DOCSLIB.ORG

Keybase Architecture

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Keybase Architecture SED 572 Transcript EPISODE 572 [INTRODUCTION] [0:00:00.3] JM: Keybase is a platform for managing public key infrastructure. Keybase’s products simplify the complicated process of associating your identity with a public key. Keybase is the subject of the first half of today's show. Michael Maxim an engineer from Keybase gives an overview for how the technology works and what kinds of applications Keybase unlocks. The second half of today's show is about Clarifai. Clarifai is an AI platform that provides image recognition APIs as a service. Habib Talavatifard explains how Clarifie’s infrastructure processes requests and the opportunities for improving the efficiency of that infrastructure. Last month, we had three Software Engineering Daily meetups in New York, Boston and Los Angeles. At each of these meetups, listeners from the SE Daily community got to meet each other and talk about software, what they're building and what they're excited about. I was happy to be in attendance at each of these and I'm posting the talks given by our presenters. The audio quality is not perfect on these, but it's not terrible and there's also no ads. Thank you to data dog for being a gracious sponsor for providing this space for our meetup and also for sponsoring the podcast. You can sign up for data dog and get a free t-shirt by going to softwareengineeringdaily.com/datadog. We'd love to have you as part of our community. We will have more meetups eventually and you can be notified of these meetups by signing up for our newsletter. You can also come to softwaredaily.com and get involved with the discussion of episodes and software projects, and you can check out our open source projects, the mobile apps and our website. You can find all of that at software.daily.com. With that let's get to these weekend episodes about our meet-up presenters. [INTERVIEW] © 2018 Software Engineering Daily !1 SED 572 Transcript [0:02:05.9] JM: Thanks for coming to the meetup. I'm really excited to have Mike Maxim and Habib Talavatifard to speak from Keybase and Clarifai respectively. Before we get started, we're going to hear from Datadog who's the sponsor, the host who has generously provided the food and beverage for everybody. Yeah, Ilan, take it away. [0:02:27.8] IR: Thanks everybody for joining us here at Datadog today. Just a quick show of hands, how many folks are using Datadog at work right now? If you work at Datadog, you don't count, because –I mean, you do count. Yeah, so Datadog is a monitoring platform for all your infrastructure and applications, everything from logs to metric logs, to metrics, to tracing. We'd love to help you monitor your infrastructure. We also love to have you join our team. We're here in New York, as well as in Boston, in Paris and are pretty remote-friendly and we're hiring for everything from SREs, to software devs, to everything else you may be able to imagine. Our website is full of jobs. If you're here during the breaks and you want to learn a little bit more about opportunities here at Datadog, love to chat with you. Jeremy Dan, raise your hands. Other Datadog people raise your hands. You can find any one of us and chat with us about opportunities here, everything from again, from hacking on back in analytics systems and with Redshift and Looker and Spark and Kafka and everything else in between, to SRE and stability and everything, and other topics as well. Another thing I wanted to mention is if you look on your seats, most of you seem to have sat on them. There are little scratch off cards. They are actually worth something, so you might want to grab one. Datadog’s running our user conference at the end of the – over the summer, July 11th and 12th is an event called Dash, and each of you have a little scratcher ticket on your seats with an opportunity to win a free pass, or discount and passes to Dash. Be a great opportunity to get hands-on workshops on everything from containerization and observability, to seminars from your peers on how they're scaling their systems and their infrastructure, like some of the topics we're going to hear about today. Without further ado, I'll hand – I don’t know if I’m handing to Jeff or I’m handing off to Mike, but back to you all. Thanks. © 2018 Software Engineering Daily !2 SED 572 Transcript [0:04:09.9] JM: Thank you, Ilan. I think there are some people here who don't really know what Software Engineering Daily is, which is totally fine. Just to fill you in, if you haven't heard of Software Engineering Daily, it's a podcast about software engineering. It's five days a week and the format is fairly technical software engineering content. If you are a listener to the show then hopefully I've had a chance to say hi and shake your hand and meet you. If not, I'd love to meet up, talk a little bit, or grab 30 minutes after the presentations hopefully, a chat for a little bit. As always you can send me an e-mail, or Slack message or whatever. Yeah, we'll get the ball rolling. The schedule is on the meetup page if you don't know what the schedule is. We'll start with Mike Maxim who is – just to give him a quick introduction. He's been the CTO and the CEO of OkCupid before he joined Keybase, which was started by the founders of OkCupid and Keybase is a pretty incredible company. I think we're going to be hearing a lot more about Keybase in the future, so I would pay attention closely. [0:05:15.4] MM: Thank you, Jeff and thanks for Datadog for having us, having a Keybase here to give you guys some more information about it. Before I get started, just a quick show of hands, how many people have heard of Keybase, or have used Keybase? All right, some people. How many people know what public key cryptography is? More people. All right, great, good. We won't be starting from scratch here. Keybase, crypto for everyone. Keybase was started in 2015 and the stated mission is to bring public key crypto tools to everyone. The space has traditionally been very complicated, very hard to use and has never really caught on other than SSL or TLS with larger groups of people. The tools have been traditionally hard to use and hard to really coordinate and get people into. The goal of Keybase is just to change all that, provide an infrastructure to make public key crypto accessible to people and to provide apps on top of that that allow you to integrate crypto into your day-to-day workflow on your computer, either through chat, file system, or with Git for programmers, that thing. © 2018 Software Engineering Daily !3 SED 572 Transcript Tis talk, we're going to talk a little bit about crypto. I know people have indicated know this, but we'll just do a quick refresher and talk about how Keybase fits into that scene, talk about how Keybase can run on devices and then these apps that I was just mentioning that take advantage of all this infrastructure that Keybase provides. These slides are public at that address. Cool, so why is crypto important? This little slide here shows all the services people use. People use a lot of these cloud services these days, anything from Dropbox, Twitter, Facebook, Slack, Google Drive, all kind of stuff. You're communicating through the cloud and you store your files there. Traditionally all the stuff is out in the open. Once it hits people servers, Slack almost certainly can read all of your e-mail, or all of your stuff, Dropbox can as well. It's fine for a lot of people, but it'd be nice if there is a way to have these cloud services, but not have to make that sacrifice and personal privacy, or to be attacked. The traditional crypto setup that these little crypto exercises, we have the actors as being Alice and Bob; these are two very famous Alice and Bob people. Then Malory is traditionally your adversary in these things. The goal of crypto is to be able to do all these fun things that you can do without having to give up your privacy, or be attacked by a third party. What does Keybase do? Keybase is a set of tools, like I said that solves this Malory problem here. Our goal is to create a set of usable tools that allow you to do all these things that you're used to doing; chat, share files, collaborate and host your content in a secure way. Here on the bottom is, well I don't know if you can really see this that well, but these are the four main things that we have in the Keybase app. The key aspects of true encrypted communication is you want to be able to – Alice wants to be able to communicate with Bob under the following circumstance. You have an adversary called Malory listening in. Malory can possibly tamper with whatever is there, Malory can impersonate other people in this chat, controls the servers, so all this stuff is possible.
