2013, Brisbane, Australia, July 1-3, 2013 : proceedings2013 / p. 235-250 : ill https://doi.org/10.1007/978-3-642-39059-3_16 Conference Proceedings at Scopus Article at Scopus