Version 4
2025/03/11（ver.4.2.5.4）
FIX Fix a problem in which entering the decryption password once failed, and entering it again displayed a successful decryption regardless of whether the password was correct or not.
2025/03/10（ver.4.2.5.5）
FIX Fixed an issue where the `/pfile` and `/dpfile` command-line options (password file path) were not being applied correctly.
FIX Fixed an issue where .NET Framework 4.0 was sometimes not correctly selected when a self-executable archive was configured to use an older version.
FIX Fixed an exception error that occurred when selecting File → Decrypt from the menu bar immediately after launch (the file list was not properly initialized).
FIX Fixed an issue where the Secure Delete feature for the original file or folder during encryption was not working correctly (only the zero-fill pass was being performed).
IMPROVEMENT Improved the secure deletion process so that, while defeating wear-leveling on modern SSDs is beyond its scope, deleted files can no longer be recovered by common file recovery software.
FIX Fixed an issue where settings provided via the external configuration file `_AtcCase.ini` were not being reflected in the application.
2025/03/01（ver.4.2.5.3）
FIX Fix a problem in which selecting "Create one encrypted file from files" option during encryption did not create an encryption instance, resulting in an exception error.
2025/02/27（ver.4.2.5.2）
FIX Fix a problem in which when the entered password was re-entered for confirmation, a mismatch warning was displayed even if the password string was the same.
2025/02/24（ver.4.2.5.1）
FIX Fix a problem in which passing an encrypted file from the command line options would result in an overwrite confirmation message dialog, but decryption was completed before the user could respond.
FIX In relation to the aforementioned bug, Fix a problem where passing files or folders from the command line for both encryption and decryption, whereby they were passed twice and the process was run twice.
2025/02/21（ver.4.2.5.0）
NEW Add a feature to display progress by taskbar icon.
IMPROVEMENT Speed up the encryption process (by approximately 4–5%).
IMPROVEMENT Add progress indication during encryption preparation, without affecting performance.
IMPROVEMENT Allow encryption to proceed without error even when a file is in use by another process.
FIX Fix the problem that when encrypting or decrypting a large file, the MD5 hash value calculation takes time and cannot be canceled.
FIX Fix the problem that double startup processing was not being executed correctly.
FIX Fix a problem where files were not accepted when dragged and dropped directly onto the AttacheCase icon.
FIX Fix the problem that the overwrite confirmation dialog during decryption appeared inconsistently.
FIX Fix the problem that the plaintext password was displayed even when password masking was disabled during encryption.
FIX Fix the problem in which strings were not being displayed correctly even when passwords were set to be entered without being hidden during encryption.
FIX Fix the problem that some operations were not being deleted after encryption/decryption processes even though they were set to move to the Trash Bin.
FIX Fixed the problem that prevented proper processing when encrypting a folder that contains a junction or a symbolic link.
FIX Change the specification so that junction and symbolic link folders are excluded from encryption.
2024/02/29（ver.4.2.4.0）
NEW Add a setting to launch in normal window size instead of maximized in tablet mode.
NEW Add a setting to allow the creation of self-executable files exceeding 4 GiB.
NEW Add a setting to prompt the user when a self-executable file is likely to exceed 4 GiB.
IMPROVEMENT Add settings to limit executable file size on Windows, since files larger than (4 GiB − 1 byte) cannot be executed.
IMPROVEMENT Update the installer to display a "Commercial Use License Agreement" and require user agreement.
IMPROVEMENT Prompt the user to confirm whether to continue if the file hash differs from the pre-encryption value during decryption.
FIX Fix a problem where some devices failed to launch in tablet mode due to a window display error.
FIX Fix an exception error when trying to encrypt an XML file that is not in public/private key format.
FIX Fix a problem in which setting the number of times to fill in random numbers or zeros in the complete deletion setting sometimes did not work correctly.
FIX Fix a problem in which some original files/folders remained in a 0-byte or empty state after encryption or decryption when using the complete deletion setting.
FIX Fix a problem in which the command line argument "/ow=0", which does not display the overwrite dialog, did not work correctly during the decryption process.
