KeePass是一个高度安全且受欢迎的开源密码管理器，用于以安全的方式存储和管理密码、用户名和其他敏感信息。它由Dominik Reichl开发，可用于包括Windows、macOS、Linux和移动设备在内的各种平台。

KeePass的一个关键功能是其强大的安全性。它使用强加密算法（例如，AES，Twofish）来保护存储的数据，确保只有拥有主密码的授权用户可以访问他们的密码。主密码作为解锁加密数据库的主要密钥。

KeePass提供了一个用户友好的界面，允许用户使用文件夹和类别以结构化的方式组织密码。此外，它提供了密码生成工具，帮助用户创建复杂且独特的密码以增强安全性。

该软件使用户能够快速搜索特定密码，并提供自动填充等功能，可以自动填写网站和应用程序的登录表单。KeePass 还支持插件，扩展其功能并使其可定制以满足个人需求。

此外，KeePass通过允许用户将其加密的密码数据库存储在各种存储介质上，如本地驱动器、USB驱动器或云存储，从而强调了便携性和可访问性。这使用户能够在不同设备上访问其密码，同时保持安全性和隐私性。

总体来说，KeePass 是一个可靠且安全的密码管理解决方案，可以帮助用户整理和保护敏感信息。

关键特性：

• 安全密码存储安全存储和管理密码。
• 强加密: 使用高级加密进行数据安全。
• 主密码和密钥文件使用强主密码和可选密钥文件访问数据库。
• 双因素认证 (2FA)：提供额外的安全层。
• 自动输入功能自动化输入用户名和密码。
• 密码生成器：创建强且随机的密码。
• 组织密码将密码分类为组和子组。
• 搜索与筛选快速查找特定条目。
• 自定义字段: 向条目添加额外信息。
• 附件: 安全地将文件附加到密码条目。
• 安全功能: 提供额外的安全选项。
• 跨平台: 可在各种操作系统上访问。
• 插件和扩展程序通过添加附加功能来扩展功能。
• 进出口轻松导入/导出密码。
• 数据库同步: 安全地跨设备同步数据库。

• The estimated password quality (in bits) is now displayed on the quality progress bar, and right of the quality progress bar the length of the password is displayed.
• Auto-Type: before sending a character using a key combination involving at least two modifiers, KeePass now first tests whether this key combination is a registered system-wide hot key, and, if so, tries to send the character as a Unicode packet instead.
• Auto-Type: added workaround for Cygwin's default Ctrl+Alt behavior (which differs from Windows' behavior).
• Auto-Type: added {APPACTIVATE ...} command.
• {HMACOTP} placeholder: added support for specifying the shared secret using the entry strings 'HmacOtp-Secret-Hex' (secret as hex string), 'HmacOtp-Secret-Base32' (secret as Base32 string) and 'HmacOtp-Secret-Base64' (secret as Base64 string).
• {T-CONV:...} placeholder: added 'Uri-Dec' type (for converting the string to its URI-unescaped representation).
• Added placeholders: {URL:USERINFO}, {URL:USERNAME} and {URL:PASSWORD}.
• Added placeholders: {BASE}, {BASE:RMVSCM}, {BASE:SCM}, {BASE:HOST}, {BASE:PORT}, {BASE:PATH}, {BASE:QUERY}, {BASE:USERINFO}, {BASE:USERNAME}, {BASE:PASSWORD} (within an URL override, each of these placeholders is replaced by the specified part of the string that is being overridden).
• Added {NEWPASSWORD:/Profile/} placeholder, which generates a new password for the current entry using the specified password generator profile.
• Pattern-based password generator: the '^' character now removes the next character from the current custom character set (for example, [a^y] contains all lower-case alphanumeric characters except 'y').
• Enhanced syntax highlighting in the sequence field of the 'Edit Auto-Type Item' dialog.
• Added option 'Do not ask whether to synchronize or overwrite; force synchronization'.
• Added synchronization support for the group behavior properties 'Auto-Type for entries in this group' and 'Searching entries in this group'.
• Root group properties are now synchronized based on the last modification time.
• While saving a database, a shutdown block reason is now specified.
• Added 'Move to Group' menu in the 'Selected Entries' popup of the main entry list context menu.
• Items of dynamic menus (tags, strings, attachments, password generator profiles, ...) now have auto-assigned accelerator keys.
• As alternative to Ctrl+F, pressing F3 in the main window now displays the 'Find' dialog.
• Added UIFlags bit for hiding password quality progress bars and information labels.
• Enhanced system font detection on Unix-like systems.
• When using 'xsel' for clipboard operations on Unix-like systems, text is now copied into both the primary selection and the clipboard.
• Added '--version' command line option (for Unix-like systems).
• Plugins can now subscribe to an IPC event that is raised when running KeePass with the '-e:' command line parameter.
• Added workaround for .NET AutoWordSelection bug.
• Added workaround for Mono bug 10163; saving files using WebDAV now also works under Mono 2.11 and higher.
• Added workaround for Mono image tabs bug.
• Added workaround for Mono NumericUpDown drawing bug.

• Merged the URL scheme overrides and the 'Override all URLs' option into a new dialog 'URL Overrides'.
• Improved autocompletion of IO connection parameters using the MRU list (now treating the user name as filter).
• Improved interaction of IO connection trigger parameters and the MRU list.
• The master key prompt dialog now validates key files only when clicking [OK], and invalid ones are not removed automatically from the list anymore.
• Improved support for managing columns leftover from uninstalled plugins in the 'Configure Columns' dialog.
• If the 'Unhide Passwords' policy is turned off, the passwords column in the auto-type entry selection dialog is now unavailable.
• The entry list in the main window is now updated immediately after performing auto-type or copying data to the clipboard.
• Various list view performance improvements.
• The 'Searching entries in this group' group behavior properties are now ignored during resolving field references.
• Improved behavior in case of syntax errors in placeholders with parameters.
• Two-channel auto-type obfuscation: improved realization of clipboard paste commands.
• General main window keyboard shortcuts now also work within the quick search box and the database tab bar.
• Pressing Ctrl+Shift+Tab in the main window now always selects the previous database tab (independent of which control has the focus).
• Changed shortcut keys for moving entries/groups on Unix-like systems, due to Mono's incorrect handling of Alt (preventing key events) and navigation keys (selection updated at the wrong time).
• Auto-Type: improved modifier key releasing on Unix-like systems.
• Various code optimizations.
• Minor other improvements.

• A key-up event to the groups tree in the main window without a corresponding key-down event does not change the entry list anymore.