Load more

Recommended publications
  • Building Resilience & Confronting Risk In
    BUILDING RESILIENCE & CONFRONTING RISK IN THE COVID-19 ERA A PARENTS & CAREGIVERS GUIDE TO ONLINE RADICALIZATION POLARIZATION AND EXTREMISM RESEARCH AND INNOVATION LAB (PERIL) PERIL brings the resources and expertise of the university sector to bear CONTENTS on the problem of growing youth polarization and extremist radicalization, through scalable research, intervention, and public education ideas to PARENT & CAREGIVER GUIDE 3 reduce rising polarization and hate. WHAT IS ONLINE RADICALIZATION? WHY SHOULD YOU CARE? 4 SOUTHERN POVERTY LAW CENTER NEW RISKS IN THE COVID-19 ERA 5 The SPLC seeks to be a catalyst for racial justice in the South and RECOGNIZING WARNING SIGNS 6 beyond, working in partnership with communities to dismantle white UNDERSTANDING THE DRIVERS 7 supremacy, strengthen intersectional movements, and advance the ENGAGE AND EMPOWER 9 human rights of all people. RESPONDING TO HATE 11 HOW TO GET HELP 12 APPENDIX: STAYING ALERT TO SITES, PLATFORMS AND APPS FREQUENTLY EXPLOITED BY EXTREMISTS 17 ENDNOTES 19 CREDITS 20 ILLUSTRATIONS BY CLAUDIA WHITAKER PARENT & CAREGIVER GUIDE Who is this guide for? We wrote this guide with a wide Whether you live with a young person, or work virtually range of caregivers in mind. with youth, radicalization to extremism is something we all should be concerned about. Extremists looking Caregivers living with children and young adults. This to recruit and convert children are predatory. Like all includes parents, grandparents, foster parents, extended forms of child exploitation, extremist recruitment drives families, and residential counselors who are the a wedge between young people and the adults they would guardians and caregivers of children and youth living typically trust.
    [Show full text]
  • 2.3 Blockchain
    POLITECNICO DI TORINO Corso di Laurea Magistrale in Ingegneria Informatica - Data Science Tesi di Laurea Magistrale Supporting the portability of profiles using the blockchain in the Mastodon social network Relatore Candidato prof. Giovanni Squillero Alessandra Rossaro Anno Accademico 2018-2019 École polytechnique de Louvain Supporting the portability of profiles using the blockchain in the Mastodon social network Authors: Alessandra ROSSARO, Corentin SURQUIN Supervisors: Etienne RIVIERE, Ramin SADRE Readers: Lionel DRICOT, Axel LEGAY, Giovanni SQUILLERO Academic year 2018–2019 Master [120] in Computer Science Acknowledgements We would like to thank anyone who made the writing of this thesis possible, directly or indirectly. First of all, we would like to thank our supervisors, Prof. Etienne Riviere and Prof. Ramin Sadre for their continous support and advice during the year. We would never have gone this far without them. Secondly, we thank Lionel Dricot, Prof. Axel Legay and Prof. Giovanni Squillero for accepting to be the readers of this thesis. Alessandra First of all, I would like to thank my family, my parents Claudia and Alberto, my brother Stefano and my sister Eleonora, that from the beginning of my studies believed in me, every time urging me to give more and sustaining me each time that I had difficulties. They are my strength and I feel really lucky to have them in my life. Another thanks is to my friends, to Soraya, Beatrice, Sinto and Stefano and especially to Matteo and Edoardo that each time that I needed, remember me to believe in myself and don’t give up. Thank you, sincerely! I would like to thank also my partner, Corentin, because we were a great team, sometimes with some misunderstandings, but I appreciated to work at this project with him! Corentin I must express my deep gratitude to my family and friends for their moral support.
    [Show full text]
  • Download Criminal Complaint Filed in the Eastern District of California
    AO 91 (Rev. 11/11) Criminal Complaint UNITED STATES DISTRICT COURT for the Eastern District of California United States of America ) V. ) MARCOS PAULO DE OLIVEIRA­ ) Case No. ANNIBALE, ) aka "Med3lin," ) aka "Med3lln," ) aka "Med3lln WSM" ) Defendant(s) CRIMINAL COMPLAINT I, the complainant in this case, state that the following is true to the best of my knowledge and belief. On or about the date( s) of October 2017 through April 2019__ in the county of Sacramento in the Eastern District of California , and elsewhere, the defendant(s) violated: Code Section Offense Description 21 U.S.C. §§ 841 and 846 Distribution and Conspiracy to Distribute Controlled Substances 18 U.S.C. §§ 1956 and 1957 Money Laundering This criminal complaint is based on these facts: (see attachment) IX! Continued on the attached sheet. -j- ;1 ·) / , / l 1 - • / L ',;;;_ . _/__I-- / Complainant's signature JAY D. DIAL, Jr., Special Agent Dl'llg Enforcem~_11t Ad111inistration Printed name and title Sworn to before me and signed in my presence. ;]t "-" ' Date: l.2 _/,_ I ---=- (.___ ,,--- "'-~ Judge 's signature City and state: Sacramento, CA Allls__on Claire, U_.§~ Magi~trate__.J__udge Printed name and title AO 91 (Rev. 11/11) Criminal Complaint UNITED STATES DISTRICT COURT for the Eastern District of California United States of America ) V. ) MARCOS PAULO DE OLIVEIRA­ ) Case No. ANNIBALE, ) aka "Med3lin," ) aka "Med3l1n," ) aka "Med3lln_WSM" ) Defendant(s) CRIMINAL COMPLAINT I, the complainant in this case, state that the following is true to the best of my knowledge and belief. On or about the date(s) of ~tober 20 I 7 through April 2019_ in the county of .
