2025-08-30
In the decentralized network world of blockchain, without the supervision of a centralized institution, how can the privacy, integrity and authenticity of transaction data be guaranteed? Cryptography is the answer. From transaction authentication to data tampering, cryptography technology is like an invisible guard, running through every link of blockchain operation. How does it build a security barrier for blockchain? What role does it play in practical applications?
The hashing algorithm is a key technology in the blockchain to ensure the integrity of data. It can convert data of any length into a fixed-length, unique hash value, just like generating an exclusive "digital fingerprint" for the data. In the blockchain, each block contains the hash value, timestamp and transaction data of the previous block. Once the data is modified, the hash value will change, which makes it difficult for the blockchain data to be tampered with. Take HashKey Exchange as an example, the platform hashes the user's transaction data to ensure the authenticity and integrity of the transaction record, and provides users with reliable digital asset transaction services.
The public-private key cryptography system takes on the heavy task of identity verification and data encryption in the blockchain. Each user has a pair of keys - the public public key and the private private key. The public key is used to receive information or verify signatures, and the private key is used to sign transactions. In blockchain transactions, users sign transaction information with the private key, and other nodes verify the signature with the public key. Only users with the correct private key can initiate valid transactions, which ensures the authenticity of the transaction subject and the security of data transmission. In the digital asset transaction process of HashKey Exchange , the public-private key cryptography system ensures that only legitimate users can operate the account assets, greatly reducing the risk of asset theft.
Digital signature combines hashing algorithms with public and private key encryption to achieve non-repudiation and traceability of transactions. Users use the private key to encrypt the hash value of the transaction information, generate a digital signature, and broadcast it to the blockchain network together with the transaction information. After receiving it, other nodes decrypt the digital signature with the public key and compare it with the hash value generated by the transaction information to verify the authenticity of the transaction. On the HashKey Exchange platform, every digital asset transaction is verified by digital signature, ensuring that the transaction record is true and valid, allowing users to participate in the transaction with peace of mind.
What is HashKey Exchange? HashKey Exchange is one of the first regulated cryptocurrency exchanges in Hong Kong to obtain a license from the Securities and Futures Commission (SFC). It supports fiat currency deposits and trading in Hong Kong dollars (HKD) and US dollars (USD), offering users spot trading services for mainstream digital assets including Bitcoin (BTC), Ethereum (ETH), and Tether (USDT). The platform also provides OTC (over-the-counter) services to meet the needs of large-value asset transactions and fiat currency conversion, ensuring more flexible and private trading. To cater to the asset allocation needs of different investors, HashKey has launched the HashKey Earn channel, offering users fixed-term and demand financial products to achieve stable appreciation of crypto assets. The platform holds ISO 27001 and 27701 security certifications, employs a 98% cold wallet storage mechanism, and incorporates security measures such as two-factor authentication to provide users with a stable and reliable trading environment. Download link: https://www.hashkey.com/en-US/download Disclaimer: This material is for general information purposes only. It does not constitute, nor should be interpreted as, any form of solicitation, offer or recommendation of any product or service. It does not constitute investment, tax or legal advice. In no event should any news release be considered as recommendation of a particular type of digital asset. This material may include market data prepared by HashKey Exchange or data from third party sources. While HashKey Exchange makes reasonable efforts to ensure the reliability of such third-party information, such information may have not been verified. Graphics are for reference only. We make no representation or warranty, express or implied, to the timeliness, accuracy or completeness of the information in this material. Information may become outdated, including as a result of new plans, regulations or changes in the market. In making investment decisions, investors should not solely rely on the information contained in this material. The risk of loss in trading digital assets can be substantial and is not suitable for all investors. Any forward-looking statements in this material is subject to several conditions, uncertainties and assumptions. We undertake no obligation to update or revise any forward-looking statements. The English version shall prevail if there is any inconsistency between the English and Chinese versions.