A piece of data used in public key cryptography that contains identifying information (i.e. email address or web address), a hash of a public key, and a digital signature that authenticates the data in the certificate.

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Modify Certificate Subject using OpenSSL x509 Command

I'm building a CA based on the OpenSSL command line tools. I don't want to use the openssl ca tool and its file based database though, instead I create certificates using the openssl x509 tool ...
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267 views

Untrusted connection when logging to stack exchange sites

I was able to log into various stack exchange sites with no problem, but as of today 1/5/2016 I'm getting the following error message with firefox 43.0.2: You have asked Firefox to connect ...
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52 views

Certificate and Path validation for S/MIME

I am working on a S/MIME client development and was wondering if there is a list of certificate and path validation checks that a client needs to perform while validating an email signature. My ...
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73 views

If I install a certificate for the purposes of logging into a Wifi connection, is it still safe?

There are some wifi networks (large universities for example) which use HTTPS to get to a login page, and in order to verify that they have not been spoofed, provide the certificate ahead of time (i.e....
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19 views

Mixing Off-The-Record and classic SSL

I am developing some pubsub system on top of Node.js and Socket.io. I decided to implement Off-The-Record (OTR) encryption by default for all of data transfers between clients and server(s). Question ...
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15 views

Signtool validation fails when signing and validating are done in different machines

I am signing an exe from a machine using a cer file. Then when I validate the EXE using the signtool.exe from the same machine, it succeeds. But when I try to validate it using the same .cer installed ...
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73 views

How to enable self signed certificates in Windows 10?

I want to use a Yubikey 4 with Windows 10 Pro for Bitlocker and login with my TPM. Unfortunately, I found out I need to enable self signed certificates and all the guides on the Internet I found were ...
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29 views

Finding the EMSA-PKCS1-v1_5 DigestAlgorithm field in the x509 certificate

From the RFC - https://www.ietf.org/rfc/rfc3447.txt A.2.4 RSASSA-PKCS1-v1_5 For each OID, the parameters field associated with this OID in a value of type AlgorithmIdentifier shall have a value ...
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89 views

Windows certificate verification with timestamping

I have been trying to replicate the behaviour of the Digital Signatures tab on windows file properties. I'm using WinVerifyTrust api and X509Certificates namespace to achieve my goal. I've managed to ...
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54 views

Windows IIS Event/Security Log ID of Private Key deletion of corresponding TLS certificate?

I'm in the middle of writing an MS Active Directory Certificate Services Key Management Lifecycle document for my organization. The primary purpose certificates will serve for this organization is to ...
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73 views

What are the formal methods to analyze Authentication Protocol

I designed an authentication protocol for consumer-producer applications, which barrows features from Kerberos and Tesla. To check the strength of protocol I considered different well known attacks ...
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79 views

Security implications of CA signed SSL cert for local development

Curious to know the security implications and potential risks involved with getting a CA signed cert for localdev.mydomain.com, and issuing it to all the developers who might need to spin up a local ...
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117 views

OAuth2 Authorization and Resource server certificates

I'm implementing a custom IAuthorizationServerHost using DotNetOpenAuth library. Example implementation uses two certificates for CreateAccessToken (see Listing 6): public AccessTokenResult ...
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941 views

Safe communication via rest api between two known servers

I'm using Kinvey as backend but because it doesn't provide the ability to run custom code I have set up another server. So basically when x happens on Kinvey server, I send a call to my rest api on ...
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16 views

Are GeoTrust SHA-256 intermediate chain and cross-root legacy support, mutually exclusive?

I have purchased a GeoTrust TrueBusiness ID SHA-256 with EV SSL Certificate. According to GeoTrust website, I must also install the corresponding intermediate certificate, which is "GeoTrust EV SSL ...
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60 views

Do search engines verify HTTPS certificates, and if so, against which CAs?

