The Stack Overflow podcast is back! Listen to an interview with our new CEO.

Questions tagged [certificates]

A piece of data used in public key cryptography (specifically public key infrastructures) 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. For questions specifically about [x509], [certificate-authority], or [public-key-infrastructure], please use those tags.

Filter by
Sorted by
Tagged with
0
votes
2answers
203 views

Why do certificate authorities often require/use multiple intermediates?

I suppose this is related to What is an intermediate certificate authority? but I think my question is a bit different so I'll ask it anyway. Why do most modern certificate authorities (e.g. ...
0
votes
1answer
427 views

VPN security/compromise

I want to get a VPN with one of the known providers. I don't know much about VPNs but I know they issue certificates which you download and it authenticates the connection and basically gives access. ...
0
votes
1answer
48 views

Choosing right way to secure access to server access via socket

I have an application running on a server, that has an exposed socket to the Internet to communicate with client that is/are application(s) on a phone. How would one go about properly securing the ...
0
votes
2answers
366 views

Typical mistakes when implementing digital signatures?

I am looking for a list of typical mistakes someone can make when implementing digital signatures for a software. And of course why they are mistakes and how an attacker could take advantage of them. ...
0
votes
1answer
480 views

Is my understanding about how SSL works correct?

I've been reading about 2-way SSL or mutual auth recently, and here's what I've figured so far: Mutual auth is a way for the client to authenticate itself to the server, just like the server does to ...
0
votes
2answers
568 views

How does Matrix SSL perform certificate validation?

We use a custom app which uses Matrix SSL (client side) to perform certificate validation on MAC and Linux systems. My question is, does Matrix SSL keep a cert store cache of intermediate and trusted ...
0
votes
1answer
1k views

Are “Certificate Templates” used only as a “Template” or do they validate a certificate request?

I'm trying to learn how Microsoft Certificate Templates interact with a certificate request, and can only guess that they take on one of the two/three forms: They simply help the client create a ...
0
votes
1answer
294 views

Is it possible to create a SMIME only PKI that *can't* be used for SSL?

Assume I have a Root CA that I want to share with hostile untrusted 3rd parties. Then constrain this root using specific EKUs at the root. OID=1.3.6.1.5.5.7.3.4 ; Secure Email Next, ...
0
votes
1answer
1k views

SSL decryption without installing a certificate on each client

Given a proxy performing MITM SSL decryption and inspection, is it possible to install a wildcard certificate (*.domain.com) on the proxy signed by a root CA (such as VeriSign or GoDaddy) such that ...
0
votes
1answer
2k views

Trusted Certificate Authorities - how do they work?

microsoft.com for example can use a Verisign Certificate for their domain. What are the chances that an attacker could ask verisign for a m1crosoft.com domain and get approved? It is very simillar, ...
0
votes
1answer
54 views

Certificate extensions - specific constraints

I have question about extensions of certificate and what specific extension should I use in my situation. The problem is following: I have a CA and I want that CA will issue certificate only for ...
0
votes
1answer
138 views

Good reason to continue using fraudulent certificate?

A relative of mine used a favorites link to login to yahoo. The favorite link is https://de.mg40.mail.yahoo.com/neo/launch? However, this link uses a fraudulent certificate. Visiting the Yahoo ...
0
votes
1answer
87 views

In a 3 tier (or more) PKI, is it permissible that a Name Constraint only be defined on the middle tier?

I'm working with an Issuing CA that doesn't support name constraints that are defined at a higher level. Assuming that it issues certificates that are compliant with the Name Constraints that are ...
0
votes
1answer
302 views

Why not use client certificates for premaster key generation

The question is about a very specific SSL handshake scenario. I understand that some servers may request client certificates in order to authenticate connecting clients. However, as far as I can know, ...
0
votes
1answer
705 views

Invalid Certificate when adding Gmail account to Apple Mail

Trouble seemed to start after upgrading to OS X 10.9. I stopped receiving email in an account I'd set up over a year ago. I removed the account and when I attempted to add it again, I was served a ...
0
votes
1answer
1k views