FIX Fix a problem where two entries were registered in the Windows uninstaller list when both English and Japanese versions were installed.
FIX Fix the AttacheCase icon not displaying correctly in "Programs and Features" in the Windows Control Panel.
FIX Fix a problem where the language selected in the installer was not applied to the next launch of AttacheCase.
FIX Fix a problem where self-executable files targeting .NET Framework 4.0 or 4.6.2 were not output correctly.
FIX Fix a problem where message dialogs occasionally appeared behind the main window when "always on top" was enabled.
FIX Correct various typos in behavior settings (primarily in the English UI).
2023/03/08（ver.4.2.3.0）
IMPROVEMENT EV code signing certificates are now appended to each executable file, including the installer.
FIX Change the default compression setting from "No compression" to "Optimal" on first startup.
FIX As a security countermeasure, change the DLL used for Windows API icon-refresh calls to be loaded each time instead of cached.
2022/05/16（ver.4.2.2.0）
IMPROVEMENT Separate settings for AttacheCase#3 and AttacheCase4, which previously shared the same configuration.
FIX Fix a problem where uninstalling AttacheCase#3 after installing AttacheCase4 would also remove shared settings. Each version now manages its settings independently.
FIX Update the installer/uninstaller (Inno Setup v6.2.1) with enhanced protection against DLL preloading attacks.
2022/04/28（ver.4.2.1.0）
IMPROVEMENT Add command line argument (/lc=[PATH]) to import or remove a registration code from a text file.
FIX Change the registration code input so that the code is saved to the registry only when the OK button is clicked, not immediately on paste.
2022/04/21（ver.4.2.0.0）
IMPROVEMENT Re-target the application from .NET Framework 4 to .NET Framework 4.6.2, as Microsoft will end support for .NET Framework 4.6.1 and earlier on 2022/04/26.
IMPROVEMENT Self-executable files now default to .NET Framework 4.6.2 (configurable in Settings), though older OS compatibility is not guaranteed.
IMPROVEMENT Allow deleting a registered commercial license by right-clicking the license display in the version information dialog.
FIX Fix a problem where the "Delete original files after encryption" and "Delete encrypted file after decryption" settings were not applied.
FIX Refresh the icon cache after deleting an encrypted file post-decryption to prevent stale icons in rare cases.
2022/03/30（ver.4.1.0.0）
FIX Fix a vulnerability that could allow arbitrary code execution via a maliciously crafted "dwmapi.dll" placed alongside AttacheCase.exe.
FIX Fix a DLL hijacking (DLL preloading) vulnerability in the self-extracting archive and AttacheCase.exe.
2021/12/20（ver.4.0.2.7）
IMPROVEMENT Change INI file import behavior so that imported settings are saved to the registry only, not written back to the INI file.
IMPROVEMENT Review INI file handling in behavior settings and allow previously dismissed confirmation dialogs to be shown again.
IMPROVEMENT Add "Discard temporary settings and load from the registry" button in [Settings]->[Import/Export]
FIX Fix the problem where the "Show a dialog box to confirm always" checkbox could not be turned on in [Settings]->[Import/Export]
FIX Fix the problem where the button to replace the temporary settings with the current settings was not working in [Settings]->[Import/Export]
FIX Fix a problem where the dialog title that appeared when clicking the "Decrypt" icon in the main window was not correct.
2021/11/26（ver.4.0.2.6）
FIX Fix the problem where, due to a fix in the previous version, when encrypting multiple files at the same time, the second and subsequent files could not be encrypted and an error would occur.
2021/11/18（ver.4.0.2.5）
FIX Fix an unexpected error when pressing Cancel in the overwrite confirmation dialog during decryption.
FIX Fix a problem where encrypted files from the macOS version could not decrypt folders properly.
2021/11/04（ver.4.0.2.4）
IMPROVEMENT Allow the RSA key display dialog to be closed with the Esc key.
FIX Fix reading of public and private key XML files encoded in UTF-8 without BOM.
