# blockchain

jiwonish

앗뇽앗뇽 나는 죠니야🙋🏻‍♀️오늘은 우리 블록체인에 대해 같이 공부해봐요~블록체인이란 데이터를 '블록'에 담아 체인형태로 연결하고, 이를 여러 대의 컴퓨터에 복제하여 저장하는 분산형 데이터 저장기술입니다. 중앙 집중형 서버에 거래 데이터를 보관하지 않고, 모든 사용

blockchainhlce

Also known as hash treeEvery leaf node is labeled with the hash of a data blockEvery non-leaf node is labeled with the cryptographic hash of the label

blockchainhlce

Blockchain is a decentralized computation and information sharing platform that enables multiple authoritative domains, who do not trust each other to

blockchainhlce

Immutable: no party will be able to change the contract once it is fixed and written to the public ledger(the blockchain)Distributed: all the steps of

blockchainhlce

A permissioned blockchain framework that provides an enterprise-grade foundation for transactional applicationsA shared ledger that supports smart con

blockchainhlce

Bitcoin is permission-less, you do not need to set up an “account”, or required any e-mail address, user name, or password to login to the walletThe p

blockchainhlce

The attack: successful use of the same fund twice A transaction is generated with BTC 10 to both Bob and Carol at the same timeThe solution:The transa

blockchainhlce

Basic cryptographic primitives behind the blockchain technologyA cryptographically secure Hash functionDigital signatureHash function: used to connect

blockchainhlce

An economic measure to deter service abuses by requiring some work from the service requester(usually processing time by a computer)The idea came from

blockchainhlce

this concept of consensus is an interesting topic in a decentralized or distributed network. So, consensus means it is a procedure to reach a common

blockchainhlce

The transaction in a bitcoin network happens in this particular way. So, after Alice joins the bitcoin network after that joining by opening her app

blockchainhlce

In the last discussion, we have looked into a little detail about the bitcoin basic-2 transactions and how we make a transaction of certain bitcoin fr

blockchainhlce

Basic cryptographic primitives behind the blockchain technologyA cryptographically secure Hash functionDigital signatureHash function: used to connect

jiwonish

앗뇽앗뇽 나는 죠니야 🙋🏻‍♀️ 개발을 싫어하는 개발자 죠니랑 같이 통계 사이트 만들 사람 구해요 :) 컨트랙트를 읽어서 생성된 DID개수를 차트로 보여주는 페이지를 만들어 볼거에요 ! 저는 총 3개의 서버를 사용할겁니다. DB를 조회하고 생성하는 스케줄러 서버

blockchainhlce

states and Vaults in the R3 Corda storage aspect, each node in the network maintains a vault and it is really a database that tracks all the data that

blockchainhlce

Validity Consensus is a recursive process and it could be time-consuming. That could act as a negative for Corda because of the fact that they do not

blockchainhlce

Corda is really a permission blockchain network or I should not really say it is a Blockchain because I should call it a distributed ledger but there

blockchainhlce

Blockchain decentralized computation and information sharing platform that enables multiple authoritative domains, who do not trust each other, to coo

dnjscksdn98

암호화는 평문을 암호로 만드는 것입니다.(cipher, encrypt)복호화는 암호를 평문으로 만드는 것입니다.(decipher, decrypt)암호화에 사용한 키와 복호화에 사용한 키가 동일한 경우 대칭키 암호로 분류됩니다.반대로 다를 경우에는 비대칭키 암호로 분류됩

dnjscksdn98

퍼블릭과 프라이빗의 구분은 블록체인에 다음을 수행할 수 있는지 확인하여 결정:누구든지 기록된 정보(블록)를 자유롭게 읽을 수 있는지?명시적인 등록 또는 자격취득 없이 정보를 블록체인 네트워크에 기록할 수 있는지?블록체인의 정보가 공개되어 있고, 네트워크가 정한 기준(e