Questions tagged [digital-signature]
The digital-signature tag has no usage guidance.
216 questions
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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 ...
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Strip 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 document.
...
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Signing 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 ...
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Install 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: /<redacted>...
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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 ...
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Error 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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457
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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 & ...
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Adding 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. ...
Noah Callinan
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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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Create 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 ...
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Is 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 ...
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ecryptfs: What would happen if we entered the wrong passphrase and continued like that? Can we prevent encryptfs from accepting a wrong passphrase?
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 ...
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Can 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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How 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 ...
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Error running installer in Windows 7 VM: "publisher of file [xxx] cannot be verified"
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 ...
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Why can't I sign a friend's GPG key, even though I can sign git commits and messages just fine?
I'm trying to sign someone's GPG key, and keep getting a strange error:
# for example
$ gpg --sign-key [email protected]
pub rsa2048/DBD2CE893E2D1C87
created: 2017-06-27 expires: never ...
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How 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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182
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Create sample Microsoft Word document with invalid electronic signature
I'm involved in informal education of notaries public. I would like to create a sample Microsoft Word document with a valid electronic signature, made with a digital certificate. I would then like to ...
- 158
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Digital Signature for project
i want to know for me to sign digitally software(i am not a developer just an investor)
Do i need to use services like comodo or it can be done manually, for example i freelance soft like desktop app ...
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549
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How to resolve Signature Verification Results false positives?
I noticed that there are six DLLs in C:\Windows\System32 that sigverif.exe flags as not having been digitally signed - even though they have been. After digging into it a bit, it looks like the ...
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Do audiofiles contain digital footprint which enables to trace back to the PC where the audiofile got downloaded and edited?
I'm using windows10 os on my pc. so i downloaded few audio files from a website which needs my email to login. My first question is - how to see if those audiofiles contains my email which i used to ...
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How do you know if a code signing certificate for a file is ok?
Which things should you look out for, to indicate all looks okay, when viewing a downloaded file's "Digital Signatures" tab in Windows 10?
What are the signs there may be an issue with the ...
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121
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Does GpgOL attempt to grab public keys off a default keyserver?
I currently have a customer who noticed firewall logs pointing to a URL that was never used by them before. They blocked all traffic to and from the domain of another company that was recently hit by ...
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338
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DocuSign, User Certificates, and eIDAS
Based on my understanding in order to by eIDAS compliant, signer's digital certificate is included in the PAdES envelope.
However when i sign a document with DocuSign and open it with Acrobat reader, ...
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705
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How can I allow another user to move files around a shared folder in OneDrive?
I have setup a Shared folder on my Onedrive account for my team to facilitate document sign off however after a member of the team signs the document they can not move the document to the next persons ...
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44
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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 ...
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Microsoft Word: Digital Signature in document has "recoverable signature" error
I am trying to add a digital signature to a document in Microsoft Word for Microsoft 365 MSO (Version 2110). When signing, Word says:
The certificate you selected cannot be verified. Please check ...
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161
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Verify a digital signed document by fetching public key from local CA at the time of verification
Is it possible for a user (say A) to verify a digitally signed (by user B) document without having public key of user B in local system and fetching key from the server (local CA) at the time of ...
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How to enable CA_CERTIFICATES on manjaro so that openssl works (xanmod installation error) (solved)
I'm trying to install the XanMod kernel on a Manjaro machine, but receive errors:
$pamac build linux-manjaro-xanmod
...
scripts/sign-file.c:25:10: fatal error: openssl/opensslv.h: No such file or ...
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gpg: skipped "12345689": Unusable secret key / how to use signing subkey for gpg?
As you see, I have a key with id 12345689, and I'm trying to sign with it in git
gpg -k
/home/lz/.gnupg/pubring.kbx
---------------------------
pub rsa4096 2020-03-02 [C]
12345689
uid ...
- 141
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59
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Is it bad to use a let's encrypt certificate outside its scope?
I have a let's encrypt certificate issued for my website,
Since I have this certificate's private key, I could use it to sign other stuff like files, etc...
(Assuming I don't leak the private key, of ...
- 365
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291
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How to enable GitHub clone using SSL Certificate?
I am new to GitHub.
