The blockchain is a ledger of transactions, which is decentralized, immutable and auditable. It is an abstract concept. One cannot say blockchain is slow — or insecure. If it is slow or insecure, then it has to be a blockchain implementation. Differentiating blockchain as a concept from its implementation is quite important in understanding its potential. Bitcoin is the very first implementation of blockchain, and due to the same reason, people who talk about blockchain, literally mean the bitcoin blockchain.  This talk covers the key fundamentals of blockchain.  
1. Distributed vs. Decentralized 
2. Immutability 
3. Distributed Consensus
4. Proof-of-Work 
5. Proof-of-Stake 
6. Byzantine Generals Problem 
7. Double Spending Problem 
8. Permissioned/Permissionless Blockchain 
9. Bitcoin fundamentals


About the speaker:
Prabath is the senior director of security architecture at WSO2. He has over 11 years of industry experience that currently involves providing security architecture solutions to many of WSO2’s key customers.  He has spoken at several global user conferences including ApacheCon, OSCON, QCon, WSO2Con, and European Identity Conference, among others. He has also authored four books related to Apache Maven, enterprise integration, and API security. Prabath is an Apache Axis2 PMC member as well as a member of OASIS Identity Metasystem Interoperability (IMI) TC,OASIS eXtensible Access Control Markup Language (XACML) TC, OASIS Security Services (SAML) TC, OASIS Identity in the Cloud TC and OASIS Cloud Authorization (CloudAuthZ) TC.
Find him LinkedIn at https://www.linkedin.com/in/prabathsiriwardena/ and his blogs in medium at https://medium.com/@prabath


Webex details:
Meeting number: 643 841 542
Meeting link: https://virginiatech.webex.com/virginiatech/j.php?MTID=mcfdb5426cab4b30ccbda0c93031b9e12
Audio connection:
+1-855-749-4750 US TOLL FREE
+1-415-655-0001 US TOLL
Access code: 643 841 542

Event Contact:
Saliya Ekanayake