2021/10/17（ver.4.0.2.3）
FIX Fix a problem where setting "Always use the same encrypted file type" to "*.atc" caused the decryption process to run encryption instead, resulting in an error.
2021/08/18（ver.4.0.2.2）
FIX Fix the problem in which changing the "Compression" setting was not reflected correctly.
FIX Fix the problem where the panel would reappear in English after changing the behavior settings in a Japanese display environment.
2021/07/13（ver.4.0.2.1）
FIX Fix the command line argument "/complv" not working properly. Also fix compression not being applied when encrypting certain files.
FIX Fix the command line argument "/de" not switching to explicit decryption mode.
2021/07/11（ver.4.0.2.0）
NEW Add a "Restore to default settings" button in the General section of operation settings.
IMPROVEMENT Improve the decryption process to create folders as much as possible even when encountering invalid paths.
FIX Fix a problem where files could not be decrypted when encrypted with the "Create one encrypted file from files" option.
FIX Fix compression settings not being applied during encryption. The compression options are now simplified to three levels: "None", "Fastest", and "Optimal".
FIX Fix a problem where root directory files could not be decrypted due to incorrect path storage during encryption.
FIX Fix the progress display not correctly showing error status during encryption.
FIX Fix the "Set encrypted file name automatically" setting not being disabled when the command line argument "/autoname" has no value.
2021/07/07（ver.4.0.1.0）
FIX Fix an exception error on startup when running AttacheCase on Windows 10 Enterprise LTSC due to failure to retrieve the system color.
2021/07/03（ver.4.0.0.9）
FIX Fix a problem where the INI file could not be imported from "Import/Export".
FIX Fix an error that prevented decryption when a password file was configured.
2021/07/02（ver.4.0.0.8）
NEW Promote ver. 4.0.0.7 beta to the official version.
2021/06/30（ver.4.0.0.7β）
NEW Re-signed the executable and installer with a new code-signing certificate.
2021/06/23（ver.4.0.0.6β）
IMPROVEMENT Fix self-executable files not decrypting correctly when they contain a 0-byte file.
2021/06/22（ver.4.0.0.5β）
FIX Fix the problem where encrypted files could not be decrypted if they were folders only or contained 0-byte files.
FIX Fix some untranslated strings in the Japanese UI.
2021/06/21（ver.4.0.0.4β）
IMPROVEMENT Display the GUID by default when a private key is dragged and dropped.
FIX Remove the leftover password ZIP option from "Save" → "Always use the same encrypted file type".
FIX Fix a problem where the "Always use the same encrypted file type" setting under "Save" could not be accessed.
FIX Replace the leftover password ZIP icon on the password input screen with the public key encryption function.
FIX Fix the password strength meter not functioning (zxcvbn.dll was missing).
FIX Fix various unexpected errors, such as when canceling after password entry or selecting a file to encrypt from the menu.
FIX Fix debug console log output appearing in release builds.
2021/06/13（ver.4.0.0.3β）
NEW Implement public key cryptography (encryption/decryption using this feature requires ver. 4.0.3 or later).
FIX Fix an "Unexpected error" when encrypting with the password file function.
FIX Remove the password ZIP settings and clean up related leftover code.
2021/06/04（ver.4.0.0.2β）
FIX Fix a problem where the UI language could not be set to Japanese.
FIX Remove the leftover password ZIP icon.
2021/06/01（ver.4.0.0.1β）
FIX Fix self-executable files not being output correctly.
FIX Fix a problem where password visibility was inverted in self-executable files (the mask checkbox logic was reversed).
FIX Fix copyright notices displayed in self-executable files.
2021/05/21（ver.4.0.0.0β）
IMPROVEMENT Redesign the encrypted file structure from ver. 4, including switching from Rijndael to AES as the encryption algorithm.
IMPROVEMENT Change the internal file checksum from SHA-1 to MD5 to improve encryption/decryption speed.
IMPROVEMENT Improve speed by serializing file/folder metadata as binary data instead of strings.
IMPROVEMENT Add dark mode support.
IMPROVEMENT Add "/theme" command line option.
IMPROVEMENT Remove the breadcrumb navigation display.
