8642: 538–557. {{cite journal}}: Cite journal requires |journal= (help) ↑ Ren, Ling; Srinivas, Devadas (2016). "Proof of Space from Stacked Expanders" (PDF). {{cite journal}}: Cite journal requires |journal= (help) ↑ "Proof of capacity (PoC)". ↑ Moran, Tal; Orlov, Ilan (2019). "Simple Proofs of Spacetime and Rational Proofs of Storage" (PDF). ↑ Jakobsson, Markus; Stewart, Guy (2013).