November 2019
Beginner to intermediate
408 pages
9h 29m
Korean
Content preview from 밑바닥부터 시작하는 비트코인
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
4
장
직렬화
123
지금까지 많은 클래스를 만들었습니다.
PrivateKey
,
S256Point
,
Signature
클래스가 그 예입
니다. 이제 이러한 클래스의 객체들을 네트워크로 다른 쪽에 보내거나 영구 저장장치에 저장하
는 방법을 생각할 때입니다. 바로 직렬화가 필요한 상황입니다. 예를 들어 우리는
S256Point
,
Signature
,
PrivateKey
를 주고받거나 저장하려고 합니다. 이때 네트워크 사용 비용과 영
구 저장매체에 보관하는 비용을 최소화하기 위해 클래스의 크기를 최소화하는 것이 바람직합
니다.
4.1
비압축
SEC
형식
먼저 공개키 클래스인
S256Point
클래스부터 직렬화하겠습니다. 기억하겠지만 타원곡선 암호
방식에서 공개키는 (
x
,
y
) 좌표 형식입니다. 이를 어떻게 직렬화할 수 있을까요?
이미
ECDSA
공개키를 직렬화하는 표준안이 존재합니다. 이를
SEC
Standards
for
Efficient
Cryptography
형식이라고 하는데, 이름에서 알 수 있듯이 이 방식은 아주 작은 오버헤드만 요구합니다. 공개
키 관련해서는 비압축식과 압축식 두 가지
SEC
형식이 있습니다. 먼저 비압축식을 알아보고
그다음 압축식을 알아보겠습니다.
직렬화
CHAPTER
4
밑바닥부터 시작하는 비트코인
124
다음은 주어진 점
P
= (
x
,
y
)에 대한
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.