IMPROVEMENT Remove the password-protected ZIP creation feature.
Version 3
2022/04/22（ver.3.7.0.3）
FIX Fix the "Delete original files after encryption" and "Delete encrypted file after decryption" settings not being applied.
FIX Refresh the icon cache after deleting an encrypted file post-decryption to prevent stale icons.
2022/04/13（ver.3.7.0.2）
FIX Fix a regression where the Windows 7 compatibility fix broke functionality on Windows 10 and later.
FIX Fix the "Do not display this dialog box again" checkbox not being enabled in the INI file load confirmation dialog.
2022/04/06（ver.3.7.0.1）
FIX Fix a compatibility issue preventing operation on Windows 7 and earlier.
2022/03/30（ver.3.7.0.0）
FIX Fix a DLL hijacking (DLL preloading) vulnerability in the self-extracting archive and AttacheCase.exe.
2021/03/25（ver.3.6.1.0）
IMPROVEMENT Save file creation and modification dates in a locale-independent format within encrypted files.
FIX Fix decryption errors caused by incorrect date conversion when decrypting in a different OS locale.
2021/02/28（ver.3.6.0.0）
NEW Redesign the application icons to make them more distinguishable from file icons.
IMPROVEMENT Improve encryption/decryption speed by approximately 1.2× by optimizing progress indication with timer control.
IMPROVEMENT Add a breadcrumb navigation at the top of the window.
NEW Replace an icon in the main menu.
IMPROVEMENT Add a developer console for debugging.
FIX Properly dispose of objects when encryption/decryption finishes.
FIX Fix an internal issue where English and Japanese resources were not properly separated.
FIX Change the .atc file association icon from the main icon to a secondary icon.
2021/02/16（ver.3.5.4.1）
IMPROVEMENT Add a command line option to interpret relative paths within absolute paths.
IMPROVEMENT Improve to display a warning message when the file association tool (AtcSetup.exe) is launched by itself.
FIX Fix the problem that prevented the "Check for program updates..." in the version information from being retrieved updating information properly.
2020/06/11（ver.3.5.4.0）
IMPROVEMENT The encryption and decryption processes are sped up (in particular, the process of calculating the SHA-256 value of the file was reviewed and sped up).
2020/04/15（ver.3.5.3.0）
FIX Fix the problem that command line option arguments were not interpreted correctly when capitalized.
FIX Fix the problem that AttachéCase freezes (infinite loop internally) when the file name was specified using the command line option "/autoname" when there was a file with the same name in the same place.
FIX Fix the problem that an "Unexpected error" occurred when encrypting multiple files with the "Create one encrypted file from files" option and the process did not finish successfully.
FIX Fix the problem that the icon of the encrypted file is not displayed when setting the file association with ver.3.5.2.0 (released on 2020/03/17).
2020/03/17（ver.3.5.2.0）
NEW Add an option to always turn on the IMEs of the password input text box. 'Settings' -> 'Window' -> 'Turn on IMEs in all text box for password entry'.
FIX Fix the problem where the mask display of the text box for entering some passwords was turned off.
FIX Fix the problem where an exception occurred when a value exceeding the percentage maximum value of the progress bar was entered.
FIX When the old version of the program files remained, translations such as Japanese were sometimes unsuccessful, so when installing the new version, the installer delete them if confirmed those old files.
2020/01/08（ver.3.5.1.0）
IMPROVEMENT Fix the problem that an error dialog may be hidden behind the main window during encryption or decryption if depending on setting of window.
IMPROVEMENT Along with the above bug fixes, when an exception was thrown in FileEncrypt3.cs, ZipEncrypt.cs, FileDecrypt2.cs, and FileDecrypt3.cs, the error dialog box displayed using System.Form.Window has been deleted in the source codes. And then All exception errors were returned to the main window such as Form1, and the UI messages has become to display there.
NEW Fix the problem where the decryption destination drive free space was not checked before decrypting the ver.2 encrypted file.
FIX The layout and design of the main form were reviewed and adjusted slightly.
