S/MIME signed email loses attachment
We have a small number of users who digitally sign (but don't encrypt) their email. When they send attachments, it usually works fine. However, when the recipient is using Outlook Mobile, all...
View ArticleIs it possible to sign a file using an ssh key?
I use SSH (OpenSSH 5.5p1 on Linux, to be precise). I have a key, on which i have a passphrase. I use this for the usual logging in to computers stuff.Can i also use it to sign files?As i understand it,...
View ArticlePreventing PDF document from having a digital signature added with long term...
I'm running into a new issue with PDF file sizes. It seems that Acrobat X and above now have by default enabled a preference called "Include Signature’s Revocation Status When Signing". Essentially...
View ArticleHow to digital sign Excel document with a P12 file
I have a few Excel documents we need to sign at my job. Also some PDF ones. I've looked everywhere and all sites shows an "easy" answer but all lead to the same: obtain a digital id from microsoft. On...
View ArticleCan multiple signed PDF files be merged into one?
It seems that the industry converged to the weird consensus where the digital signature of a file is stored in the file itself, on a crude imitation of paper documents. If I have a PDF document that...
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Email in Digital Signature
How do you add an email to your digital signature details? Digital signature details are found when a file is signed for instance by VeriSign. You then right-click on the file and choose "Digital...
View ArticleHardware digital signature
Is it possible to show how generate a digital signature, a checksum, or something along those lines based on your computer hardware using an Ubuntu Live CD?So, once the first digital signature is...
View ArticleWhy can't I sign a friend's GPG key, even though I can sign git commits and...
I'm trying to sign someone's GPG key, and keep getting a strange error:# for example$ gpg --sign-key cfeck@kde.org pub rsa2048/DBD2CE893E2D1C87 created: 2017-06-27 expires: never usage: SC trust:...
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How to add multiple digital signatures to an Excel spreadsheet?
I have an Excel spreadsheet that lives on a shared folder, that everybody can access. On that spreadsheet, I have a worksheet with a list of tasks that have to be completed, but not necessarily by the...
View Articleecryptfs: What would happen if we entered the wrong passphrase and continued...
Using ecryptfs, a fine file-system encryption mechanism on Linux.After the filesystem is setup with ecryptfs (ecryptfs is an overlay of the actual filesystem, like ext4. Files and directories name and...
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Windows Explorer file property does NOT show digital signature info for some...
For example, PEauth.sys on Windows 7 and 8.1. Windows Explorer file property dialog does not show Digital Signature tab for this file, but Sysinternal sigcheck.exe says it is digitally signed. Can some...
View ArticleHow to verify a digital signature on a PDF on Linux?
I am a Linux desktop user.Someone sends me a PDF file which is digitally signed. It is supposed to be signed using some kind of government / regulated body / official institution issued certificate.Is...
View ArticleIs there a certificate file containing an signature image?
Some PDF editors have this nice feature to sign your document and placing a scanned image of your signature at the same time. Is there any digital signature format out there supporting to contain an...
View ArticleCreate view-only backup and adding digital signature
I need to create a backup of a computer running Windows 10.Said backup needs to be read-only.I believe the program EaseUs allows that. If anyone can confirm, I’d appreciate it. I am used to Linux and...
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How to delete signature from a PDF
This PDF has an invalid signature, so I want to delete it. Is there some tools to do it? I use Windows/Linux system.PDF source: https://zh.z-library.se/book/3355492/93d409/classical-mechanics.html
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Error running installer in Windows 7 VM: "publisher of file [xxx] cannot be...
For various reasons, I need to install a third-party program on a Windows 7 VM running under Parallels Desktop 18 on a MacBook Pro running OS 12.6.1.The problem appears when I try to run the downloaded...
View ArticleAdding Multiple Digital Signature Fields in Adobe
I have a pdf multiple people need to digitally sign. I would like to "pre add" the signature fields to the pdf so that all the signature boxes are the same size and in the right place. Then when I send...
View Articlegpg: skipped "12345689": Unusable secret key / how to use signing subkey for...
As you see, I have a key with id 12345689, and I'm trying to sign with it in gitgpg -k/home/lz/.gnupg/pubring.kbx---------------------------pub rsa4096 2020-03-02 [C] 12345689uid [ unknown] Person...
View ArticleHow to fake handwriting on pdf without printer and scanner?
Bureaucracy sometimes requires us to print a document,fill in blank fields, sign it, scan it and send it back. Is there an easy way to fool the bureaucratswhen no printer or scanner are available? I...
View ArticleDelete the digital signature from a received Outlook message
My goal is to delete the digital signature in an Outlook message. My initial idea was to create a VBA script (which I have done below) to enumerate all attachments in the selected mail item and remove...
View ArticleUse an unsigned driver in Windows 7 x64
I'm trying to use the RBC9 SpaceNavigator TEST x64 build drivers for my SpaceNavigator 3d joystick so that it can work as a normal joystick in games like Quake.Unfortunately, I get the error "This...
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How to import a PNG signature into Adobe Acrobat Reader?
I've been trying to import my signature stored as a .png file into Adobe Acrobat Reader to sign PDF documents, but I can't find the "Add Signature" option. I've looked under "Fill & Sign" and even...
View ArticleError signing email with eID certificate using Outlook365
When I try to sign an email using Outlook365, I get an error message stating there is no email address associated with the certificate present on the eID smartcard (note: I can use my eID to sign Word...
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Adding a background image for signature Okular
I'd like to add an image to my signature. I've generated a certificate using Open-SSL, and it works. However, the signature in Okular repeats the name when I'd expect to be able to put my handwritten...
View ArticleInstall trusted certificate to verify PDF signature with pdfsig
I'm trying to use the pdfsig utility from Poppler to verify the signature of a certain PDF file. When I use it, it displays (some irrelevant info redacted):Digital Signature Info of:...
View ArticleSigning EXE with both SHA256 and SHA384 (and SHA1 ?) nowadays recommended?
My old build script has been saving multiple SHAs without problems for years.Nowadays, when the cert is located on USB TOKEN, the signtool does not seem to store multiple SHAs on EXEs, even when these...
View ArticleStrip signatures from PDFs without increasing the file size, on Linux
I have multiple digitally signed PDF payslips from my ex employer, and I want to merge them together into one. I don't care about the signatures: either retaining them or signing the merged...
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Remove trust from built app package file once added to windows trusted app
I created package of an app I developed. When running the built app it was blocked by windows. So I checked the Unblock from the properties as show in the below image.But Now I want to remove it from...
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Acrobat: transfer 'sign yourself' signature between laptops
Adobe Acrobat has a 'sign yourself' function that allows the use of signatures and initials:How do I transfer my 'sign yourself' signature from the old laptop to the new one?I'm in the process of...
View ArticleHow do I sign a file using SSH and verify it using a certificate authority?
I would like to give a selected number of developers ability to run code on a system, and verify it using OpenSSH's -Y verify feature.# Generate the certificates, and sign the dev cert with the root...
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