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Truly Anonymous Credentials Using Modern Cryptography - Matthew Di Ferrante
 
43:44
When using anonymous networks like Tor or I2P, one problem is always how to prevent spam/DoS attacks when you cannot distinguish one entity from another, and hence cannot limit them without either compromising their anonymity by requiring registration of some kind, or requiring captcha-like challenges which are time consuming to implement and usually only a temporary solution at best. Here I introduce a new kind of authentication system based on homomorphic properties of elliptic curve cryptography and zero knowledge proofs called "Linkable Ring Signatures". It allows one to add their public key to a larger group of existing public keys, called a "ring", and sign using the entire "ring" of keys + private key in such a way that no one can tell which private key has signed the message, but can mathematically verify that it was one private key corresponding to one of the public keys in the ring. On top of that, it allows a verifier that only has access to the public keys in the ring to make sure that for any one [message, ring] pair, a private key has only signed it once - duplicate signatures for the same message are detectable. This allows for limiting interactions from any party holding one of these access keys (to say, one message per minute per key), without the party losing any anonymity as their signature is indistinguishable from any other party in the ring. Furthermore, because ring signatures use a cryptographic component called "zero knowledge proofs", signing reveals zero information about the private key - hence no matter how many signatures are generated, it is impossible to use them to try to forge messages or fingerprint/bruteforce the signer key. The proof of this will be shown in the talk. In this talk I will walk through the cryptographic primitives that make this possible, and show a demo service on Tor/I2P that implements this scheme to make an anti-spam anonymous forum.
IPSec Site-to-Site VPNs w/Static Virtual Tunnel Interfaces (SVTI): IKEv1 & IKEv2
 
02:36:29
The following video tutorial takes a deep dive into Static Virtual Tunnel Interface (SVTI) interfaces along with both IKEv1 and IKEv2. We explore all the similarities and differences between the configuration and operation of SVTIs with IKEv1 and IKEv2. The IKEv1 scenario connects two offices together over the Internet and the IKEv2 scenario connects up two offices over an MPLS L3 VPN architecture. Thanks to some typos we also get to troubleshoot what happens when you use a route-map with the wrong name, what happens when a route is learned via eBGP and you want it to be learned via EIGRP (AD concerns!), and when you enter in IP addresses wrong (good troubleshooting)! In each scenario the configuration for either EIGRP or OSPF is done so you can see how to run either routing protocol over your SVTI. The next video will show the same thing, but with crypto-maps! Enjoy!
Views: 9789 Travis Bonfigli
Intervalue ICO AMA with CryptoArnie | The Underdog 4.0 DAG Project Rivaling Hashgraph, IOTA & Seele
 
01:45:53
Website: http://www.inve.one/ Intervalue Telegram: https://t.me/joinchat/HFJWYxCcv_bhLzTrdfzmGQ CryptoArnie Telegram: https://t.me/CryptoArniePublic What is InterValue? The InterValue project focuses on the core technology of Blockchain infrastructure and platform level. The goal is to build the underlying infrastructure covering all fields at the ecological level, which conquers the key technical problems. Main Technological Innovation (1)In the communication layer of the underlying P2P network node: The original anonymous P2P communication network is realized by combining the existing Tor-based anonymous communication network, the Blockchain-based distributed VPN and the advantages of the Blockchain-based distributed content sharing network. The protocol of node anonymity access is designed, and the private encrypted communication protocol is realized. These two protocols greatly enhance the anonymity of nodes in the underlying communication network and ensure that the communication between nodes is hard to be traced and cracked. (2)At the underlying data structure Layer A new data structure with an enhanced directed acyclic graph (HashNet) is adopted, which greatly reduces the storage space required by the nodes and improves the efficiency and security of the underlying data storage. (3)At the consensus mechanism Layer We designed three different consensus mechanism: a HashNet based consensus mechanism, BA-VRF consensus mechanism, basic DAG consensus mechanism. A consensus mechanism based on HashNet to enhance the consensus of DAG and BA-VRF consensus mechanism for notary selection is presented. In project version 1.0, due to the fact that HashNet-based DAG consensus is more difficult to implement, we first implement a two-Layer consensus mechanism that combines DAG consensus with BA-VRF. These consensuses all support high transaction concurrency, fast transaction confirmation speed, and building eco-systems for different application scenarios. (4)At the Layer of anti-quantum attack New anti-quantum algorithms are adopted, which replaces the existing SHA series algorithm with the Keccak-512 hash algorithm, and replaces the ECDSA signature algorithm with an integer lattice-based NTRUsign signature algorithm. These algorithms reduce the threat which brings from the quantum computing development and gradual popularization of a quantum computer. (5)At the Layer of anonymous transaction Combined with the characteristics of cryptocurrency such as Monroe and ZCash, the zero-knowledge proof and ring signature are used to design transaction anonymity and privacy protection method with high effective cost ratio and excellent security to meet privacy requirements of different application scenarios. (6)At the Layer of smart contracts We adopt the Turing comprehensive contract with fair distribution mechanism and support the issuance of third-party assets, which can take place in the form of the public Blockchain, permission (private) Blockchain, consortium (hybrid) Blockchain to the actual application scenario. (7)At the Layer of cross-link communication and multi-chain fusion The use of relay chain technology to cross-chain communication and multi-chain fusion function module as a single layer overlay to achieve, not only can maintain the independence of cross-chain operation, but also reuse InterValue basis chain Various functions. (8)At the ecologically motivated Layer Various Token allocation tools and methods are used in combination and support for double-layer mining for miners' incentives. (9)At the industry application level The development of JSON-RPC industry common interfaces, such as circulation payment, data transmission, data search, and contract invocation, supports various applications at the upper level.
Views: 2394 Crypto Arnie
MicroNugget: Site to Site IPsec VPNs using Virtual Tunnel Interfaces (VTIs)
 