FIX Fix the problem that the password will not reveal even if "Not mask password character" is checked when you enter the password for "Remember password for encryption" or "Remember password for decryption" in "Operation settings"-> "Password".
FIX Add new buttons of "Online Help" and "Command-Line Reference" in the operation setting window to launch a browser and jump to the web site URL.
FIX Fix that the source code of "Decrypt3.cs" to match the error code internally for the executable format.
FIX Fix the problem where switching language was not performed correctly in a Japanese environment, such as when "Default" was selected for language switching.
FIX Fix the process that the installer downloads automatically when .NET Framework 4.0 is not installed on the OS.
FIX Fix the problem where Japanese translation of the encrypted file association tool "AtcSetup.exe" did not work well.
2019/07/11（ver.3.5.0.0）
NEW Add password strength meter (Dropbox's zxcvbn library)
NEW Apply a new code signing certificate to all executable files.
IMPROVEMENT Add a function to run AtcSetup.exe standalone and remove all AttacheCase registry entries.
FIX Remove unnecessary code in UTC timestamp processing during decryption.
FIX Fix a problem where files with a destruction count set due to password errors were not correctly deleted.
FIX Fix a problem where the file list specified via the "/list" command line option could not be read if encoded in anything other than UTF-8.
FIX Fix an unexpected error when a command line option value contains an "=" character.
FIX Fix the "/nohide" command line option not working properly.
2018/10/10（ver.3.4.1.0）
IMPROVEMENT Merge DLL files into a single AttacheCase.exe executable for easier distribution.
IMPROVEMENT Allow the overwrite confirmation dialog to be closed with the Esc key.
IMPROVEMENT Prioritize manually entered passwords over memorized passwords.
FIX Fix the input text box being disabled in the memorized password settings.
FIX Fix a problem where files encrypted with ver. 2 were treated as "invalid path" and could not be decrypted.
FIX Fix an error message appearing when multiple instances of AttacheCase were started and closed.
2018/08/30（ver.3.4.0.0）
FIX Apply additional fixes for the previously insufficient directory traversal countermeasures.
FIX Add a countermeasure against a vulnerability that allows arbitrary script execution when decrypting an ATC file if a maliciously crafted "_AtcCase.ini" file is present.
2018/08/05（ver.3.3.0.0）
FIX Fix additional directory traversal vulnerabilities.
FIX Other minor fixes.
2017/07/28（ver.3.2.3.0）
IMPROVEMENT Add a UTC timestamp to encrypted files.
NEW Add an "Ignore file hash value check" option to "Salvage data".
FIX Fix the "Salvage data" option not working correctly.
FIX Fix a problem where the original file at the decryption destination was unintentionally destroyed when selecting "Cancel" in the overwrite confirmation dialog.
2017/06/23（ver.3.2.2.6）
NEW Update the code signing certificate.
IMPROVEMENT Apply the code signing certificate to the uninstaller as well.
IMPROVEMENT Prioritize UTF-8 processing when ver. 2 encrypted data contains both Shift-JIS and UTF-8 file lists.
FIX Add an option to replace invalid file/path name characters when decrypting ver. 2 encrypted data.
2017/06/05（ver.3.2.2.5）
FIX Fix a problem where creating a password ZIP with the "Create one encrypted file from files" option did not work correctly.
2017/04/28（ver.3.2.2.4）
FIX Fix the programs (AttacheCase.exe, AtcSetup.exe) not being digitally signed.
2017/04/28（ver.3.2.2.3）
FIX Fix a recurring problem where files encrypted with ver. 2 could not be decrypted correctly.
2017/04/27（ver.3.2.2.2）
FIX Fix a problem where folders (containing multiple files) encrypted with ver. 2 could not be decrypted correctly.
2017/04/26（ver.3.2.2.1）
FIX Fix a problem where encrypted files could not be decrypted when a Shift-JIS password was used with ver. 2 data.
FIX Fix a problem where read-only files encrypted with ver. 2 could not be decrypted.
FIX Fix the password input limit not being set correctly in encrypted files (previously, the default of 3 attempts was always applied regardless of the setting).