    [Show full text]
  • On the Security of Electroneum Cloud Mining
    This Selfie Does Not Exist: On the Security of Electroneum Cloud Mining Alexander Marsalek1, Edona Fasllija2 and Dominik Ziegler3 1Secure Information Technology Center Austria, Vienna, Austria 2Institute for Applied Information Processing and Communications (IAIK), Graz University of Technology, Graz, Austria 3Know-Center GmbH, Graz, Austria Keywords: Electroneum Cloud Mining, Cryptocurrency, Impersonation Attack, Image Manipulation. Abstract: The Electroneum cryptocurrency provides a novel mining experience called “cloud mining”, which enables iOS and Android users to regularly earn cryptocurrency tokens by simply interacting with the Electroneum app. Besides other security countermeasures against automated attacks, Electroneum requires the user to up- load selfies with a predefined gesture or a drawing of a symbol as a prerequisite for the activation of the mining process. In this paper, we show how a malicious user can circumvent all of these security features and thus create and maintain an arbitrary number of fake accounts. Our impersonation attack particularly focuses on creating non-existing selfies by relying on Generative Adversarial Network (GAN) techniques during account initialization. Furthermore, we employ reverse engineering to develop a bot that simulates the genuine Elec- troneum app and is capable of operating an arbitrary number of illegitimate accounts on one Android device, enabling the malicious user to obtain an unfairly large payout. 1 INTRODUCTION Rivet, 2019). Due to these effects, both Google and Apple prohibit cryptocurrency mining apps from their During 2017, the first and most popular cryptocurrency, application stores (Apple, 2019; Google, 2018), limiting Bitcoin, experienced an astonishing 13-fold increase in the accessibility of the average smartphone users to crypto mining. Despite this fact, several projects like value (Corcoran, 2017).
    [Show full text]
  • Building Resilience & Confronting Risk
    BUILDING RESILIENCE & CONFRONTING RISK A PARENTS & CAREGIVERS GUIDE TO ONLINE RADICALIZATION POLARIZATION AND EXTREMISM RESEARCH AND INNOVATION LAB (PERIL) PERIL brings the resources and expertise of the university sector to bear on the problem of growing youth polarization and extremist radicalization, through scalable research, intervention, and public education ideas to reduce rising polarization and hate. SOUTHERN POVERTY LAW CENTER The SPLC seeks to be a catalyst for racial justice in the South and beyond, working in partnership with communities to dismantle white supremacy, strengthen intersectional movements, and advance the human rights of all people. CONTENTS PARENTS & CAREGIVERS GUIDE 3 WHAT IS ONLINE RADICALIZATION? WHY SHOULD YOU CARE? 4 RECOGNIZING WARNING SIGNS 5 UNDERSTANDING THE DRIVERS 6 ENGAGE & EMPOWER 8 RESPONDING TO HATE 10 HOW TO GET HELP 11 APPENDIX: STAYING ALERT TO SITES, PLATFORMS, & APPS FREQUENTLY EXPLOITED BY EXTREMISTS 15 ENDNOTES 16 CREDITS 17 ILLUSTRATIONS BY CLAUDIA WHITAKER Whether you live with a young person, or now work virtually with youth, radicalization to extremism is something we all should be concerned about. Extremists looking to recruit and convert children are predatory. Like all forms of child exploitation, extremist recruitment drives a wedge between young people and the adults they would typically trust. Radicalization is a problem for our entire society, from the innocent people it victimizes to the family bonds it breaks apart. 2 A PARENTS AND CAREGIVERS GUIDE TO ONLINE RADICALIZATION PARENTS & CAREGIVERS GUIDE Who is this guide for? We wrote this guide with a wide range Whether you live with a young person or work with youth of caregivers in mind.
