SafeGuard LAN Crypt 3.95.1 Client release notes
The below listed platforms have been tested and
are officially supported. Other Service Pack levels might work as well but have
not run through a QA cycle and won´t be analyzed in case of occurring issues.
Windows 7 (Ultimate / Enterprise
/ Professional) SP1
(support added Oct 2016)
Windows 10 Build 1703 (Creators Update)
Windows Server 2012 R2
Citrix XenApp 7.9 on Windows Server 2012 R2
Compatibility with SafeGuard Enterprise
SafeGuard LAN Crypt 3.95.1 can be installed
together with SafeGuard Enterprise 7.0.2 or 8.0.
Please note that SafeGuard LAN Crypt 3.95.1 cannot be used
together with SafeGuard Enterprise Synchronized Encryption or the File
Encryption module from SafeGuard Enterprise Location Based File Encryption.
These features have to be removed before SafeGuard LAN Crypt can be installed.
LAN Crypt can be used together with the Data Exchange (DX) and Cloud Storage
(CS) modules from SafeGuard Enterprise.
LAN Crypt clients version 3.71.64 or newer can
be upgraded to version 3.95.1 on the supported platforms.
- Windows 10 Creators Update
- Integration of bugfixes
- Citrix Terminal Server
- Client Drive Redirection
Encryption of files on client drives mapped on
a Citrix Terminal Server is not supported and these drives will be
ignored by the SafeGuard LAN Crypt encryption filter driver.
- Streamed applications not
Citrix application streaming is not supported.
- Virus scanners
- Virus scanner services
Virus scanner services need to be explicitly
allowed to have access to encrypted files in order to be able to find
Tested virus scanners
The following virus scanners have been tested with
the SafeGuard LAN Crypt Client:
Sophos Endpoint Security and Control, Version
Sophos Endpoint Security and
Control, Version 11.3.1 Cloud
McAfee Endpoint Security 10.2
Symantec Endpoint Protection 12.1.6
Trend Micro Antivirus+ 11.0.1158
Configuration of other virus scanners
(not tested with this release):
Symantec Endpoint Protection 11.0.6 MP1
Microsoft Security Essentials 4.0.1526.0 or
Microsoft Forefront client
- Known issues
- There is an issue with Sophos
Anti-Virus that may cause encrypted files to be locked (either only for
write or for read and write access). This is caused by a timing issue of
Sophos Anti-Virus if the on-access scanning level is set to 'intensive'.
- There is an issue with Sophos
Anti-Virus that may lead to damaged Microsoft Office documents when
saving them in a folder that is made available when offline
(“OfflineFolder”). To avoid this issue please configure the Sophos
Anti-Virus on-access scanner to exclude the folder “C:\Windows\CSC”.
- On a SafeGuard LAN Crypt
Client in combination with Symantec Endpoint Protection 11 and Office
2003 a BSOD may occur when a document is saved on an USB stick. With
Symantec Endpoint Protection 11.0.5 (11.0.5002.333) the BSOD does not
- After receiving a new virus
scanner executable via the policy file, the client has to be rebooted.
- If McAfee Endpoint Security
10.2 and SafeGuard LAN Crypt 3.95 are installed on the same
machine, Windows 7 clients stop booting with a pulsating windows logo.
- If TrendMicro AntiVirus+ and
SafeGuard LAN Crypt 3.95 are installed on Windows 7, it may happen that
the LAN Crypt profile cannot be loaded. As a workaround, the folder for
the policy file cache (default "%LOCALAPPDATA%\Utimaco\SafeGuard
LAN Crypt\Local Policy Cache") must be excluded from the virus
- Domain-based DFS
In a domain-based DFS, you can access the DFS
either via the server name or via the domain name.
The encryption rules must always be created in
the same way as used to access DFS.
If the DFS is accessed via the server name, the
encryption rule must be based on a server name. If DFS is accessed via
the domain name, the rule must be domain name based.
If you want to access the DFS both ways, you
must define two encryption rules, one with the domain name and one with
the server name.
Y: is mapped to \\DOMAIN\DFSROOT
Z: is mapped to \\SERVER.DOMAIN\DFSROOT
- Nested DFS links
Nested DFS links (DFS links to other DFS links
or DFS roots) can be used but encryption rules must not include a
physical path to the DFS link and there are some known problems in
combination with persistent encryption. When copying an encrypted file to
a plain folder it may become decrypted. When moving encrypted files to an
ignored/excluded folder it may stay encrypted.
- Rules using IP address not
it is not possible to use rules for DFS that
contain the IP address of the server hosting the DFS share.
- DFS and persistent encryption
When copying encrypted files to ignored or
excluded folders on DFS drives they may not be stored decrypted.
- Viewing folders in Windows
Viewing folders on a DFS share cause problems
that either the display takes very long or the folder selection jumps to
the root folder after a while.
In this case the following registry value can
A reboot is necessary to activate the change.