2017/03/24（ver.3.2.2.0）
IMPROVEMENT Update internal resources.
IMPROVEMENT Update the revision number for stable release.
2017/03/09（ver.3.2.1.7）
FIX Fix an exception error when creating a password ZIP with the "Save encrypted files to the same folder" option.
FIX Fix the default "month" format in "Set encrypted file name automatically" being incorrect.
2017/03/08（ver.3.2.1.6）
IMPROVEMENT Improve the error message clarity for access-denied errors during encryption or password ZIP creation.
FIX Fix a problem where selecting password ZIP and then encrypting incorrectly triggered the decryption process.
FIX Fix the status display showing "decrypting" when the file was actually being deleted.
FIX Fix an incorrect error message when trying to encrypt an Excel file.
FIX Fix various typos in the English settings window.
2017/02/28（ver.3.2.1.5）
FIX Fix the decryption progress not displaying correctly on Windows 10.
FIX Fix the file association icon not displaying properly.
2017/02/27（ver.3.2.1.4）
IMPROVEMENT Fix the Cancel button not working during decryption.
IMPROVEMENT Improve the error message when an access-denied exception occurs.
IMPROVEMENT Reduce the number of decimal places in the processing percentage display.
FIX Edit parts of the source code for Windows Store compatibility.
2017/02/02（ver.3.2.1.3）
FIX Fix serial numbers not being assigned to each file with the "Set encrypted file name automatically" option.
2017/01/19（ver.3.2.1.2）
FIX Fix the "Set encrypted file name automatically" option not being applied correctly from the command line.
2017/01/18（ver.3.2.1.1）
IMPROVEMENT Fix command line options being ignored when AttacheCase was launched via "_AtcCase.ini".
FIX Fix a bug in reading passwords from the INI file.
FIX Rename the option "Specify the format of the encryption file name" to "Set encrypted file name automatically".
FIX Fix problems with the format input in "Set encrypted file name automatically".
FIX Suppress the parent folder name dialog when both "Create one encrypted file from files" and "Set encrypted file name automatically" are enabled.
2017/01/12（ver.3.2.1.0）
IMPROVEMENT Fix a directory traversal vulnerability where files could be extracted to unintended directories when decrypting a maliciously altered encrypted file.
FIX Fix an access-denied error occurring when folders with the same name overlap while both "Create one encrypted file from files" and "Create no parent folder in decryption" options are enabled.
FIX When decryption fails with an incorrect stored password, no longer prioritize the stored password on retry so the user can enter the correct password.
2017/01/06（ver.3.2.0.4）
FIX Fix a decryption failure when encrypted files contain 0-byte files or empty folders.
2016/11/13（ver.3.2.0.3）
FIX Fix a problem where encrypted files in the root directory could not be restored correctly (present since before ver. 3.2.0.1).
2016/11/02（ver.3.2.0.2）
IMPROVEMENT In the overwrite confirmation dialog, immediately proceed when a different option is selected from the pull-down menu.
IMPROVEMENT Handle the "Skip All" button in the overwrite confirmation dialog with the same flow as cancellation.
FIX Fix an error when decrypting a root-directory-encrypted file in a different directory.
FIX Fix message dialogs being hidden behind the main window when "always on top" is enabled.
2016/11/01（ver.3.2.0.1）
FIX Fix self-executable format being the default when encrypting with initial settings.
FIX Fix the file destruction option not functioning.
FIX Fix the "After decryption, open the associated files or folder" option not functioning.
2016/10/31（ver.3.2.0.0）
IMPROVEMENT Minor version update.
IMPROVEMENT Add "Overwrite All", "Keep Newer", "Keep Newer All", "Skip", and "Skip All" options to the overwrite confirmation dialog.
FIX Fix a problem where the "without confirming" option for memorized passwords was not applied during encryption/decryption.
FIX Fix the "Passwords Option" not being used in the English version.
FIX Fix password input not being accepted after using a password file.
2016/10/28（ver.3.1.1.3）
IMPROVEMENT Fix "self-executable output" not working via command line option.