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Not a subscriber? Start your free week. http://cbt.gg/1SuiyDs Earn your CCNA with CBT Nuggets. http://cbt.gg/1LfGfxH CBT Nuggets trainer Keith Barker explains how to build and verify an IPsec site to site tunnel using virtual tunnel interfaces. This tutorial relates to Keith's CCNP Security SIMOS (300-209) training course: http://cbt.gg/TBciQ7.
Views: 8256 CBT Nuggets
Dynamic Virtual Tunnel Interface (DVTI) - Hub & Spoke Topology with IPSec
 
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Dynamic Virtual Tunnel Interface (DVTI) - Hub & Spoke Topology with IPSec - Cisco Example https://bsnetworking.blog/2017/02/02/dynamic-virtual-tunnel-interface-securing-a-hub-spoke-topology/ https://bsnetworking.blog/2017/01/28/dynamic-routing-through-ipsec-without-gre-using-vtis/
Views: 835 BSNetworking
Treinamento Redes - CISCO GETVPN - Parte 01 - LAB 01
 
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LAB 01 da primeira parte do Treinamento de Tecnologias de Rede sobre CISCO GETVPN. Veja passo a passo como configurar o KEY Server e os Group Members, assim como a verificação da efetividade da criptografia.
Views: 173 Canal PINETech TV
Stanford Computer Forum: Applications of VRF by Dominic Williams (String Labs)
 
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Dominic Williams, CTO of String Labs, presents at Stanford Computer Forum on applications of Verifiable Random Function (VRF). = Abstract = We argue that a source of unmanipulable and unpredictable random values provides the most effective means to drive and organize decentralized networks and their higher-level applications. We demonstrate this idea by introducing two ingenious systems. Firstly we review how a network can use a “Threshold Relay” system that applies unique deterministic threshold signature cryptography (Dan Boneh’s BLS signature scheme) as a VRF to produce such a sequence of random values, further exploring how a robust high performance blockchain can be built upon the framework. Then we review how a network created using Threshold Relay can host “smart contract” software implementing an autonomous commercial banking system that applies generated randomness to give out loans algorithmically. String Labs is currently incorporating both methodologies into the DFINITY and Phi projects.
Views: 987 Tom Ding
BGP Authentication Demonstration
 
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Cisco CCIE Security Addressing and Protocols Tutorial (Complete Course Lecture No.107) Basic Functions and Characteristics of MP-BGP
Quick Configs - Static VTI IPsec (crypto, IPv6, IPv4, GRE)
 
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This CCIE oriented episode of quick configs goes into configuring a Static Virtual Tunnel Interface (VTI) for IPsec. See http://bit.ly/1VZYkFi for all CCIE notes.
Views: 661 Ben Pin
3.11 FlexVPN - Flex Server w/NGE.  Design, VRFs, and device enrollment
 
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In this kickoff installment of the flexvpn server demonstation, we review the cryptographic suite selection, the routing design, and enroll our devices with Elliptic Curve Certificates.
Views: 253 Steven Mcnutt
Breaking CISCO password type 7 without any tool (D-18)
 
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Why CISCO password type 7 is not good, decryption of it without any tools
Views: 3479 Aditya Gaur
flex vpn hub and spoke
 
