Questions tagged [signature]

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Renew a self-signed certificate

Let's say I have a self-signed X.509 certificate: file some.bin some.bin: Certificate, Version=3, Serial=00ea5db390c4cc0de3, Issuer=Some Certificate, not-valid-before=2022-08-02 06:51:44 GMT, not-...
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Signature in Front is getting resized in Outlook

I am trying to create a signature in front. I was able to insert the image by saving it on the computer and uploading it. After messing around with the formatting it looks fine on Front. The problem ...
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1 answer
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How reliable is Window's verified publisher system?

I assume anyone can with some effort add their certificate under name X to their database, in that case, is there anything stopping a fake publisher from adding themselves with the name of a legit ...
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What does it mean when the publisher of an application is identified as Microsoft Corporation but then it is flagged as not verified?

I am using this utility called SysInternals which is like the task manager on steroids for the Windows operating system. I noticed that the publisher of certain applications is labelled as Microsoft ...
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2 votes
0 answers
33 views

Thunderbird Signature Switch - Sync signatures between different devices

When composing a message in Thunderbird I would like to easily turn on/off and choose between signatures but also sync my signatures between different devices. So far the Signature Switch add-on in ...
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1 answer
412 views

Gpg4win installer signature validation: how to fix "WARNING: This key is not certified with a trusted signature!"

I am following the install guide of "OpenPGP signatures" of Gpg4win at Check integrity of Gpg4win packages. Having also followed additional advice of how to import the Gpg4win public key ...
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1 answer
769 views

Openssl signed with openssl pkeyutl verified with openssl dgst

I want to sign hash with openssl pkeyutl and verify with openssl dgst -verify. Down below are my testing private and public keys (EC keys): private.pem: -----BEGIN EC PARAMETERS----- BggqhkjOPQMBBw=...
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17 votes
2 answers
3k views

What happens if a signature of a program expires?

Can the program still be installed after the expiration date of the signature? Or does it have to be signed again?
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1 vote
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Openssl DSA Signature Verification Failure Error not understood

I am given a public key in PEM format: -----BEGIN PUBLIC KEY----- MIIDRjCCAjkGByqGSM44BAEwggIsAoIBAQCPPVSofEh+2wGLK/1UOEbx7R5YgCp5 JVrhglBS2QZxdiYnl9JCHVuFQC/vOxFeNmP9GUxv1vcQ7Jjr0J26sdUDFg+dP3ZD ...
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2 votes
1 answer
96 views

Provide download repository with signed DEB-packages?

I provide an own download repository for Ubuntu DEB-packages. It comes with a directory structure in style https://mydomain.tld/download/Ubuntu/dists/bionic/main/binary-amd64/ The directory contains ...
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Disable Digital Signature Certification or issue a blanket certificate for all users on an InfoPath form?

We have some Time-Off request forms that are sent through InfoPath 2007 via e-mail and it goes down the verification line (e.g. Employee signs and it gets sent to their supervisor then it gets sent to ...
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8 votes
1 answer
4k views

Generating JWT RS256 signature with openssl

I'm trying to sign a JWT token with the RS256 algorithm using openssl. Take the following example token: eyJhbGciOiJSUzI1NiIsInR5cCI6IkpXVCJ9....
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1 answer
9k views

Trying to verify a download signature with PGP, but getting "no signed data" when passing in the .asc file?

I tried the following steps from Verifying Signatures on the Tor Project: gpg.exe --keyserver pool.sks-keyservers.net --recv-keys 0x4E2C6E8793298290 imported: 1 gpg.exe --fingerprint ...
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1 answer
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Outlook Signature By Time

Good Afternoon, I currently have a client who is experiencing some issues with his signatures in Outlook. As part of his business he has a disclaimer attached to the bottom of his signature to ...
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1 answer
440 views

Can't sign with DSA

A DSA key is created with: openssl genpkey -genparam -algorithm DSA -out dsaparams.pem -pkeyopt dsa_paramgen_bits:1024 openssl genpkey -paramfile dsaparams.pem -out dsakey.pem When I try to sign, ...
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Why (and how) to verify the signature of a download? [duplicate]

I have downloaded rsync from the official page. Each rsync download is associated with a signature. First, why should I check the signature? What am I risking if not doing that? I assume that if ...
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Outlook signatures location suddenly changed [duplicate]

I have an installation of Outlook 2010 that used to look for signature files in %appdata%\Microsoft\Signatures. However, recently it created a folder in Application Data\Microsoft\Signatures in the ...
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2 answers
2k views

Add author at SFX archive with WinRAR

For example: In "Autore" i want insert an author.
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1 answer
3k views

TAP 9.21.2 Driver - An error occurred installing the tap device

I have Windows 8.1 64-bit and I tried to install Betternet, but it gave me an error when trying to install the TAP driver, so I tried to install the TAP driver by itself and it gave me the same error. ...
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2 answers
349 views

Outlook 2013 - set different signatures for different domain mailboxes

I have a domain exchange account on Outlook, and my exchange account includes several mailboxes. If I go to the Account settings, only the primary email account shows, and it doesn't display the ...
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-1 votes
2 answers
2k views

When trying to create an MSI getting error has no digital signature, or has a digital signature that is not verified

When we are trying to generate an MSI using a tool supplied by HP ALM, we get the following error This is happening only on one machine but works fine on other machine so we think something is wrong ...
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1 vote
1 answer
3k views

About the security of adding a signature to a PDF file

We can add a "bitmap" or image signature to a PDF file, either by using Adobe Acrobat or by Mac's Preview app, but I wonder, besides always encrypting it with a password before sending it by email to ...
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  • 9,278
35 votes
11 answers
74k views

How can I sign a PDF document quickly and cheaply?

I need to sign a PDF document. However, Adobe Reader does not let me sign documents. I just need to sign the document, not edit it. Do I need to buy the full Acrobat software? Or is there a better, ...
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