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[什么是数据加密?](https://www.paloaltonetworks.cn/cyberpedia/data-encryption?ts=markdown) 目录 * [什么是数据安全?](https://www.paloaltonetworks.com/cyberpedia/what-is-data-security?ts=markdown) * [Why is data security important?](https://www.paloaltonetworks.cn/cyberpedia/what-is-data-security#why-is-data-security-important?ts=markdown) * [What are the benefits of data security?](https://www.paloaltonetworks.cn/cyberpedia/what-is-data-security#benefits-of-data-security?ts=markdown) * [What are the different types of data security tactics, tools, and solutions?](https://www.paloaltonetworks.cn/cyberpedia/what-is-data-security#different-types-of-data-security?ts=markdown) * [What are data security regulations?](https://www.paloaltonetworks.cn/cyberpedia/what-is-data-security#data-security-regulations?ts=markdown) * [Top 10 data security best practices, tips, and tricks](https://www.paloaltonetworks.cn/cyberpedia/what-is-data-security#data-security-best-practices?ts=markdown) * [2025 data security trends](https://www.paloaltonetworks.cn/cyberpedia/what-is-data-security#data-security-trends?ts=markdown) * [Comparing data security with other security technologies](https://www.paloaltonetworks.cn/cyberpedia/what-is-data-security#comparing-data-security?ts=markdown) * [Data security FAQs](https://www.paloaltonetworks.cn/cyberpedia/what-is-data-security#data-security-faqs?ts=markdown) * [What Is a Data Security Platform?](https://www.paloaltonetworks.com/cyberpedia/data-security-platform?ts=markdown) * [Data Security Platform Explained](https://www.paloaltonetworks.cn/cyberpedia/data-security-platform#data?ts=markdown) * [How a Data Security Platform Solves the Complexity of Data Protection](https://www.paloaltonetworks.cn/cyberpedia/data-security-platform#how?ts=markdown) * [A Data Protection Platform Reduces Risk](https://www.paloaltonetworks.cn/cyberpedia/data-security-platform#protection?ts=markdown) * [Benefits of a Data Protection Platform](https://www.paloaltonetworks.cn/cyberpedia/data-security-platform#benefits?ts=markdown) * [Data Security Platform FAQs](https://www.paloaltonetworks.cn/cyberpedia/data-security-platform#faqs?ts=markdown) * 