FIX Prevent command line options "/front" and "/wmin" from coexisting (the latter now takes precedence).
FIX Fix the overwrite confirmation dialog not skipping the file when "No" is selected during decryption.
FIX Fix errors when encrypting or decrypting read-only files.
2016/10/26（ver.3.1.1.2）
FIX Fix processing errors when launched with command line options.
FIX Fix a bug where "The latest version is released!" always appeared when checking for updates after a fresh install.
2016/10/24（ver.3.1.1.1）
IMPROVEMENT When 'Set the timestamp of encryption file to original files or directories' option is ON, not the whole, and to hold the time stamp of the first file or folder for each processing.
FIX Modified so that if you gave an explicit 0 to flag variables on the command line options, are given properly FALSE setting.
Version 4
2026/02/17（ver.4.3.0β）
NEW Full rewrite from scratch, supporting .NET10, and ensuring compatibility with macOS 26(Sonoma) and 15(Ventura).
2023/05/10（ver.4.2.1）
FIX Fix the problem where the public and private key generation buttons were not working and the respective files were not being output.
FIX Fix the problem with macOS Ventura where the dialog to grant permissions to folders under the sandbox no longer appeared and encryption/decryption was canceled.
FIX Fix the problem in which the window display position and size were not saved and were displayed in the same location each time it was launched.
2022/08/07（ver.4.1.9）
FIX Fix a bug that prevented decryption of files encrypted with older versions (ver. 3 or earlier).
2021/12/14（ver.4.1.8）
IMPROVEMENT Significantly improve the UI.
2021/11/17（ver.4.1.7）
FIX Link platform libraries for App Store submission.
2021/11/14（ver.4.1.5）
IMPROVEMENT Improve so that the OK button is displayed instead of the Cancel button when the encryption/decryption process is completed.
FIX Fix the problem that caused unintended behavior such as an error when specifying a different folder when the save dialog appeared according to the Sandbox security policy.
FIX Fix the problem where folders were not decrypting properly.
FIX Fix the problem that caused an error when "No" was selected in the overwrite confirmation dialog.
FIX Fix the problem where the associated startup of "*.atc" files, etc. Was not working properly.
FIX Fix the problem where if dragging and dropping a password file into the window the OK button is not enabled.
FIX Fix the problem where the encrypted file was recognized as a password file when the private key was loaded after the encrypted file was loaded first.
2021/08/03（ver.4.1.0）
IMPROVEMENT Remember previously authenticated directories under the Sandbox security policy, so the save dialog is not shown every time.
IMPROVEMENT Add a menu item to reset the list of authenticated directories.
FIX Fix a crash when re-opening the window after canceling encryption/decryption and closing the window.
FIX Fix a problem where the user could not retry password entry after entering an incorrect password during decryption.
FIX Add error handling when the password input attempt limit is exceeded.
2021/07/13（ver.4.0.8）
FIX Remove an unnecessary "Print" menu item.
FIX Change the linker behavior to link platform libraries for App Store review compliance.
2021/07/02（ver.4.0.6）
NEW Promote ver. 4.0.5β to the official release.
2021/07/02（ver.4.0.5β）
FIX Revise the file open/save process to comply with Apple's Sandbox policy.
FIX Fix encryption/decryption failures caused by public key and encryption key issues.
FIX Fix a display issue when returning to the start screen after loading public/encryption keys.
FIX Fix an error when loading public/encryption keys, canceling, and then loading them again.
2021/06/23（ver.4.0.3β）
FIX Fix the problem where encrypted files could not be decrypted if they were folders only or contained 0-byte files.
FIX Fix and reorganize non-functional items in the top menu.
2021/06/22（ver.4.0.2β）
FIX Fix a problem where returning to the start screen after encryption/decryption and performing a different operation did not work correctly.
FIX Fix the "Generate Key" button not functioning properly.
FIX Fix the "Generate Key" button disappearing when returning to the start screen after encryption/decryption.
2021/06/17（ver.4.0.1β）
NEW Add public key cryptography support.
2021/05/21（ver.4.0.0β）
NEW Release.