01:37:02
Views: 313 My I.T
Flex VPN IKEv2 IPSEC Dynamic Virtual Tunnel Interface
 
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This is a video demonstration of me configuring IKEv2 Flex VPN using Virtual Tunnel Interfaces
Views: 212 Gareth Williams
IPsec - 8 - Hub and Spoke AH Dynamic Crypto & Dynamic Vti
 
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IPsec - 8 - Hub and Spoke AH Dynamic Crypto & Dynamic Vti
Views: 309 MCyagli
What Is 'Proof Of Stake' And Why Is It Important? | Cédric Waldburger
 
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Robert and I took the train back to Zurich and so I had a bit of time to pick his brain on a number of topics around consensus mechanisms. We talked about how DFINITY deals with some of the challenges present in current blockchains. If you're new here: I'm Cédric Waldburger, investor, founder and crypto enthusiast. Welcome to Episode 57 of my 91 vlog experiment :) I’m passionate about startups. Having founded my first company at age 14, I’ve built various tech companies, invested in ten and currently work on a productivity startup, a computer vision company and a cryptocurrency initiative. To spend as much time as possible with my companies, which are spread across two continents, I gave up on having an apartment in 2016 and have since lived out of a bag with 64 things. Follow me: Blog: http://www.cedricwaldburger.com YouTube: http://www.youtube.com/cedricwaldburger Instagram: http://www.instagram.com/cedricwaldburger Facebook (private): http://www.facebook.com/cediwaldburger Twitter: http://www.twitter.com/cediwaldburger Read this episode: https://cedricwaldburger.com/2018/06/15/what-is-proof-of-stake/
MPLS Filtering (advertised, received, host-routes, prefix-suppression)
 
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This CCIE oriented episode of quick configs goes into configuring filtering for MPLS. See http://bit.ly/1VZYkFi for all CCIE notes.
Views: 341 Ben Pin
IPsec Over DMVPN
 
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In this video you will learn IPsec over DMVPN
Views: 449 Dinesh Jangid
Flex VPN Site To Site
 
23:12
Views: 6357 Khawar Butt
Ethereum Enthusiasts NYC: DFINITY: Hail the Decentralized Cloud
 
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https://www.meetup.com/NYC_Ethereum/events/233544549/?comment_table_id=473684104&comment_table_name=event_comment Bitcoin gave us a decentralized protocol that produced an indestructible, tamperproof virtual ledger. Ethereum took this further with a decentralized protocol that produced an indestructible, tamperproof virtual computer without backing servers that can fail or be meddled with. DFINITY is an Ethereum variant that extends the approach, introducing advanced new protocols that enable the virtual computer to scale out as new clients join the network: in short, it introduces decentralized cloud computing. Other innovations include decentralized governance via a "Blockchain Nervous System" system that can reverse hacks and continuously upgrade the protocol without dreaded "hard forks". Join us to hear from Dominic Williams, President/CTO String Labs about these new approaches and protocols, including the Threshold Relay system that delivers revolutionary and game-changing improvements in security and performance. DFINITY is fully Ethereum compatible and aims to support key Ethereum technologies such as the EVM. With its different focus, DFINITY extends the Ethereum ecosystem while making it stronger and more attractive to those looking to build on decentralized platforms. The project is being incubated by String Labs of Palo Alto, the only venture-backed company working exclusively with Ethereum technologies in Silicon Valley.
Views: 817 Michael Arief
22. Guest Lecture by MIT IS&T
 
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MIT 6.858 Computer Systems Security, Fall 2014 View the complete course: http://ocw.mit.edu/6-858F14 Instructor: Mark Silis, David LaPorte In this lecture, Mark Silis and David LaPorte talk about information security and their roles at MIT IS&T. License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 2574 MIT OpenCourseWare
Coinscrum {minicon} DFINITY CTO Dominic Williams (Slides linked below)
 
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Coinscrum {mini-con} : w/ DFINITY Chief Scientist Dominic Williams Click here to follow presentation slides https://www.slideshare.net/secret/CSEeuZc8m5HnLp http://www.coinscrum.com/ Recorded by Proof of Work Media London 2017 Follow Coinscrum: https://twitter.com/coinscrum Tip BTC: 1EJDArq3Ye1wi9gdSC1hgFuZYkK15DVuQn
Views: 165 Coinscrum
IPv6 multicast over IPv6 IPSec VTI
 
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Native IPv6 Multicasting using IPv6 PIM BSR over IPv6 IPSec VTI. For more detailed lab configuration take a look at the detailed lab at: http://cciethebeginning.wordpress.com/2013/10/07/ipv6-multicast-over-ipv6-ipsec-vti-3/
Views: 563 AJ NOURI