什么是数据加密? * [数据加密解释](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#data?ts=markdown) * [加密类型](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#types?ts=markdown) * [数据加密有什么好处?](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#what?ts=markdown) * [数据加密使用案例](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#usecases?ts=markdown) * [关键选择](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#key?ts=markdown) * [数据加密和算法](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#algorithms?ts=markdown) * [加密最佳做法](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#best-practices?ts=markdown) * [数据加密常见问题](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#faqs?ts=markdown) * [什么是数据蔓延?](https://www.paloaltonetworks.com/cyberpedia/data-sprawl?ts=markdown) * [数据蔓延解释](https://www.paloaltonetworks.cn/cyberpedia/data-sprawl#data-sprawl?ts=markdown) * [数据蔓延的挑战](https://www.paloaltonetworks.cn/cyberpedia/data-sprawl#challenge?ts=markdown) * [克服数据蔓延的最佳实践](https://www.paloaltonetworks.cn/cyberpedia/data-sprawl#best-practices?ts=markdown) * [数据蔓延常见问题](https://www.paloaltonetworks.cn/cyberpedia/data-sprawl#faq?ts=markdown) * [什么是数据访问治理?](https://www.paloaltonetworks.com/cyberpedia/data-access-governance?ts=markdown) * [数据访问治理详解](https://www.paloaltonetworks.cn/cyberpedia/data-access-governance#data?ts=markdown) * [合规性和审计中的数据访问治理](https://www.paloaltonetworks.cn/cyberpedia/data-access-governance#compliance?ts=markdown) * [云安全中的数据治理](https://www.paloaltonetworks.cn/cyberpedia/data-access-governance#cloud-security?ts=markdown) * [用于数据访问管理的软件](https://www.paloaltonetworks.cn/cyberpedia/data-access-governance#software?ts=markdown) * [数据访问治理常见问题](https://www.paloaltonetworks.cn/cyberpedia/data-access-governance#faqs?ts=markdown) # 什么是数据加密? 目录 * * [数据加密解释](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#data?ts=markdown) * [加密类型](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#types?ts=markdown) * [数据加密有什么好处?](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#what?ts=markdown) * [数据加密使用案例](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#usecases?ts=markdown) * [关键选择](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#key?ts=markdown) * [数据加密和算法](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#algorithms?ts=markdown) * [加密最佳做法](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#best-practices?ts=markdown) * [数据加密常见问题](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#faqs?ts=markdown) 1. 