I need to take a signed PDF document, compare with a reference document, and see if the only thing that changed was the addition of a new signature. I am trying to implement this with rust's lopdf ...

I want to 'manually' compare a digest/hash of a message with the decrypted signature value on this digest. For this, I want to decrypt the signature value (the signed digest) of the message with t...

I have a rather simple challenge, or so it appears at first. I have chosen the python to do this. I have multiple PDF files for which I have to detect the digital signature (if it is there or not a...

I am trying to create a signature as shown below, but I am getting this error: java.lang.NoSuchFieldError: xmss_SHA256ph I am using bcprov-jdk15on and bcpkix-jdk15on version 1.64 and Java 8. I h...

I just searched through the git-config(1), git-log(1) and git-show(1) man pages of git 2.6.2, but haven't found any hint that the --show-signature option (to e.g. git show or git log) can be config...

We are working on optimizing the digital signing process using the signtool.exe digest options. So far the workflow looks like this: Create the digest on the client: signtool.exe sign /f cert /fd...

I know, it looks strange, but I need to sign some data on client-side using javascript only, no ajax backdoor to server-side openssl available. Could someone suggest some client-side solution to si...

I am trying to get a better grapple on how public/private keys work. I understand that a sender may add a digital signature to a document using his/her private key to essentially obtain a hash of t...

Digital text with text and background imageI am trying to digitally sign pdf file using PDFBox in Java with visible text to appear on page similar to one that gets created when manually created in ...

I'm generating a PDF document with signature and I want it to be LTV enabled. For this, I sign the PDF when creating it and then I add the second version containing the DSS with the validation rela...

In go (golang) I need to sign a pdf document, but unlike other languages there are no libraries that make the job easier. I have found a couple of paid ones but they are not an option. To start, I ...

I was able to succesfully use the information on this page to digitally sign a file using an x509 certificate (.pfx file) using the following code: const Int32 CRYPTUI_WIZ_NO_UI = 1; const Int32 ...

If I have a self-signed certificate that is not in the machine's trusted root certificate store, how can I verify that a PE file is Authenticode-signed using that certificate without adding that ce...

I have a string and I need to generate a digital signature for it using my private key? How can I do it in Python?

What is the official source for apksigner as referenced e.g. in this answer? People are citing Android Studio, Android SDK Build Tools/Platform Tools/Command Line Tools etc. (as well as some shady ...

After reading this Stack Overflow question (and other pages, referenced below, in the comments) I came up with a PHP code that, given a digitally signed PDF file, informs who signed it: <?php fu...

I have app that needs to retrieve some data (signer name) from digital signature "attached" on PDF files. I have found only examples in Java and C# using the iText class AcroFields method GetSigna...

Is it possible to generate PDF file in PHP with digital signature? An open-source solution is preferred.

How do I structure a swift POST request to satisfy the Sign In With Apple token revocation requirements? I am not sure what form-data, client_id, client_secret, token, or token_type_hint are suppos...

After searching for a while on the internet which produced no success I will ask here. Some posts in the internet say that it's not possible to apply a digital signature to a VBA-Macro inside an Ex...

Is there practical difference between HS256 and HS512 encryption algorithms, or is the additional security from longer key redundant compared to already unbreakable key? Which one should I use to e...

I'm using the Spring Security SAML 2.0 sample webapp on Tomcat 7 and have modified it to try to get it to authenticate against a Ping Identity service. The webapp is talking to the service and it's...

Many customers of mine use a software for doing digital signatures. This software is called Dike and it is provided from the italian chamber of commerce and it interfaces to smart card hardware lik...

I'm trying to send HTTPS request from my Java EE program to the host that requires certificate authentication. I have a proper keystore file, truststore with imported CA, the listing of both shows ...

I want to encrypt a file with the private key using OpenSSL with the RSA algorithm: openssl rsautl -in txt.txt -out txt2.txt -inkey private.pem -encrypt Now if I do a decrypt operation: openssl rs...