1 code implementation • 31 Jan 2019 • Alberto Sonnino, Shehar Bano, Mustafa Al-Bassam, George Danezis
We present a family of replay attacks against sharded distributed ledgers, that target cross-shard consensus protocols, such as the recently proposed Chainspace and Omniledger.
Cryptography and Security
1 code implementation • 24 Sep 2018 • Mustafa Al-Bassam, Alberto Sonnino, Vitalik Buterin
Light clients, also known as Simple Payment Verification (SPV) clients, are nodes which only download a small portion of the data in a blockchain, and use indirect means to verify that a given chain is valid.
Cryptography and Security
no code implementations • 12 May 2018 • Alexander Hicks, Vasilios Mavroudis, Mustafa Al-Bassam, Sarah Meiklejohn, Steven J. Murdoch
We propose VAMS, a system that enables transparency for audits of access to data requests without compromising the privacy of parties in the system.
Cryptography and Security
8 code implementations • 20 Feb 2018 • Alberto Sonnino, Mustafa Al-Bassam, Shehar Bano, Sarah Meiklejohn, George Danezis
Coconut is a novel selective disclosure credential scheme supporting distributed threshold issuance, public and private attributes, re-randomization, and multiple unlinkable selective attribute revelations.
Cryptography and Security
no code implementations • 10 Nov 2017 • Shehar Bano, Alberto Sonnino, Mustafa Al-Bassam, Sarah Azouvi, Patrick McCorry, Sarah Meiklejohn, George Danezis
The blockchain initially gained traction in 2008 as the technology underlying bitcoin, but now has been employed in a diverse range of applications and created a global market worth over $150B as of 2017.
Cryptography and Security