数据加密解释 * * [数据加密解释](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#data?ts=markdown) * [加密类型](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#types?ts=markdown) * [数据加密有什么好处?](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#what?ts=markdown) * [数据加密使用案例](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#usecases?ts=markdown) * [关键选择](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#key?ts=markdown) * [数据加密和算法](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#algorithms?ts=markdown) * [加密最佳做法](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#best-practices?ts=markdown) * [数据加密常见问题](https://www.paloaltonetworks.cn/cyberpedia/data-encryption#faqs?ts=markdown) 数据加密是 [数据保护](https://www.paloaltonetworks.cn/cyberpedia/what-is-data-security?ts=markdown)的关键,它将数据转换成另一种形式或代码,以防止未经授权的访问,帮助组织维护隐私和满足合规性要求。它使用一种算法(或密码)将可读数据(称为明文)转换为不可读数据(称为密文)。只有拥有正确密钥的人才能将密文解密为明文,获取原始信息。 ## 数据加密解释 [云安全](https://www.paloaltonetworks.cn/cyberpedia/what-is-a-cloud-security?ts=markdown) 中的数据加密可确保敏感信息始终受到保护,未经授权的各方无法访问。数据加密的核心是使用特定的算法或密码,将明文数据转换成一种无法读取的格式,即所谓的密文。加密过程要求在加密和解密时都使用秘钥,对称加密在两种操作中使用相同的密钥,而非对称加密则在加密时使用公钥,在解密时使用私钥。 对于云安全而言,数据加密在确保静态和传输中的数据安全方面发挥着至关重要的作用。先进的加密技术可以提供严密的保护,防止漏洞和未经授权的访问。此外,为了加强安全性,组织可以实施密钥管理措施,包括安全的密钥存储、轮换和分发。 ## 加密类型 有两种主要的加密方式可以应对数据保护和通信方面的不同安全和后勤挑战。虽然组织可能会单独使用它们,但通常会将它们结合起来,以克服关键分配和性能需求方面的挑战。 ### 对称加密(或私钥加密) 对称加密又称私钥加密,加密和解密使用相同的密钥。换句话说,发送方和接收方共用一个密匙来加密和解密数据。与非对称加密相比,该技术所需的计算开销更少,因此为大量数据的安全提供了一种快速高效的方法。不过,对称加密也有一个缺点,那就是共享密钥的安全分发和管理受到挑战,因为未经授权访问该密钥会危及加密数据。 常见的对称加密算法包括高级加密标准(AES)和数据加密标准(DES)。 ### 非对称加密(或公钥加密) 非对称加密或公钥加密依赖于两个不同的密钥--用于加密的公钥和用于解密的私钥。公钥可以公开共享,而私钥必须保密。非对称加密解决了对称加密中的密钥分发问题,因为只需安全地存储私人密钥。但非对称加密与对称加密一样,也有缺点,那就是需要更多的计算资源,速度一般比对称加密慢。RSA(Rivest-Shamir-Adleman)是一种广泛使用的非对称加密算法。 ## 数据加密有什么好处? 从客户信息到商业机密,各组织发现自己正在浏览错综复杂的数据网络。这种数字环境虽然充满机遇,但也存在弱点。数据加密作为一种防御手段出现,可强化业务数据,确保公司能够放心、安全地运营。 数据加密的主要好处之一是保护敏感信息。数据被加密后,会转换成一种无法读取的格式,只有拥有正确解密密钥的人才能读取。这意味着,即使恶意行为者攻破了系统,被窃取的数据仍然是杂乱无章的加密文本,如果没有相应的密钥,实际上是毫无用处的。这层安全保障不仅对保护专有信息至关重要,而且对维护客户信任也至关重要。客户和顾客更愿意与他们认为会负责任地处理其个人和财务信息的组织打交道。漏洞会损害公司声誉,导致经济损失,甚至造成法律后果。 ### 合规性 在保护数据的同时,加密还有助于合规性,满足欧盟《通用数据保护条例》(GDPR)和美国《健康保险可携性和责任法案》 [(HIPAA](https://www.paloaltonetworks.cn/cyberpedia/what-is-hipaa?ts=markdown))等法律的要求。 加密通信,尤其是在金融和医疗保健等行业,可确保实体间交换的 [敏感数据](https://www.paloaltonetworks.cn/cyberpedia/sensitive-data?ts=markdown) 保持机密和不被更改。数据加密可以保护组织免受外部威胁,并使其成为客户和监管机构眼中值得信赖的数据管家。通过采用强大的加密实践,组织可以保持合规性,避免罚款和潜在的法律诉讼。 ## 数据加密使用案例 数据加密可保护信息,确保不同行业的隐私和安全。所提供的保护可保持数据完整性,并 [防止数据丢失](https://www.paloaltonetworks.com/cyberpedia/what-is-data-loss-prevention-dlp),使被盗数据无法使用,减少 [数据泄露](https://www.paloaltonetworks.cn/cyberpedia/data-breach?ts=markdown)的影响。