Just out of curiosity, I'm wondering whether search engines attempt to validate certificates and what is their trust store. Do they accept everything regardless of certificate's trust/validity or do ...
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52 views

SSL self signed certificate CER exception added to Keychain but fails in Chrome

Operating System: Mac OSX El Capitan 10.11.5 When browsing to the page I have a Privacy error, although an exception was added. I have the correct CER file so I added it to my Keychain TRUST THE ...
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33 views

JWT vs. Client Certificates

We have a transaction server that is connected to by different client applications. The requirement is to have a secure means of authentication for client applications to communicate with the ...
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46 views

OCSP recording with JMeter

How can I record an application which is using OCSP security with the help of JMeter? I am not able to record the application i.e. a native app with the help of JMeter as it is using OCSP protocol ...
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35 views

How to provide our customers ability to self service client certificate creation?

We have an API for B2B customers to access our platform. We require each B2B customer to have a client certificate. This is not the URL SSL certificate (https). The CN of each customer's client ...
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41 views

What comes into calculation of certificate signature?

I have written my own code with openssl in order to create certificates. In order to verify this code, I tried to reconstruct an openssl commandline generated self-signed certificate ... openssl req -...
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105 views

What Key Usage values are required to support Code Signing?

I have a .pfx that I want to use to sign a Clickonce app. However, on trying to do so, Visual Studio gives me "The selected certificate is not valid for code signing." When I go to certmgr.msc and ...
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61 views

How Do I Create a Production Client Authentication Certificate for Azure Key Vault?

I am learning about Azure Key Vault, and one of the scenarios it supports is certificate authentication, which you can read about here. The samples do a great job of explaining how to make a self-...
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54 views

Why does SubjectAltName not turn up in my CSR?

Does the CSR generated contains the SubjectAltName I have configured the openssl.cnf file to support extensions and when i dump the CSR i can see subject is available not the SubjectAltName This is ...
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36 views

Problem using custom CryptoNG KSP on IE 11

We are currently developing a custom KSP (Key Storage Provider) for a Key Storage System. We successfully developed a CSP (CryptoAPI) and a KSP (CryptoNG) provider, and both work really fine for ...
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54 views

Theory behind certificate for job account

I made it work a job account protected by a certificate in a java spring application but is not that clear to me the minimal steps.(Could you believe that :) I need some theory. Here my steps: ...
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295 views

Certificate Transparency, TLS Extension method of serving SCT's

I was curious about how to supply certificate transparency from my web server. There are 3 ways certificate transparency information can be delivered to the client's browser (Source: http://www....
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1k views

Does Microsoft Edge (Spartan) share Cookies, Cache, Passwords, or TLS Certificates with Internet Explorer?

Windows 10 was released with a new browser called Microsoft Edge. Interestingly, Internet Explorer is also installed on the same default install. Given that Chrome and Firefox tend to separate their ...
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158 views

How to generate “CRL numbers” for X.509 CRL

(Context: I'm working a process to publish a CRL periodically -- eg once every day.) With standard X.509 certificates, "serial numbers" are required to be positive integers, but they do not need to ...
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174 views

Making the Firefox key and CSR creation process transparent

Background I was a bit surprised that several CAs do not allow anymore to send a plain old CSR in text form to them which was created in the classic fashion with OpenSSL or similar. But this would ...
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97 views

Does Activesync certificate authentication replace a password, or act as 2 factor?

I am looking at Activesync authentication and want to know if Certificate Authentication ignores a client username and password or Certificate Authentication requires a username and password ...
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38 views

What are some scenarios I would use MSFT Certificate Enrollment Web Services?

