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BEGIN:VEVENT
SUMMARY:Shortcutting the Bitcoin verification process for your smartphone
DTSTART:20181101T101500
DTSTAMP:20260502T121409Z
UID:236852cdba3418c72af8a8b1cf4a6301f4b7fd3ce60c8b4aa09c54a2
CATEGORIES:Conferences - Seminars
DESCRIPTION:Pierre-Louis Roman\, University of Rennes\, France\nAbstract\n
 Blockchains have a storage scalability issue: their size is unbounded and 
 their growth endless. The size of the Bitcoin blockchain increased from 12
 5 GiB in August 2017 to 175 GiB in August 2018\, taking a record 50 GiB in
  just a year. To fully benefit from the security model of Bitcoin\, a boot
 strapping node has to download and verify the entirety of the 175 GiB. Low
 -resource devices such as smartphones can choose the less costly model of 
 partial block verification where only 40 MiB of block headers must be down
 loaded and verified. However\, such a drastic decrease in resource consump
 tion comes with a security drawback: these nodes only verify the difficult
 y of blocks without verifying their correctness.\n \nIn this talk\, I wil
 l present Dietcoin and its diet nodes that can verify the correctness of b
 locks without having to pay the onerous price of a full chain download and
  verification. Diet nodes can build upon the trust they have in a block to
  verify the next one and are thus able to verify entire subchains. Blocks 
 can be verified for a few additional MiB of bandwidth on top of the base 4
 0 MiB needed for block headers. I will then present the evaluation scheme 
 of Dietcoin where historical data from the Bitcoin blockchain is replayed 
 to a diet node running on a smartphone. This scheme can be adapted to othe
 r Bitcoin improvement proposals to test their claims on a real dataset in 
 a realistic environment powered by the de facto standard bitcoin library.\
 n \nBiography\nPierre-Louis Roman is a soon-to-graduate PhD student at th
 e University of Rennes. He works on decentralized systems and more specifi
 cally on blockchains\, epidemic protocols and weak consistency models. He 
 is a self-proclaimed authority on banana-splits and enjoys having a concis
 e bio.\n 
LOCATION:BC 420 https://plan.epfl.ch/?room==BC%20420
STATUS:CONFIRMED
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