数据加密的常见应用包括 * 确保通信--电子邮件、聊天、通话--免遭未经授权的拦截 * 确保敏感数据不被外部窃取和修改,从而增强 [云](https://www.paloaltonetworks.cn/cyberpedia/cloud-data-loss-prevention?ts=markdown) 数据的安全性 * 保持敏感数据的机密性,并合规性遵守 HIPAA、PCI-DSS、GDPR 等法规 * 在电子商务和网上银行业务中保护信用卡和银行信息的安全 * 确保静态数据的安全,特别是数据存储设备(硬盘、固态硬盘)上的文件和数据库,以防丢失或被盗 * 利用数字签名(使用非对称加密)验证信息的真实性和来源 * 通过 VPN 维护互联网流量的隐私,即使是在不信任的网络上 * 使用散列(和加盐)密码代替明文密码 * 通过端到端加密,确保只有发送方和接收方可以阅读通过信息应用程序传输的内容 * 利用加密技术保护比特币等加密货币的交易和新单位的创建 * 保护受版权保护的内容(电子图书、音乐、视频)免遭未经授权的复制或使用 * 确保 IoT 设备数据传输和存储的安全 ## 关键选择 为应用程序选择合适的加密算法和密钥管理算法,需要清楚地了解应用程序的目标和安全要求。例如,如果目标是保护存储数据,则应选择侧重于静态数据安全性的算法套件。相反,传输和接收数据的应用程序应优先考虑强调传输中数据保护的算法套件。 要确定优化的密钥管理方法,首先要理解应用的安全目标,这将指导选择合适的加密协议。申请可能需要 * 静态数据和传输中数据的保密性 * 终端设备验证 * 数据来源的真实性 * 传输过程中的数据完整性 * 用于生成数据加密密钥的钥匙 在确定了应用程序的安全要求后,组织就可以确定所需的协议和算法。在清楚了解这些协议和算法后,小组就可以着手定义支持应用目标的各种密钥类型,确保稳健的安全性和优化的性能。 ## 数据加密和算法 选择正确的加密算法是确保数据隐私和防范潜在威胁(包括量子计算带来的威胁)的早期重要步骤。您需要考虑的组织因素包括安全性和行业标准的合规性、性能、密钥管理、兼容性、可扩展性以及未来应对新兴威胁的能力。 ### 采用伽罗瓦计数器模式 (GCM) 的 AES-256 具有伽罗瓦计数器模式 (GCM) 的 AES-256 是一种广泛推荐的选择,因为它提供了强大的加密和身份验证功能。GCM 是一种经过验证的加密模式,它将高性能对称密钥块密码 AES-256 与高效信息验证码相结合,确保了数据的机密性和完整性。 ### ChaCha20 和 Poly1305 另一个可行的选择是 ChaCha20 和 Poly1305 的组合。ChaCha20 是一种流密码,可提供高速加密,而 Poly1305 则是一种加密信息验证码,可提供数据完整性。这些算法共同创建了一个安全的关联数据验证加密(AEAD)方案,确保加密数据的保密性和完整性。 ## 加密最佳做法 * 对敏感通信进行端到端加密。 * 确保数据在静态和传输过程中的安全。 * 应用多因素身份验证进行访问控制。 * 更新密码库和协议。 * 定期进行安全审计和漏洞评估。 * 对员工进行加密政策和实践方面的培训。 * 除非加密密钥已加密,否则不要将其与加密的敏感数据放在一起。 * 定期更换加密密钥。 * 遵守行业标准和监管要求,随时了解新兴的加密技术和实践,以保持强大的数据保护能力。 ## 数据加密常见问题 ### 什么是聚合加密? 收敛加密是一种加密技术,在相同的加密密钥下,相同的明文数据可生成相同的密文。这种方法利用确定性过程,通常使用明文数据的哈希值作为加密密钥。 通过为重复数据生成相同的密文,聚合加密可在云环境中实现高效存储和重复数据删除。聚合加密在带来存储优化优势的同时,也带来了安全风险。了解明文的攻击者有可能计算哈希值,推导出加密密钥,并确认加密存储中特定数据的存在,从而可能导致隐私和机密泄露。 ### 什么是加密哈希函数? 加密哈希函数是一种数学算法,它接受任意长度的输入,并生成固定长度的输出,即哈希值或摘要。使加密散列函数成为确保数据完整性和安全性的理想工具的主要特征包括 * 确定性,即相同的输入总是产生相同的哈希值 * 无法从散列值中提取原始输入值,确保单向功能。 * 抗碰撞性强,很难找到两个不同的输入能产生相同的哈希值 常用的加密哈希函数包括 SHA-256、SHA-3 和 BLAKE2,它们被用于数字签名、数据完整性验证和密码存储等各种应用中。 ### 什么是网上交易安全? 网上交易安全是指在电子商务和网上银行活动中为保护信用卡信息、银行详情和其他敏感数据而采取的措施。安全通过加密、安全通信协议和认证机制来实现。支付卡行业数据安全标准(PCI-DSS)是一套确保持卡人数据在处理、存储和传输过程中安全的要求。实施安全套接字层(SSL)或传输层安全(TLS)协议也有助于保障用户与服务器之间的数据交换。 ### 什么是静态数据保护? 静态数据保护包括保护存储在数据存储设备或云存储设备上的文件和数据库的安全。加密在静态数据保护中起着基础性作用,因为没有适当的解密密钥,数据就无法读取。 强密码和多因素身份验证等访问控制措施可限制未经授权的[访问](https://www.paloaltonetworks.cn/cyberpedia/access-control?ts=markdown),从而提高存储数据的安全性。定期数据备份和安全处置旧存储设备也有助于保护静态数据。 ### 什么是云存储安全? 云存储安全包括为保护存储在云中的数据免遭未经授权的访问、修改和删除而采取的措施。它包括对静态和传输中的数据进行加密、强有力的访问控制以及对用户活动的全面监控和记录。