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UID:pretalx-protocol-berg-v2-BDJX8M@cfp.protocol.berlin
DTSTART;TZID=CET:20250613T110000
DTEND;TZID=CET:20250613T112000
DESCRIPTION:Decentralized storage systems face a fundamental trade-off betw
 een\nreplication overhead\, recovery efficiency\, and security guarantees.
 \nCurrent approaches either rely on full replication\, incurring sub-\nsta
 ntial storage costs\, or employ trivial erasure coding schemes\nthat strug
 gle with efficient recovery especially under high storage-\nnode churn. We
  present Walrus\, a novel decentralized blob storage\nsystem that addresse
 s these limitations through multiple technical\ninnovations.\n\nAt the cor
 e of Walrus is Red Stuff\, a two-dimensional erasure\ncoding protocol that
  achieves high security with only 4.5x repli-\ncation factor\, while enabl
 ing self-healing recovery that requires\nbandwidth proportional to only th
 e lost data (𝑂 (|𝑏𝑙𝑜𝑏|/𝑛) versus\n𝑂 (|𝑏𝑙𝑜
 𝑏|) in traditional systems). Crucially\, Red Stuff is the first\nprotoc
 ol to support storage challenges in asynchronous networks\,\npreventing ad
 versaries from exploiting network delays to pass ver-\nification without a
 ctually storing data.\n\nWalrus also introduces a novel multi-stage epoch 
 change proto-\ncol that efficiently handles storage node churn while maint
 aining\nuninterrupted availability during committee transitions. Our sys-\
 ntem incorporates authenticated data structures to defend against\nmalicio
 us clients and ensures data consistency throughout stor-\nage and retrieva
 l processes.
DTSTAMP:20261011T053754Z
LOCATION:Cinema 6
SUMMARY:Walrus: An Efficient Decentralized Storage Network - Lefteris Kokor
 is Kogias
URL:https://cfp.protocol.berlin/protocol-berg-v2/talk/BDJX8M/
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