    [Show full text]
  • Faculty of Health Disciplines Professional Development Workshop Stephen Downes for Athabasca University, Edmonton, Alberta, September 25, 2019
    Faculty of Health Disciplines Professional Development Workshop Stephen Downes For Athabasca University, Edmonton, Alberta, September 25, 2019 Agenda The Learning Context ● Beginning to a.m. break - "wider trends in pedagogy and curriculum, including new critical literacies" - this will situate us firmly in a learning context, and also allow me to introduce a 'critical literacies' tool they can use for reflection through the day Data and Cloud ● Content: developing an understanding of dynamic and fluid data networks, how to access open data, and how to work with data in cloud-based resources. ● Hands-on activities: access to and use of open data; exploration of a cloud environment. Graph and Resources ● Content: new types of graph-based resources, including distributed knowledge networks. ● Hands-on activities: experience developing graphs, use of distributed resources such as Jupyter Notebooks. Identity and Recognition ● Content: how we know who someone is, how we project ourselves on the internet, and how we can be safe and secure; how we know what someone has learned. ● Hands-on activities: creation of 'identity graphs', creation of public and private keys, and creation of digital credentials Experience, Community and Agency ● Content: how to enable learning experiences based on hands-on practice and knowledge creation sufficient to support a rapidly evolving sense of community based on information exchange and consensus. Actionable Practices ● Community network development and management, and ● Personal learning management and support The Learning Context Knowledge as Recognition From a connectivist perspective, knowledge is the organization of connections between a set of entities, where the result of that organization is the capacity to recognize objects or states of ​ ​ affairs in the world.
    [Show full text]
  • Privacy, Security & Anonimity
    Privacy, security & anonimity Foo-Manroot Foo-Manroot https://foo-manroot.github.io/ Foo_Manroot The need of security on Information Systems ● CIA: – Confidentiality – Integrity Defined on ISO 27000 – Availability ● Surveillance programs: – PRISM (U.S.A): revealed by E. Snowden in 2013. – Data Retention Directive (E.U.): The telecommunications data has to be stored for 6 to 24 months to be accessed by the police and security agencies (declared invalid on 2014) – Facebook, Google, Microsoft, Apple… all follow the U.S.A. laws (at least, when it suits them → PRISM vs San Bernardino). ● Enterprises sell and buy personal information: – On ToS there are usually clauses where the enterpirse is granted permission to share data with third parties to “provide an optimal experience” ● Common criminals: – Phising, malware… – Easy attacks. Greater threat than state agents ToS de Facebook There’s no perfect security, but the risk can be minimized. Security policies can’t be applied with retroactive effect → After a breah, there’s little than can be done Some previous definitions ● Software – Free Software (as in ‘freedom’) ● VPN ● Privacy ≠ anonimity ● Encryption – OpenPGP standard Personal security Good practices ● The objective is to minimize the exposition surface. ● Keep software up to date. ● Use HTTPS: – Available on ~41% of web pages – Guarantees confidentiality (even though the ISP can still see the traffic’s destination), integrity and authenticity – It’s important to check the certificate (very easy) ● Full disk encryption: – Easy and transparent
    [Show full text]
  • OSINT Handbook September 2020
    OPEN SOURCE INTELLIGENCE TOOLS AND RESOURCES HANDBOOK 2020 OPEN SOURCE INTELLIGENCE TOOLS AND RESOURCES HANDBOOK 2020 Aleksandra Bielska Noa Rebecca Kurz, Yves Baumgartner, Vytenis Benetis 2 Foreword I am delighted to share with you the 2020 edition of the OSINT Tools and Resources Handbook. Once again, the Handbook has been revised and updated to reflect the evolution of this discipline, and the many strategic, operational and technical challenges OSINT practitioners have to grapple with. Given the speed of change on the web, some might question the wisdom of pulling together such a resource. What’s wrong with the Top 10 tools, or the Top 100? There are only so many resources one can bookmark after all. Such arguments are not without merit. My fear, however, is that they are also shortsighted. I offer four reasons why. To begin, a shortlist betrays the widening spectrum of OSINT practice. Whereas OSINT was once