check sum

简明释义

检查数

英英释义

例句

1.The programmer implemented a check sum algorithm to ensure data was not altered.

程序员实现了一个校验和算法，以确保数据没有被更改。

2.The software uses a check sum to verify data integrity after transmission.

该软件使用校验和来验证传输后的数据完整性。

3.Before downloading the file, make sure to compare the check sum provided by the website.

下载文件之前，请确保与网站提供的校验和进行比较。

4.If the check sum does not match, the file may be corrupted.

如果校验和不匹配，文件可能已损坏。

5.To enhance security, the application generates a check sum for each transaction.

为了增强安全性，该应用程序为每笔交易生成一个校验和。

作文

In the world of computing and data transmission, the term check sum refers to a method used to ensure the integrity of data. Essentially, a check sum is a value that is computed from a set of data and is sent along with the data itself. When the data is received, the recipient can compute their own check sum and compare it to the one that was sent. If the two values match, it indicates that the data has likely not been altered during transmission. This process is crucial for maintaining data integrity, especially in environments where large amounts of data are exchanged, such as the internet.The concept of check sum can be illustrated with a simple example. Imagine sending a message that consists of several words. Before sending, you calculate a check sum based on the content of the message. This could be done by adding up the ASCII values of each character in the message. Once the message is sent, the recipient receives both the message and the accompanying check sum. Upon receiving the message, they perform the same calculation. If their calculated check sum matches the one that was sent, they can be confident that the message has not been corrupted.However, it is important to note that while check sums are useful for detecting errors, they are not foolproof. For instance, if two different sets of data produce the same check sum, this is known as a collision. Such situations can occur, albeit infrequently, and they highlight the limitations of using check sums alone for data verification. Therefore, more robust methods, such as cryptographic hash functions, are often employed in conjunction with check sums to enhance data security.In addition to error detection, check sums also play a role in performance optimization. In scenarios where data is frequently modified, recalculating the entire set of data can be computationally expensive. Instead, by using a check sum, systems can quickly verify the integrity of data without needing to recheck every single byte. This can lead to significant improvements in efficiency, particularly in high-speed networks or large databases.Moreover, check sums are not limited to just data transmission. They are also commonly used in file storage and retrieval processes. When files are saved on a disk, a check sum can be generated and stored alongside the file. Later, when the file is accessed, the system can compute the check sum again to ensure that the file has not been tampered with or corrupted over time. This is especially important for sensitive or critical data where any alteration could have severe consequences.In conclusion, the concept of check sum is a fundamental aspect of data integrity and security in the digital age. By providing a simple yet effective means of error detection, check sums help ensure that the data we rely on remains accurate and trustworthy. As technology continues to evolve, the methods and algorithms behind check sums will likely become increasingly sophisticated, further enhancing our ability to protect and verify data across various platforms and applications.

在计算机和数据传输的世界中，术语check sum指的是一种用于确保数据完整性的方法。简单来说，check sum是一个从一组数据计算得出的值，并与数据本身一起发送。当数据被接收时，接收方可以计算自己的check sum并将其与发送方提供的值进行比较。如果这两个值匹配，则表明数据在传输过程中可能没有被更改。这个过程对于维护数据完整性至关重要，尤其是在大量数据交换的环境中，例如互联网。check sum的概念可以通过一个简单的例子来说明。想象一下发送一条由几个单词组成的信息。在发送之前，你根据消息的内容计算一个check sum。这可以通过将消息中每个字符的ASCII值相加来完成。一旦消息被发送，接收者将同时收到消息和附带的check sum。在收到消息后，他们会执行相同的计算。如果他们计算的check sum与发送的匹配，他们就可以确信消息没有被损坏。然而，需要注意的是，虽然check sum在检测错误方面很有用，但它们并不是万无一失的。例如，如果两组不同的数据产生相同的check sum，这被称为碰撞。这种情况可能会发生，尽管不频繁，但它突显了单独使用check sum进行数据验证的局限性。因此，通常会结合使用更强大的方法，例如密码散列函数，以增强数据安全性。除了错误检测之外，check sum还在性能优化中发挥作用。在数据经常被修改的情况下，重新计算整个数据集可能会消耗大量计算资源。相反，通过使用check sum，系统可以快速验证数据的完整性，而无需检查每一个字节。这可以在高速网络或大型数据库中显著提高效率。此外，check sum不仅限于数据传输。它们也常用于文件存储和检索过程。当文件保存在磁盘上时，可以生成一个check sum并与文件一起存储。稍后，当访问该文件时，系统可以再次计算check sum以确保文件没有被篡改或随时间腐败。这对于敏感或关键数据尤为重要，因为任何更改都可能导致严重后果。总之，check sum的概念是数字时代数据完整性和安全性的基本方面。通过提供一种简单而有效的错误检测手段，check sum有助于确保我们依赖的数据保持准确和可信。随着技术的不断发展，check sum背后的方法和算法可能会变得越来越复杂，从而进一步增强我们在各种平台和应用中保护和验证数据的能力。