The Certificate Enrollment Policy Web Service and the Certificate Enrollment Web Service are made for non domain connected machines to retrieve certificates of various kinds. When setting this up, I ...
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70 views

Certificate advice for deploying code-signed software as a 3rd party vendor

I am in the process of developing an application for an organization, and am looking for a sanity check on my strategy, especially given the the nature of the SuperFish nonsense that was exposed. The ...
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250 views

Distribute S/MIME public keys and CA cert for email security

I have my own CA. I want to distribute S/MIME certificates for 10 different users. I saw S/MIME keyservers from http://wiki.cacert.org/KeyServers, but I don't want to use public servers. What is the ...
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98 views

Can't get my SSL CA to work with Apache

So I have an SSL enabled website running on Apache2. https://eamorr.com (I get a warning in my browser, as expected) I have a config file for this website at: /etc/apache2/sites-available/eamorr....
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72 views

Setup local Certificate Authority & integrate with SCEP

I want setup local Certificate Authority and issue X.509 certificates under my CA. In order to achieve this I am exploring following options such as: OpenSSL/OpenCA BouncyCastle Cryptographic APIs ...
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299 views

Connecting to postgres with SSL

I need help understanding some basics about the postgres database server and SSL. I am developing a Windows desktop application that will connect to a postgres database, in single user mode, with both ...
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165 views

Is a android app signing certificate unique?

The Certificates that are used to sign Android applications are generated by the user and not checked or signed by any authority. They are RSA or DSA Certificates and as i read on crypt.stackexchange....
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227 views

1.3.6.1.5.5.7.1.12 Logotype extension - how can it be generated from openssl command line

If you look at this subCA Certificate from Verisign http://www.tbs-certificats.com/FAQ/en/495.html?p=en/495.html It has the following field 1.3.6.1.5.5.7.1.12: 0_.].[0Y0W0U..image/gif0!0.0...+......
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45 views

Is SCEP safe if I use a different long and complex password per enrollment, and validate it against expected parameters?

I'm considering using SCEP to enroll iPads and other devices in my network. The iOS configuration profile allows me to configure a different password for each device. Is it valid, and safe for me to ...
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264 views

Does Mac OS X 10.8+ support self-signed Package Installer

I'm not sure whether self-signed Package Installer are supported by Mac OS X 10.8+ Using informations in How to create an Apple Installer Package Signing Certificate I could create a Package ...
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40 views

Question about the Perspectives add-on, is this dangerous?

When I visited Google and Facebook, and then clicked on the Perspectives add-on button to check the certificate information, I saw this:     What does this mean? Shouldn't it have ...
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177 views

Deploying software that requires X.509 certificates

I have a self-hosted WCF application, with a server application running on the server (obviously) and a client application that will be installed on the users PC. Up until this point I have been ...
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56 views

Does Active Directory Certificate Services support Card Verifiable Certificates?

Does Active Directory Certificate Services support accepting requests for, and generation of, Card Verifiable Certificates (TR-03110)? If so, in which version of Windows Server was the functionality ...
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262 views

“Keyset does not exist” when using SignData function with RSA

"Keyset does not exist". I know that there are tons of question about this error, but mine is totally different. I'm not gona use the key from windows certificate store, but load the public key & ...
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130 views

What are some good design practices for cross-platform certificate storage?

Question from the Bouncy Castle development list: At present we use the Windows certificate store as: var store = new X509Store(StoreName.My, StoreLocation.LocalMachine); store.Open(OpenFlags....
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20 views

Some Windows servers do not seem to have RSA certificates. What is wrong?

Some Windows Server 2012 machines have certificates. Some do not. I am running this command: Get-ChildItem -Path Cert:\CurrenterUser\My | Where-Object { $_.PrivateKey -is [System.Security....
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10 views

Security Concerns of importing SharePoint Root Authority to Trusted Root Certification Authorities store

We are experiencing slowness because of SharePoint's STS certificate CRL checking. This is a known issue and there is a Microsoft Workaround for it: https://support.microsoft.com/en-us/kb/2625048 The ...
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0answers
19 views

Is comparing the thumbprint of a SSL certificate secure enough?

I was wondering if comparing the X509Certificate2.Thumbprint of two certificates count as a save way to identify if a certificate is correct or not. Of course this would only work for specific ...
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0answers
35 views

Problem with configuring PEAP to only accept users with client certificate. (freeradius)

I'm currently trying to configure PEAP. I had no problems configuring it without the use of client certificates. But I want to only accept people who have a valid cert. However, the clients can ...