the preserve of analysts working in national security, it now embraces a growing class of professionals in fields as diverse as journalism, cybersecurity, investment research, crisis management and human rights. A limited toolkit can never satisfy all of these constituencies. Second, a good OSINT practitioner is someone who is comfortable working with different tools, sources and collection strategies. The temptation toward narrow specialisation in OSINT is one that has to be resisted. Why? Because no research task is ever as tidy as the customer’s requirements are likely to suggest. Third, is the inevitable realisation that good tool awareness is equivalent to good source awareness. Indeed, the right tool can determine whether you harvest the right information.
    [Show full text]
  • Dark Corners of the Internet a Survey of Tor Research [Archive.Org]
    The Hitchhiker’s Guide to Online Anonymity (Or “How I learned to start worrying and love privacy anonymity”) Version 1.0.4, September 2021 by AnonymousPlanet. This guide is still a work in progress. While I am working constantly to correct issues, improve the content, general structure, and readability, it will probably never be “finished”. Some parts might lack information or contain inaccuracies. Your experience may vary. Remember to check regularly for an updated version of this guide. This guide is a non-profit open-source initiative, licensed under Creative Commons Attribution-NonCommercial 4.0 International (cc-by-nc-4.0 [Archive.org]). See the license at the end of the document. • For mirrors see Appendix A6: Mirrors • For help in comparing versions see Appendix A7: Comparing versions Feel free to submit issues using GitHub Issues at: https://github.com/AnonymousPlanet/thgtoa/issues Feel free to come to discuss ideas at: • GitHub Discussions: https://github.com/AnonymousPlanet/thgtoa/discussions • Matrix/Element: ```#anonymity:matrix.org``` https://matrix.to/#/#anonymity:matrix.org Follow me on: • Twitter at https://twitter.com/AnonyPla [Nitter] (cannot guarantee this account will stay up for long tho) • Mastodon at https://mastodon.social/@anonypla. To contact me, see the updated information on the website or send an e-mail to [email protected] Please consider donating if you enjoy the project and want to support the hosting fees (for the Tor hosting and the Tor Exit node). There are several ways you could read this guide: • You want to understand the current state of online privacy and anonymity not necessarily get too technical about it: Just read the Introduction, Requirements, Understanding some basics of how some information can lead back to you and how to mitigate those, and A final editorial note sections.
    [Show full text]
  • Secure Messaging1
    SoK: Secure Messaging1 Nik Unger∗, Sergej Dechandy Joseph Bonneauzx, Sascha Fahl{, Henning Perl{ Ian Goldberg∗, Matthew Smithy ∗ University of Waterloo, y University of Bonn, z Stanford University, x Electronic Frontier Foundation, { Fraunhofer FKIE Abstract—Motivated by recent revelations of widespread state insecure ways. However, as will become clear over the course surveillance of personal communication, many solutions now of this paper, the academic research community is also failing claim to offer secure and private messaging. This includes both a to learn some lessons from tools in the wild. large number of new projects and many widely adopted tools that have added security features. The intense pressure in the past two Furthermore, there is a lack of coherent vision for the future years to deliver solutions quickly has resulted in varying threat of secure messaging. Most solutions focus on specific issues models, incomplete objectives, dubious security claims, and a lack and have different goals and threat models. This is com- of broad perspective on the existing cryptographic literature on pounded by differing security vocabularies and the absence of secure communication. a unified evaluation of prior work. Outside of academia, many In this paper, we evaluate and systematize current secure messaging solutions and propose an evaluation framework for products mislead users by advertising with grandiose claims their security, usability, and ease-of-adoption properties. We con- of “military grade encryption” or by promising impossible sider solutions from academia, but also identify innovative and features such as self-destructing messages [7]–[10]. The recent promising approaches used “in-the-wild” that are not considered EFF Secure Messaging Scorecard evaluated tools for basic by the academic literature.