此外,云存储的安全性还包括遵守监管合规性、确保数据隐私以及与提供安全基础设施、定期安全更新和漏洞管理的可信云服务提供商合作。 采用 [责任共担模式](https://www.paloaltonetworks.cn/cyberpedia/cloud-security-is-a-shared-responsibility?ts=markdown),即云服务提供商和用户都采取积极主动的措施来确保数据安全,可增强云存储的安全性。 ### 什么是身份验证? 身份验证是对试图访问受保护资源的用户、设备或系统的身份进行验证的过程。它确保只有经授权的实体才能访问敏感数据和服务。常见的身份验证方法包括 * 密码 * 安全令牌 * 生物特征识别器 * 数字证书 多因素身份验证(MFA)结合了上述两种或多种方法,通过要求提供多种身份证明,大大提高了安全性。 ### 什么是 VPN? 虚拟专用网络(VPN)是一种在用户设备和远程服务器(通常由 VPN 服务提供商运营)之间建立加密连接的技术。这种安全连接使用户能够通过互联网传输数据,就像直接连接到专用网络一样,即使在不受信任的网络上也能保持隐私和保密性。 VPN 可用于访问受限制的内容、绕过审查制度以及保护敏感数据不被恶意行为者截获。企业还利用 VPN 实现对企业资源的远程访问,确保员工与组织网络之间的通信安全。 ### 什么是加密即服务(EaaS)? EaaS 是一种用户订购云加密服务而无需在系统上安装加密功能的模式。使用 EaaS 的组织可从以下方面获益: * 静态加密 * 传输中加密(TLS) * 加密服务负责密钥处理和加密实施 * 提供商可添加更多服务,与敏感数据进行交互 相关内容 [DSPM:您需要它吗? 了解数据安全的五种主要方法,以及每种数据安全方法的用例和应用。](https://www.paloaltonetworks.com/resources/datasheets/why-dspm) [2024 年保护数据和人工智能:首席信息安全官需要了解什么 与数据安全专家一起了解数据安全领域的最新进展如何帮助您发现、分类、保护和管理云环境中的数据。](https://start.paloaltonetworks.com/PrismaCloud-DSPM-on-demand-Webinar-Protecting-Data-and-AI-in-2024-What-CISOs-Need-to-Know.html) [利用 DSPM 和 DDR 确保数据安全 防范数据安全风险。了解数据安全态势管理 (DSPM) 与数据检测和响应 (DDR) 如何填补安全漏洞,加强您的安全 ...](https://www.paloaltonetworks.com/resources/guides/dspm-ddr-big-guide) [DSPM 和 DDR 购买指南 了解云数据安全提供商应具备的条件,以及 DSPM 和 DDR 如何显著增强组织的安全态势。](https://www.paloaltonetworks.com/resources/guides/data-centric-dspm-ddr-buyers-guide) ![Share page on facebook](https://www.paloaltonetworks.com/etc/clientlibs/clean/imgs/resources/facebook-circular-icon.svg) ![Share page on linkedin](https://www.paloaltonetworks.com/etc/clientlibs/clean/imgs/resources/linkedin-circular-icon.svg) [![Share page by an email](https://www.paloaltonetworks.com/etc/clientlibs/clean/imgs/resources/email-circular-icon.svg)](mailto:?subject=%E4%BB%80%E4%B9%88%E6%98%AF%E6%95%B0%E6%8D%AE%E5%8A%A0%E5%AF%86%EF%BC%9F&body=%E6%8E%A2%E7%B4%A2%E6%95%B0%E6%8D%AE%E5%8A%A0%E5%AF%86%E6%96%B9%E6%B3%95%EF%BC%8C%E4%BB%A5%E5%9C%A8%E5%A4%9A%E4%BA%91%E7%8E%AF%E5%A2%83%E4%B8%AD%E4%BF%9D%E6%8A%A4%E9%9A%90%E7%A7%81%E3%80%81%E7%A1%AE%E4%BF%9D%E5%90%88%E8%A7%84%E6%80%A7%E5%B9%B6%E9%98%B2%E6%AD%A2%E6%95%8F%E6%84%9F%E4%BF%A1%E6%81%AF%E8%A2%AB%E6%9C%AA%E7%BB%8F%E6%8E%88%E6%9D%83%E8%AE%BF%E9%97%AE%E3%80%82%20at%20https%3A//www.paloaltonetworks.com/cyberpedia/data-encryption) 返回页首 [上一页](https://www.paloaltonetworks.cn/cyberpedia/data-security-platform?ts=markdown) What Is a Data Security Platform? 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