Wireshark Decode HTTPS Root Certificate

I'm currently dealing with a "Sniffy" java application. Well I can see it connecting to some kind of server using HTTPS. I would like to see what its sending or getting over HTTPS. i have read some ...
0
votes
1answer
2k views

X.509 certificate attack (small sha1 private key)

I've got a X.509 certificate, created by an unknown CA. The only thing I know is that the private key is very short, so I can retrive the private key. Is there any program I can use? The used ...
0
votes
1answer
280 views

Authentication methods without trusting 3rd parties unless explicitly indicated

The plan is to have a situation in which no third parties have to be trusted unless you explicitly indicate so. For example CA's are only used when the contact explicitly added the CA as a trusted ...
0
votes
2answers
2k views

Issuing browser certificates to Chrome and Firefox with Microsoft CA

Most companies use IE with an ActiveX control to create a CSR and submit it to the CA for approval. Since many browsers either block or don't support ActiveX controls, how can I enroll them using a ...
0
votes
0answers
33 views

Which certificate is recommended for releasing software in Healthcare domain?

Is there any third party company who assess software and provide a certificate saying the product is secured? I was reading about HITRUST alliance. I also read bit on EU cybersecurity certification ...
0
votes
1answer
105 views

Can I have a TLS signed certificate without a CA

And how can I do that if the answer is Yes?
0
votes
0answers
54 views

How to solve: Problem with converting pkcs12 file into a pem

I am trying to convert a client certificate from a pkcs12 type to a pem file using openssl, but this error is showed on my terminal. Does anyone have any idea why this is happening? I haven't edited ...
0
votes
1answer
35 views

Openssl not showing complete certificate chain

Tried following openssl command to show the certificate chain,but the ROOT certificate 'depth=2 OU = GlobalSign Root CA - R2, O = GlobalSign, CN = GlobalSign' is not shown in the output...Why? ...
0
votes
0answers
24 views

Seeking a reliable way of creating trusted certificate files for OCSP

In my deployments I use OCSP must-staple flags on certificates, and ensure that my server is set to do verification and OCSP stapling. That's all good, but I'm forever having problems creating the ...
0
votes
0answers
20 views

Can someone explain the significance of Certificate Signature algorithm in the selection of Cipher suite in a TLS communication? [duplicate]

Can someone explain the significance of Certificate Signature algorithm in the selection of Cipher suite in a TLS communication?
0
votes
0answers
25 views

Verifying Public Key Using The Digital Signature on Mac

I have just started with encryption and stuff, so please bear with me. Just playing around. I have an upstream service that has sent us a self-signed cert. Now from what I understand, we can verify ...
0
votes
1answer
80 views

Send a CA certificate via email without a digital signature?

If a friend wants to send me his S/MIME CA certificate containing his public key, why does he need to add a digital signature? A digital signature verifies that the content was sent by him and not a ...
0
votes
1answer
53 views

SSL certificate distribution of API

We have an API which has SSL certificate signed from authorized CA. The access to the API is limited. API is accessed from webapp and only from those client who have valid public key for SSL. Now, how ...
0
votes
0answers
26 views

How can TLS/HTTPS remain secure if the entire transmission is monitored? [duplicate]

Okay, so I'm pretty sure this question comes from a fundamental misunderstanding of how HTTPS works, but here goes: Say that someone has hooked into the "internet line" coming from your home so that ...
0
votes
0answers
33 views

Automating certificate management across a large number of printers?

Is there a way to manage certificates on a large group of printers that will install and renew them? It doesn't look like any of the fleet management programs will do this. How are these managed in an ...
0
votes
1answer
94 views

Importing an expired certificate into my jks

I'm pretty new to the certificate renewal process, so bear with me if this is a stupid/easy question I'm asking. I have a jks store that had a certificate expire under the alias aliasA. Another ...
0
votes
0answers
21 views

Certificate Pinning with SockJS

What is the SockJS way of pinning SSL Certificates in the client side when contacting wss:// to avoid CA trust? FYI, when using modules like HTTPS or WS, we can listen to the socket event and then on ...
0
votes
0answers
79 views

Why is my gf seeing a localhost self signed certificate when going to netflix?

