| IT |
気になる、記になる… |
ヤマダウェブコム、M1 Max/Ultra搭載｢Mac Studio｣を最大16万円オフで販売する3日間＆在庫限定セールを開催中 |
https://taisy0.com/2023/08/25/175823.html
|
apple |
2023-08-25 03:36:10 |
| IT |
気になる、記になる… |
【Kindle本セール】3,000冊以上のビジネス書が最大半額の｢Kindle本ビジネス書キャンペーン｣開始 |
https://taisy0.com/2023/08/25/175820.html
|
学研プラス |
2023-08-25 03:25:11 |
| IT |
気になる、記になる… |
【Kindle本セール】幻冬舎が年に2回開催する｢幻冬舎電本フェス｣の前夜祭セールがスタート ｰ 500冊以上が最大70％オフに |
https://taisy0.com/2023/08/25/175818.html
|
amazon |
2023-08-25 03:13:29 |
| IT |
ITmedia 総合記事一覧 |
[ITmedia ビジネスオンライン] ビジネスパーソンが選ぶ住みよい街 3位「中央区」、2位「千代田区」、1位は？ |
https://www.itmedia.co.jp/business/articles/2308/25/news126.html
|
itmedia |
2023-08-25 12:50:00 |
| IT |
ITmedia 総合記事一覧 |
[ITmedia PC USER] ASUS、第12世代Core i5を搭載した法人向け23.8型液晶一体型デスクトップ |
https://www.itmedia.co.jp/pcuser/articles/2308/25/news128.html
|
asuse |
2023-08-25 12:50:00 |
| IT |
ITmedia 総合記事一覧 |
[ITmedia ビジネスオンライン] 物流「2024年問題」がもたらす2つの“物価暴騰”シナリオ |
https://www.itmedia.co.jp/business/articles/2308/25/news082.html
|
itmedia |
2023-08-25 12:33:00 |
| IT |
ITmedia 総合記事一覧 |
[ITmedia News] 男子プリキュア「キュアウィング」衣装発売へ 「息子が着られず泣いた」投稿が話題 |
https://www.itmedia.co.jp/news/articles/2308/25/news125.html
|
itmedia |
2023-08-25 12:31:00 |
| TECH |
Techable（テッカブル） |
アバターを近づけて通話、会話量に応じて通貨を獲得…。気軽な雑談を実現するバーチャルオフィス3選 |
https://techable.jp/archives/218033
|
雑談 |
2023-08-25 03:00:13 |
| python |
Pythonタグが付けられた新着投稿 - Qiita |
【Flaskをひとりぼっちな勉強会】＃000 学習ガイドライン |
https://qiita.com/Code-999waltz/items/bc5a3c4fd3959817bfc5
|
flask |
2023-08-25 12:30:21 |
| python |
Pythonタグが付けられた新着投稿 - Qiita |
dataclassの初期値を動的に入れる |
https://qiita.com/dengax/items/b21da8d4404f53341b3c
|
dataclass |
2023-08-25 12:22:47 |
| python |
Pythonタグが付けられた新着投稿 - Qiita |
Python3ではじめるシステムトレード：主成分分析について考える |
https://qiita.com/innovation1005/items/f6b8ec7cc8e73f13b3d0
|
主成分分析 |
2023-08-25 12:08:08 |
| AWS |
AWSタグが付けられた新着投稿 - Qiita |
AWS EC2 インスタンスまとめ |
https://qiita.com/zawazawa5809/items/f19ef3c1b4443a0aaf61
|
awsec |
2023-08-25 12:58:56 |
| golang |
Goタグが付けられた新着投稿 - Qiita |
【Go】Google Books APIs を使って書籍検索アプリを作成する |
https://qiita.com/nao-United92/items/4dceb9dc9b35b699be10
|
googlebooksapis |
2023-08-25 12:24:46 |
| Azure |
Azureタグが付けられた新着投稿 - Qiita |
Azure Portal の操作時の HTTP リクエストをブラウザを使ってみてみる |
https://qiita.com/aktsmm/items/5842d0ba9469ff6a5c02
|
armtemplate |
2023-08-25 12:36:19 |
| 海外TECH |
DEV Community |
Cryptography: The Backbone of Bitcoin Transactions |
https://dev.to/scofieldidehen/cryptography-the-backbone-of-bitcoin-transactions-1c2a
|
Cryptography The Backbone of Bitcoin TransactionsBitcoin s incredible rise as a decentralized digital currency is built upon a foundation of cryptographic principles Unlike traditional fiat money which relies on third party financial institutions to process and verify transactions Bitcoin operates on a peer to peer network that uses cryptography to ensure the integrity and security of every transaction In this article we will take an in depth look at how various cryptographic mechanisms enable Bitcoin s trustless tamper resistant system of value transfer Public Key CryptographyAt the heart of Bitcoin s infrastructure lies public key cryptography a set of cryptographic algorithms that uses pairs of keys public keys and private keys to encrypt and decrypt data These keys are mathematically linked but deriving the private key from the public key is practically impossible This property allows Bitcoin users to freely share their public keys which act as their account numbers or addresses without compromising the security of their private keys which are kept secret and used to authorize transactions Here s how public key cryptography works in Bitcoin Key Generation Each user generates their public private key pair through a standard key generation algorithm The public key can then be openly shared as their Bitcoin address to receive funds Encryption The public key encrypts data such as transaction details This data can only be decrypted by the corresponding private key Signing The private key can also be used to digitally sign messages and transactions to certify their origin and authenticity Anyone can verify the signature using the signer s public key but it cannot be replicated without the private key This asymmetry between the private and public keys is what enables secure value transfers in Bitcoin the public key disseminates funds while the private key controls them Digital Signatures and Transaction AuthenticationIn Bitcoin s distributed peer to peer system it is critical to ascertain that the owner of some funds authorized a transaction before it is recorded on the blockchain ledger This prevents double spending and other fraud Digital signatures based on public key cryptography allow senders to prove ownership and authorize transactions The sender digitally signs the transaction with their private key to make a transfer This signature is unique and cannot be forged without knowledge of the private key When a Bitcoin