Afterwards the Windows overlay icons for shared folders and links are not
displayed if a SafeGuard LAN Crypt overlay icon is displayed.
- Network Attached Storage (NAS)
In general, SafeGuard LAN Crypt will operate
with network shares hosted on NAS devices. If it is planned to use a NAS
device, Sophos recommends the execution of intensive tests prior to using
SafeGuard LAN Crypt in a productive environment.
However, due to various SAMBA implementations
and versions, not every NAS device will act like a Windows Server.
Protocol variations are possible and therefore a few special cases might
not work properly in combination with SafeGuard LAN Crypt; for example, a
user’s “my documents” folder might not be encrypted on a filer share.
Therefore Sophos does not guarantee that encrypted file shares on NAS
devices will work in every condition and only provides limited support in
cases where issues arise.
- Volume mount points
SafeGuard LAN Crypt does not support volume
mount points. (An encryption rule for a directory that is a volume mount
point will not work.)
The same is true for virtual drives generated
with the SUBST.exe command.
- EFS encryption and NTFS
SafeGuard LAN Crypt encrypted files cannot be
(additionally) EFS encrypted or NTFS compressed.
It is possible to EFS decrypt (provided that the
EFS key is available) and/or NTFS decompress files during initial
- NTFS rights
While Windows is able to create new files or
copy files to a folder where the NTFS rights
- Traverse Folder / Execute File
- List Folder / Read Data
- Read Attributes
- Read Extended Attributes
- Create Files / Write Data
- Read Permissions
are granted to a user, the following additional
rights have to be granted if there is an encryption rule on a folder:
- Create Folders / Append Data
- Write Attributes
- Write Extended Attributes
- Backup programs
Backup programs should be configured as
unhandled applications. If you do this, the files will retain their
encryption state after a restore. The backup applications from Windows 7
and higher are automatically treated as unhandled application.
The backup target files themselves must not be
encrypted, because they cannot be restored by the backup application as it
does not decrypt the backup files. Because the files included in the
backup are already encrypted, it is not necessary to encrypt the backup
target files itself.
- Configuration data
Because the client reads the configuration data
from the Registry during the boot and login process, you may need to
reboot the PC to include any changes to this data.
- SafeGuard Enterprise Data
- Profile without key causes
problem with SafeGuard Enterprise DX
There is a known problem when SafeGuard LAN
Crypt and SafeGuard Enterprise Data Exchange are installed. If a
SafeGuard LAN Crypt profile without a key is loaded, it is not possible
to open or create new files that are SafeGuard Enterprise DX encrypted.
Workaround: Instead of providing an empty dummy
profile for users who shall not encrypt data using SafeGuard LAN Crypt,
please disable the error message that no profile was found (“SilentMode”)
using a group policy.
- Default Ignore Rules not active
after user logon with SafeGuard Enterprise DX
Please note that SafeGuard Enterprise Data
Exchange suppresses SafeGuard LAN Crypt Default Ignore Rules after user
logon, even if no SafeGuard LAN Crypt user profile is loaded. The Default
Ignore Rules are active during system boot but as soon as the user logs
on to the system and SafeGuard Enterprise DX is active they become
disabled. This is always the case, even if there are no DX policies.
- SafeGuard Enterprise DX
If the encryption priority is changed from SGLC
to SGNDX, after the next reboot the SafeGuard Enterprise DX encryption
wizard starts to re-encrypt files on removable media which were encrypted
by SafeGuard LAN Crypt before. This operation fails, because the
SafeGuard LAN Crypt keys are not loaded at this time.
After the SafeGuard LAN Crypt profile was
loaded, the re-encryption is possible.
- SafeGuard PrivateDisk
SafeGuard LAN Crypt cannot be used to encrypt
SafeGuard PrivateDisk volume files (*.vol).
- CD burning
- Burning encrypted CDs with
Windows Explorer built-in mechanism
To create a CD with SafeGuard LAN Crypt
encrypted files, use a separate burning application that you must add to
the list of unhandled applications. All encrypted files remain encrypted
if you now burn them onto a CD.
As the Windows native burning tool is
implemented as an Explorer Extension, you cannot use this tool for
creating encrypted CDs (you would have to specify Explorer as an
unhandled application, which has a huge number of unwanted side effects).
- Known problem with Nero InCD
There is an issue with Nero InCD and Office
2003 together with SafeGuard LAN Crypt when encryption rules are set for
the CD drive. If an Office 2003 file is stored on the CD a BSOD may occur
during processing the file (e.g. open, save).
User and administrator certificates must be
located in the current user’s certificate store. Certificates located in
the local computer’s certificate store cannot be used for SafeGuard LAN
- Windows 7 and higher
- Folder overlay icons
Overlay icons for folder icons in the left-hand
tree-view are sometimes missing.
- No key column in Explorer
It is no longer possible to have a column added
in Explorer that shows key names or GUIDs for encrypted files.