    [Show full text]
  • Confidante: Usable Encrypted Email
    This paper appears at the IEEE European Symposium on Security & Privacy (2017). Confidante: Usable Encrypted Email A Case Study With Lawyers and Journalists Ada (Adam) Lerner*, Eric Zeng*, Franziska Roesner University of Washington flerner, ericzeng, [email protected] Abstract—Email encryption tools remain underused, even by Design and Prototype of Confidante. In this paper, we take people who frequently conduct sensitive business over email, another look at usable encrypted email. We design and im- such as lawyers and journalists. Usable encrypted email has plement Confidante, an encrypted email client that explores remained out of reach largely because key management and a new point in the design space. Motivating Confidante’s verification remain difficult. However, key management has design are two observations. First, we observe that many of evolved in the age of social media: Keybase is a service that the core usability pitfalls with encrypted email stem from allows users to cryptographically link public keys to their social problems with key management, sharing, and verification. media accounts (e.g., Twitter), enabling key trust without out- As we find in our user study, and echoing past findings of-band communication. We design and prototype Confidante, (e.g., [8, 11, 12, 25, 26]), asking users to reason about key an encrypted email client that uses Keybase for automatic key management wastes time and risks critical mistakes. management. We conduct a user study with 15 people (8 U.S. Second, we identify an opportunity to make new lawyers and 7 U.S. journalists) to evaluate Confidante’s design progress on this long-standing challenge by leveraging decisions.
    [Show full text]
  • Arxiv:1807.03863V1 [Cs.CR] 10 Jul 2018 the Beginning, a Powerful Tool That Provides Great Solutions for a Wide Variety of Problems
    Blockchain-based PKI for Crowdsourced IoT Sensor Information Guilherme Pinto1, Jo~aoPedro Dias2, and Hugo Sereno Ferreira2 1 Faculty of Engineering, University of Porto, Portugal [email protected] 2 INESC TEC and Department of Informatics Engineering, Faculty of Engineering, University of Porto, Portugal [jpmdias,hugosf]@fe.up.pt Abstract. The Internet of Things is progressively getting broader, evol- ving its scope while creating new markets and adding more to the existing ones. However, both generation and analysis of large amounts of data, which are integral to this concept, may require the proper protection and privacy-awareness of some sensitive information. In order to con- trol the access to this data, allowing devices to verify the reliability of their own interactions with other endpoints of the network is a crucial step to ensure this required safeness. Through the implementation of a blockchain-based Public Key Infrastructure connected to the Keybase platform, it is possible to achieve a simple protocol that binds devices' public keys to their owner accounts, which are respectively supported by identity proofs. The records of this blockchain represent digital signa- tures performed by this Keybase users on their respective devices' public keys, claiming their ownership. Resorting to this distributed and decen- tralized PKI, any device is able to autonomously verify the entity in control of a certain node of the network and prevent future interactions with unverified parties. Keywords: Internet of Things · Blockchain · Public Key Infrastructure. 1 Introduction The Internet of Things concept gained popularity in the last couple of years. The convergence of the Internet with the RFID capabilities constituted, from arXiv:1807.03863v1 [cs.CR] 10 Jul 2018 the beginning, a powerful tool that provides great solutions for a wide variety of problems.
    [Show full text]