transaction is broadcast to the network participants can verify the authenticity of the digital signature by checking it against the sender s public key This provides mathematical proof that the transaction was created by the rightful owner Invalid or corrupted transactions are rejected Once verified the transaction is included in a block with other transactions and added to the immutable blockchain Bitcoin s incorruptible distributed ledger Cryptographic Hash FunctionsHash functions are the glue that holds the blockchain together and ensures its integrity A cryptographic hash function takes an input string of any length and transforms it into a unique fixed length output known as a hash value or checksum Bitcoin uses the SHA algorithm to generate a verifiably random bit hash for each block Even the smallest change to the input data results in an entirely different hash creating a digital fingerprint of the input In Bitcoin s blockchain each block contains the previous block s hash in its header This effectively chains the blocks together creating a tamper evident record of transactions If someone tries to alter a transaction in a past block it will change its hash As a result the hash embedded in the next block would no longer match breaking the chain This property makes transactions irreversible and the blockchain history immutable Miners validate transactions by hashing block headers as part of the proof of work consensus mechanism Any corrupted block would be rejected by the network Securing Keys and WalletsWhile public keys can be openly shared to transact on the Bitcoin network the security of private keys is paramount If someone gains access to the private key they effectively control the funds in that Bitcoin address Users typically rely on digital Bitcoin wallets to securely generate store and manage their private keys Wallets provide key encryption backup mechanisms multi signature options and other layers of security tailored to handle private keys safely Many wallets allow users to keep control of private keys without storing them for instance by generating keys offline or through standardized mnemonic passphrases Online or hosted wallets may store keys in encrypted cloud servers Hardware wallets offer isolated offline environments to store private keys Following best practices regarding private key generation storage and handling is critical to avoid theft or loss of funds ConclusionThis overview covers the key cryptographic concepts and mechanisms that enable Bitcoin s reliable functionality as a decentralized peer to peer digital currency Public key cryptography enables users to transact on the network using key pairs securely Digital signatures authorize valid transactions while preventing fraud Hash functions chain blocks together to create an immutable record on the blockchain Private keys must be carefully secured in digital wallets to prevent loss of funds The reliability of these cryptographic foundations ensures that transactions on the Bitcoin network gain decentralized consensus and remain final transparent and resistant to tampering the essential attributes of sound digital money If you find this post exciting find more exciting posts like this on Learnhub Blog we write everything tech from Cloud computing to Frontend Dev Cybersecurity AI and Blockchain Resource Princeton Bitcoin textbook Bitcoin Developer Guide Cryptography |
2023-08-25 03:38:05 |
| 海外科学 |
NYT > Science |
How a Harvard Professor Became the World’s Leading Alien Hunter |
https://www.nytimes.com/2023/08/24/magazine/avi-loeb-alien-hunter.html
|
How a Harvard Professor Became the World s Leading Alien HunterAvi Loeb s single minded search for extraterrestrial life has made him the most famous practicing astronomer in the country ーand possibly the most controversial |
2023-08-25 03:46:02 |
| 金融 |
日本銀行：RSS |
資金循環（日米欧比較）（2023年第1四半期） |
http://www.boj.or.jp/statistics/sj/sjhiq.pdf
|
資金 |
2023-08-25 13:00:00 |
| ニュース |
BBC News - Home |
Historic Trump mugshot released after arrest in Atlanta, Georgia |
https://www.bbc.co.uk/news/world-us-canada-66612345?at_medium=RSS&at_campaign=KARANGA
|
atlanta |
2023-08-25 03:05:06 |
| ビジネス |
不景気.com |
埼玉の印刷業「日照堂」に破産開始決定、負債6億円 - 不景気com |
https://www.fukeiki.com/2023/08/nisshodo.html
|
埼玉県川口市 |
2023-08-25 03:14:06 |
| マーケティング |
MarkeZine |
定性データで企業価値は創造できるのか？ 分析方法や社内における仕組みづくりのポイントを解説 |
http://markezine.jp/article/detail/43228
|
企業価値 |
2023-08-25 12:30:00 |
| マーケティング |
MarkeZine |
博報堂DYHDが「Well-Giving Cycle」を提供 生活者の主観データを基にサービスを提案 |
http://markezine.jp/article/detail/43221
|
wellgivingcycle |
2023-08-25 12:15:00 |
| IT |
週刊アスキー |
NVIDIA、AI特需で純利益9倍 株価も一時500ドルを突破 |
https://weekly.ascii.jp/elem/000/004/152/4152051/
|
nvidia |
2023-08-25 12:20:00 |
| IT |
週刊アスキー |
メタ、コードの生成に特化したAIモデル「Code Llama」を研究・商用利用可で公開 |
https://weekly.ascii.jp/elem/000/004/152/4152019/
|
codellama |
2023-08-25 12:10:00 |
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