Recently my gf told me she was receiving errors when trying to go to netflix. I took a look and the certificate is super wierd saying it is self signed. Why could this be happening? She only uses the ...
0
votes
0answers
41 views

CSP/KSP module for MacOS

My company developed a custom Key Storage Provider for Microsoft CAPI so that CNG-using Windows apps can perform signatures using a remote signature service. I would like to know if there is support ...
0
votes
0answers
46 views

Unable to get information from a PKCS certificate

I sniffed the communication between the client and the server using Wireshark, and I found out that during the handshake session, the client sends its certificate to the server. I've managed to get ...
0
votes
0answers
46 views

What are the security protections in using a TPM generated VSC to create a CSR

I am extremely new to the field of information security but was given a project to create a secure TLS certificate signed by our CA for a new security process. I found this thread (How to generate a ...
0
votes
0answers
220 views

SSL handshake: Client Hello and Server Hello

I am trying to understand how a client communicates with a server when using a proxy. The client is an Android device, whom the traffic is proxied to the server through mitmproxy. This is my topology:...
0
votes
0answers
35 views

Software build processes - Dependencies without admin privileges

we have the following problem and I would like to hear your opinions for this case: Currently several users are working with domain accounts which are in the local admin group (Yes, shame...) You ...
0
votes
0answers
48 views

Certificate Validation with SDS enabled on Ingress Gateway and mode set to MUTUAL

I have been having some difficulty understanding the mechanism by which certificates are validated by either party in a mutual TLS handshake. I have SDS enabled on my ingress gateway(s) and the ...
0
votes
0answers
36 views

Addons still work with Firefox on one account

I'm using Firefox 66.0.3 on Ubuntu, and like everyone else I'm experiencing the certificate bug which causes addons to be disabled. However, in one of my user accounts, the addons still work like a ...
0
votes
0answers
71 views

Usage of a self-signed certificate between Akamai and Azure

First of all, some background of what is proposed: The client's browser initialises request The request is resolved by public DNS (CNAME) to Akamai Edge The request is processed by Akamai accordingly ...
0
votes
0answers
32 views

SQRC use to verify e-delivered certificate

I have a need to provide a means of validating a certificate that is e-delivered. My thought is to use an SQRC to enable that verification by linking to a secure site that contains the original ...
0
votes
1answer
64 views

ADCS two tier PKI

Planning a two tier ADCS PKI infrastructure as follows: ORCA ____________|____________ | | | SCA1 SCA2 SCA3 one.int two.int three.int ...
0
votes
0answers
23 views

Securing a large application with multiple services and endpoints

Without getting too deep into the architecture, I would like to get suggestions / good reads on applying encryption to a large scale application with multiple endpoints. There are internal and ...
0
votes
0answers
35 views

authenticating SSL client certificates on server

current setup: i have a pki setup which issues client certificates to the users (so that only clients with the certificate can access the web application). was looking for ways to implement this and i ...
0
votes
1answer
470 views

How to make sure certifi python package is up to date

In python's requests module documentation, I find this important recommendation: For the sake of security we recommend upgrading certifi frequently! Q: How can I make sure that my system's certifi ...
0
votes
0answers
41 views

Is Azure Key Vault more secure than the machine certificate store?

I'm trying to secure the communication between two on-premise legacy applications (one .NET and one Java) using client certificates. One application is exposed externally so I don't want to rely on ...
0
votes
0answers
52 views

See data sent by application over https

Let's say I have an application (A) installed on my PC that communicates with some server over https. What would another application (B) on my machine need to do to be able to read the unencrypted ...
0
votes
1answer
118 views

Two message key agreement and mutual authentication protocol?

I am looking for, but not finding, a published protocol that does something similar to TLS 1.3 mutual authentication, but simplified by using assumptions to reduce the chattiness of TLS. If we assume ...
0
votes
0answers
36 views

Is there any Nmap command/script to identify certificate name mismatch and untrusted certificate?

I am using Nmap commands in my script for server validation. I know in Nmap there is the ssl-cert.nse script that retrieves details about the server certificate. I want one more step where I find ...