최 호민

최 호민

1615735600

개발자가 설명해주는 비트코인 채굴 방법 (ft 시뮬레이터)

“작업증명 (Proof of Work)” 그리고 채굴 시뮬레이터까지!
왜 빗코 가격이 오르는데 그래픽 카드가 비싸지는것일까?
휴. 12분안에 설명 (특히 편집) 하느라 힘들었슴.

Timestamps

  • 00:00​ Intro
  • 00:57​ 블록체인은 무엇인가 | What is Blockchain
  • 01:56​ 작업증명 | Proof of Work
  • 02:29​ 채굴 | Mining
  • 04:54​ 비트코인 생성의 원리
  • 05:59​ 작업증명 시뮬레이터 | PoW Simulator
  • 07:32​ 논스 | Nonce
  • 10:18​ 비트코인 난이도 | Difficulty
  • 11:00​ 왜 그래픽카드인가 | Graphic Card
  • 11:50​ 다음 영상 예고 | Next Video

#bitcoin #blockchain #developer

What is GEEK

Buddha Community

개발자가 설명해주는 비트코인 채굴 방법 (ft 시뮬레이터)
최 호민

최 호민

1615735600

개발자가 설명해주는 비트코인 채굴 방법 (ft 시뮬레이터)

“작업증명 (Proof of Work)” 그리고 채굴 시뮬레이터까지!
왜 빗코 가격이 오르는데 그래픽 카드가 비싸지는것일까?
휴. 12분안에 설명 (특히 편집) 하느라 힘들었슴.

Timestamps

  • 00:00​ Intro
  • 00:57​ 블록체인은 무엇인가 | What is Blockchain
  • 01:56​ 작업증명 | Proof of Work
  • 02:29​ 채굴 | Mining
  • 04:54​ 비트코인 생성의 원리
  • 05:59​ 작업증명 시뮬레이터 | PoW Simulator
  • 07:32​ 논스 | Nonce
  • 10:18​ 비트코인 난이도 | Difficulty
  • 11:00​ 왜 그래픽카드인가 | Graphic Card
  • 11:50​ 다음 영상 예고 | Next Video

#bitcoin #blockchain #developer

What is FEITIAN WALLET (FT) | What is FT token | FEITIAN WALLET (FT) ICO

IDENTITY

As the world’s leading supplier and provider of smart card operating system and digital security system solutions , FEITIAN has continuously devoted itself to providing safe and reliable products and solutions protecting sensitive information, data and software. Through 18 years of accumulated experience in technological innovation , FEITIAN has multiple authentication products to fully meet customer demands and applications. FEITIAN serves more than 200 banks and 6000 customers in over 100 countries. From traditional PKI, OTP, Smart Cards and Smart Card Readers to display cards and FIDO product line, FEITIAN has shown its commitment to innovation. FEITIAN takes a pride in providing advanced and reliable products with a high cost-performance ratio.

PAYMENTS

Payment is present everywhere in daily life. And our solutions related to payment is one of FEITIAN’s core products. FEITIAN has two product lines regarding payment: Smart cards and smart mobile payment terminals. FEITIAN payment bank cards with Visa, Mastercard, PBOC and EMVCo certification offer secure EMV transactions. Mobile payment terminals help customers to develop their business conveniently and easily. And FEITIAN’s innovative EMV display cards and blue tooth personal transaction display cards will enhance user experience for customers. We build payment security and provide high quality products.

MOBILITY

There’s no doubt that the world has entered the mobile age. Everything goes mobile. It’s important to ensure the security of mobile devices since they are the ID for accessing mobile internet. Then how to provide secure and reliable encryption and authentication products and solutions? That’s the challenge. FEITIAN has noticed the trend for years. We have developed and upgraded our product lines for mobile platforms since 2011. Now FEITIAN has integrated mobile ID/authentication/payment products and solutions.FEITIAN has actively been listening to customers demands and following the market trends. In the future, FEITIAN intends to lead the technological development inside our field.

Rising Demand vs. Rising Risk

In response to the current situation, FEITIAN Technologies as a leading global provider of network security products and solutions, provides a complete security solution from three aspects: Authentication, Communication, and Backend Server.

Authentication Security

To businesses, authentication security is always the top priority, for either personal account or enterprise account. Undoubtedly, Multi-Factor Authentication (MFA) is the most cost-effective and location-free approach.

Using One Time Password, or OTP, is one way to achieve MFA. OTP serves as an offline device and generates an one-time password per either a certain period (time-based) or a click (event-based) that no hacker could acquire without possessing the device. The device-generated password will then be matched with the one generated by server to authenticate user’s login. FEITIAN provides OTP device in both token and card forms, allowing it to be easily carried with the user everywhere 24×7.

Using FIDO Security Key is another way. The security key will require the user to interact with it, then sending a credential along with login informations to the server to authenticate. Again, only the user in possession of the security key can complete this operation, leaving no chance for hackers to manipulate.