Is it possible to clone GitHub private repos using SSL certificate?
Is CLI operations to GitHub & GitHub APIs can be done using SSL certificates?
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Encryption issues (emails being encrypted for sender, not receiver) in Microsoft Outlook for Microsoft 365 MSO (16.0.13628.20234) 64-bit using S/MIME
I am trying to setup email encryption functionality.
I have created my own CA, 2 PFX certificates, and have signed the PFX certificates with the CA certificate.
The setup on both machines seem to be ...
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Can I use my own driver on Windows without having to ask MS for permission while keeping Secure Boot on?
As per the subject :
I want to write my own kernel mode driver
I want to be able to use it with Secure Boot on
I don't want to ask for permission to use it (no WHQL testing or attestation signing)
...
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Why Outlook client's S/MIME settings use SHA1 as the default Hash Algorithm for digital signing a message?
can someone tell why Outlook client S/MIME settings use SHA1 as the default Hash Algorithm?
Doesn't that put the certificate private key to a risk when weak algorithm is used? Or am I ...
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Libre Office Sign a PDF with PGP key
I'm currently facing an issue with the "Sign" feature of Libre Office. I can digital sign my ODT files without a problem. That means I can select my pgp key in the list of keys and sign the ...
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Verifying Veracrypt's public key
I execute the following command, as discussed in several sites:
gpg --with-fingerprint VeraCrypt_PGP_public_key.asc
Against current key here VeraCrypt download
The output I receive is as follows:
gpg:...
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Is it possible to download electronically signed document with a signature on it?
I am sorry if this is a wrong place to ask this. If it is, redirect me to the right site.
A document is electronically signed and sent me in .asice file. I managed to open the document via my ...
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How to verify a gpg-signed file against a specific public key?
Background information: I have a directory full of files and detached .asc signatures. I also have my default keyring which includes many public keys of people (some of whom I trust and others I don't)...
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What does the check mark `Lock document after signing` do in Acrobat Reader?
I need to sign PDF documents with the Acrobat Reader DC (V19, Win10).
What consequences does the check mark Lock document after signing specifically have? This is what I checked/got so far (partly ...
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Is my QUBES-OS master signing key right or wrong?
i just tried to verify my Qubes Master Signing Key with this description:
https://www.qubes-os.org/security/verifying-signatures/#1-get-the-qubes-master-signing-key-and-verify-its-authenticity
I ...
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OpenSSL Digital Signature with ES256
I am trying to reproduce a valid signature for the JSON Web Token.
I make the privat key with: openssl ecparam -genkey -name prime256v1 -noout -out private.pem
also convert this from Pem to P8 with: ...
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Device Driver Signing on Windows 10
I am not Windows users so I need some help with driver digital signature enforcement in windows 10 64 bits.
1) I have device driver which according Windows 10 doesn't have digital signature.
When I ...
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How to verify an email signature from Facebook?
Facebook allows users
to add OpenPGP public keys to their profile; these keys can be used to "end-to-end" encrypt notification emails sent from Facebook to your preferred email accounts. – ...
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Secure Boot - Custom signed bootloader
Through Secure Boot on Windows 10, I am trying to make it so that only a bootloader signed with my private key can boot on a machine. This means that even if someone else comes along with a Microsoft ...
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Word Signature Line: not all certificates from certmgr.msc/Personal/Certificates selectable?
In Microsoft Word you can add a signature line to a document. It is an item inside the document that initially looks like this:
Once you've added that signature line to the document you can double ...
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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 ...
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unknown tag 26 encountered bouncy castle exception
unknown tag 26 encountered
at org.bouncycastle.asn1.ASN1InputStream.buildObject(Unknown Source)
at org.bouncycastle.asn1.ASN1InputStream.readObject(Unknown Source)
at org.bouncycastle.asn1....
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Understanding an email with no SPF, DKIM, or DMARC but is has a valid digital signature
Can someone explain in simple terms what does it mean, that an email has no SPF, DKIM, or DMARC (from what I read and understood is that this email is likely to end up as as spam or rejected by the ...
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170
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Combine excel and keep signature line
I'm doing an excel and SharePoint project where I provide user with an excel file with a Microsoft signature line that user review and sign. These are separate files for each user and the files are ...