- Offline files
On some machines it may happen that some
encrypted offline files are not accessible in offline mode.
To avoid this problem please disable indexing
of offline files.
- UAC dialog on not accessible
If an encrypted file is renamed or deleted and
the corresponding key is not available in the SafeGuard LAN Crypt
profile, a User Account Control dialog is shown because the file is not
Providing credentials of an administrator does
not allow the file operation in this case, because even as administrator
the file cannot be modified as the proper key is not available.
- Offline Folders
If Windows Offline Folders are used it may
happen that not all files get synchronized if SafeGuard LAN Crypt is
installed. Subsequent synchronization requests should complete the
If the default location of the offline folder
cache (usually C:\Windows\CSC) is changed, an ignore rule should be set on
this folder (e.g. D:\CSC).
- Known problem with crypto.sys
The driver crypto.sys is shipped with different
products, like SafeNet Netscreen Remote, SafeNet VPN and others. There is
a known problem with this driver that can lead to a BSOD.
- Multiple smartcard PIN entries
When SafeGuard LAN Crypt is used together with
certain smartcard middlewares, e.g. Nexus Personal Edition 4.0.1, it may
happen that the user has to enter the smartcard PIN multiple times.
- Compatibility issues with
Downloading documents from a SharePoint server
may fail if there is an encryption rule set on the folder containing the
temporary internet files.
- Restricted support of short path
Following restrictions exist in relation to
short path names:
The path used in the encryption rule must exist
at profile load time (except paths on shares)
The path used in the encryption rule must not be
renamed after the profile was loaded, otherwise it may happen that the
short path name will not work anymore on this path
Only for absolute path rules the short path name
is also handled (relative path rules are only considered in the way they
are entered during profile creation)
- Encrypted applications on
If an executable file is started which is stored
encrypted on a network share, it may happen that the file remains to be
used, even if the application is no longer running.
To replace such files it is necessary to rename
the existing executable file at first and then copy the new file.
- User elevation for encrypted
If an encrypted executable or installation
package is started and requires a user elevation in Windows 7 or higher,
it may happen that the elevation doesn’t take place and the executable is
- Profile expiration
If the folder where the SafeGuard LAN Crypt user
profiles are stored is made available for offline access, the profile
expiration will not work if there is no network connection available.
- Deletion of files using
SafeGuard LAN Crypt prevents the deletion of
files which are encrypted and the user is not in possession of the proper
key. However if psexec.exe is used to connect to a machine where SafeGuard
LAN Crypt is installed, it is possible to delete encrypted files without
having the proper key. Opening encrypted files is not possible in such a
- Encryption rules on
Setting encryption rules on
%USERPROFILE%\AppData\Roaming may result in several error situations, as
some of these files (e.g. desktop background image) are already accessed
by Windows at a very early logon stage where the SafeGuard LAN Crypt
profile is not yet loaded.
In general it is not recommended to encrypt
files in this folder. Encryption will only work for files which are
accessed after the SafeGuard LAN Crypt profile was loaded.
- Multiple rules for the same
If more than one rule is defined for the same
target path (e.g. rule 1 for x:\*.*, rule 2 for y:\*.*, x: and y: are both
mapped to the same share), only the first matching rule according to the
current rule sort order is applied.
- Missing overlay icons
The number of different overlay icons is limited
by Windows, so if another application is installed which also uses overlay
icons (e.g. SharePoint extension in Microsoft Office) the SafeGuard LAN
Crypt overlay icons may disappear.
Please see the following knowledgebase article
how you can enable the overlay icons again: http://www.sophos.com/en-us/support/knowledgebase/108784.aspx
- When a shortcut to an web page
is right clicked, no SafeGuard LAN Crypt entry is visible in the Explorer
- Rules using IP addresses (v4/v6)
will only match if the network share was mapped using the IP address.
There is no DNS resolving done in the filter driver, so when the very same
network share is mapped using the server name, the rule will not match.
- Verification of the encryption
status using the Initial Encryption Wizard
- Encrypted files for which the
user has no key are counted as "failed to open" instead of
- Encrypted files which are
encrypted with an algorithm which is not the current configured one (e.g.
encrypted with XTS-AES, but configured is CBC), are reported as
"Encrypted with another key" instead of "Encrypted with
- Encryption of VHD (Virtual Hard
Disk) and WIM (Windows Imaging Format) files is not supported.
- Microsoft Virtual Desktop
Infrastructure is not supported.
- Client API
- The location of the client API
has changed from <Program Files (x86)>\Sophos\SafeGuard Shared to
<Program Files (x86)>\Sophos.
- Installation of the Client API
fails on Windows 7 64-bit if Sophos Endpoint 11.5 (managed by Central) is
also installed on the same machine
- Paths which are longer than
520 characters are not supported.
- If features are added or removed
from an existing installation, a warning dialog is displayed that this operating
system is not supported. This dialog can be ignored.