FEITIAN’s FIDO Security Key product line covers all user authentication scenarios. For desktop/laptop computers, the standard ePass FIDO Security Key is equipped with USB Type-A/Type-C interface to communicate with. For smartphones/tablets, ePass FIDO -NFC/MultiPass FIDO security keys utilize NFC/Bluetooth technologies to expand their application range. Ultimately, if wireless communication or battery life is a concern, the company’s latest product, the MFi certified iePass FIDO Security Key, with built-in Apple Lightning and USB Type-C interfaces, could be directly plugged in to any iOS, Android, and PC devices, therefore securely authenticate the user on all major platforms.

Besides multi-interface capabilities, FEITIAN also offers biometric security keys making sure only the registered user can use the security key. By introducing a fingerprint sensor, FEITIAN BioPass FIDO Security Key further enhances the security of authentication. FEITIAN is collaborating with Microsoft to integrate multiple FIDO2 biometric passwordless security keys with Microsoft Cloud Azure services, offering secure and convenient authentication experiences for enterprise, government, healthcare, educational, and individual user applications. Additionally, with more and more cloud service providers joining this passwordless solution party, FEITIAN fingerprint FIDO security keys have become the best choice for enterprises to secure their authentication systems.

Both FEITIAN FIDO Security Keys and OTP Tokens/Carsd can be easily integrated to enterprises’ existing systems and offer a secure and cross-platform Multi-Factor Authentication.

Communication Security

To prevent private information from being exploited by falling into the wrong hands during communication, using FEITIAN ePass PKI Token, a market-proven product that has been in use for over a decade, is recommended.

FEITIAN ePass PKI token is a purpose-designed PKI cryptographic processing security hardware for secure storage of digital certificates and private keys. Designed to meet NIST FIPS 140-2 security standards, ePass PKI enables encryption function of sensitive information through only authorized identities at the highest possible level. More importantly, private data can be encrypted during transmission. ePass PKI can also be used to sign emails or documents, which can be tremendously helpful for teleworking.

Backend Server Security

Enterprise Backend Server is responsible for verifying if the person who is trying to gain access has the right permission to do so, it is always the most important part of the enterprise’s intranet system. Therefore, how to protect backend servers and how to verify “who you are” and “what you have” is critical for businesses. In response to this demand, FEITIAN offers two types of authentication server: OTP Authentication Server and FIDO Authentication Server.

OTP Authentication Server utilizes one-time password technology to provide reinforced MFA, significantly improving the security level of the system itself.

FIDO Authentication Server, by taking the protocol advantages of WebAuthN, which is a Web identity authentication standard of W3C and standardizes the public key authentication of softwares and services based on Web, provides MFA or SSO for enterprises, which will greatly enhance the security of enterprise backend servers.

mfa_server

Telecommuting offers businesses an alternative way of working to overcome these difficult times. Together with FEITIAN Security Solutions, such way of working will be more secure and efficient.

ICO DATES: To Dec 24, 2020

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Visit ICO Website ☞ CLICK HERE

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#blockchain #bitcoin #crypto #feitianwallet #ft token

배 은주

배 은주

1596313500

jQuery / HTML 문서와 연결하는 방법, 사용하는 방법

HTML 문서와 연결하기

CDN 이용하기

HTML 문서에 다음 코드를 추가합니다.

<script src="//code.jquery.com/jquery-3.3.1.min.js"></script>

3.3.1은 버전입니다. 다른 버전을 사용하고 싶다면 숫자를 변경합니다.

다운로드 받아 연결하기

jQuery 다운로드는 여기에서 합니다. 압축된 파일도 있고, 압축되지 않은 파일도 있습니다. 그리고 HTML 문서에 다음 코드를 추가합니다.

<script src="path/jquery-3.3.1.min.js"></script>

path와 파일 이름은 적절히 변경합니다.

jQuery 사용하기

다음은 ID가 jb인 h1 요소의 색을 빨간색으로 바꾸는 예제입니다.

<!doctype html>
<html lang="ko">
	<head>
		<meta charset="utf-8">
		<title>jQuery</title>
	</head>
	<body>
		<h1 id="jb">Lorem Ipsum Dolor</h1>
		<script src="//code.jquery.com/jquery-3.3.1.min.js"></script>
		<script>
			$( '#jb' ).css( 'color', 'red' );
		</script>
	</body>
</html>

#jquery #html

George  Koelpin

George Koelpin

1600384560

Data Science in Industry (Ft. RichardOnData)

In this video, I had the privilege of interviewing @RichardOnDatawhere we talked about life as a data scientist, career advice and tips for breaking into data science. Richard is a data scientist having worked in the healthcare and pharmaceutical industry. He has a background in statistics and picked up data science in graduate school where he was involved in research projects.

#data-science

AWS What's Next ft. What is Amazon Redshift?

Eugene Kawamoto, Director Product Management introduces Amazon Redshift.

Learn more about Amazon Redshift at https://amzn.to/2Ts45Cv

#aws #developer