Certificate authorities verify the owner information of certificates by signing them.

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MS Certificate Services, SCEP and Domain Credentials

I'm reading about Simple Certificate Enrollment Protocol (SCEP)2 vulnerabilities from CSS's The Use of the Simple Certificate Enrollment Protocol (SCEP) and Untrusted Devices. The paper discusses a ...
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32 views

Changing the string format of Burp generated certificates

The certificate verification in a piece of software I'm poking uses UTF-8 encoded strings to verify the certificate's host name. Certificates generated by Burp suite, however, use the custom type ...
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1answer
43 views

Windows - service account default certificate store

I am writing a web app that connects to external web services. The external web services serve an intermediate certificate signed by Thawte SGC CA - G2. When I setup IIS to run the web app using ...
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2answers
180 views

What happens if the CA has knowledge of private keys?

In a classic PKI scenario, the certificate authority receives signing requests generated by an end-user which owns the keychain, and thus has his private key secret. Consider a scenario in which the ...
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173 views

How to become an internationally recognized certificate authority (CA)?

What's the procedure a certificate authority (CA) must follow to get internationally recognized, like Verisign or GlobalSign?
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110 views

SSL Wildcard certificate to issue anther certificates

Let's say, that I buy an *.example.com SSL certificate. I want now to generate subcertificates and include the *.example.com certificate in a trust path: host1.example.com, with an alternate name ...
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Is the root CA certificate required in the .crt file? [duplicate]

I am setting up SSL on Nginx with a free StartSSL certificate. Based on the instructions given on this StartSSL page I created a unified certificate containing the CA's root certificate, Intermediate ...
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2k views

Unrecognized leaf certificate

Every 15 minutes or so I get this message in my system.log Apr 25 22:05:36 Ivans-MacBook-Pro.local apsd[194]: Unrecognized leaf certificate Apr 25 22:20:57 Ivans-MacBook-Pro.local apsd[194]: ...
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1answer
284 views

SSL Certificate framework 101: How does the browser actually verify the validity of a given server certificate? [duplicate]

Sorry I know this is a complete noob question and at the risk of posting a somewhat duplicate topic. I have a basic understanding of public/private key, hashing, digital signature... I have been ...
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3answers
150 views

Risk in buying SSL cert from non well-know party

Let say I knew a guy is selling SSL cert in a very cheap price, assume they will generate a real and valid cert for me, since I need to submit my CSR to them and they pass to th CA, are there any ...
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78 views

Will the recently found OpenSSL vulnerability Heartbleed affect my public site for which I obtained an SSL certificate from a CA? [duplicate]

I had generated the CSR with OpenSSL. Do I need to regenerate a new CSR with no vulnerability due to OpenSSL in order to obtain a new certificate from a CA?
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101 views

Is the Common Name mandatory for digital certificates?

I'm working on a project, where we use the Common Name as a certificate's basic identifier. However, importing certificates without the Common Name fails. What's the default way to use digital ...
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1answer
146 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, ...
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139 views

What is the point of certification authorities that are not trusted by browsers (=trusted by Root CAs)?

See here: https://www.cacert.org/index.php?id=1 Chrome, Firefox and Internet Explorer warn that it is not trusted, essentially making the entire thing useless. If I want some kind of ssl certificate, ...
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2answers
293 views

When you buy a certificate, does the certificate authority have (a copy of) the private key?

I always assumed that the process for getting a (trusted, not self-signed) certificate was more or less like this: You generate a public and private key pair From this key pair you generate a ...
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31 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 ...
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1answer
514 views

Active Directory - Certificate Based Authentication - Multiple certificates for user

First, I have very limited knowledge about AD. Problem: I authenticating users on AD using user certificates. I want to authenticate user on various devices (including mobile devices). Each will ...
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1answer
96 views

Finding the type of SSL certificate with cURL

This is a part of curl's verbose output when connecting to the HTTPS site of Google. * Server certificate: * subject: C=US; ST=California; L=Mountain View; O=Google Inc; CN=www.google.com * ...
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3answers
288 views

Does http support encryption without https (like STARTTLS)?

Does http support encryption without https, akin to STARTTLS in smtp? This may sound like a stupid question, but just think about it. Banks require strong encryption, and cannot do business without ...
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1answer
634 views

Certificate verified using two different paths

StartSSL has an intermediate certificate that they use to sign their EV certificates: sub.class4.server.ca.pem. This certificate's issuer is shown by openssl x509 to be /C=IL/O=StartCom ...
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44 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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3answers
289 views

SSL Certificate for an email server

I am completely new to SSL/TLS and would appreciate any help you guys could give me. To give you some background info, our company website is hosted externally by our ISP, however our email is ...
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2answers
149 views

Why do public key certificate “Trust anchor”? Does this introduce a single point of failure?

When you look at currently used concept of Root CA (primarily in SSL/TLS context), you can see a single-point-of-failure vulnerability, which means, if your private key is disclosed, you automatically ...
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124 views

SSL can stop MiTMs … but on the long run, can it really? [duplicate]

SSL uses CAs which sign certificates for the domains after they validate that the person requesting is truly the owner and by a public/private key pair a encrypted connection is achieved which cant be ...
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512 views

How can I prevent that my users get a certificate issued for my domain on my behalf?

I have a domain, where some other users have access to upload files, use email, use XMPP, etc. How can I prevent that these users go to a certificate authority and get a certificate for my domain? ...
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1answer
611 views

google certificates correct CA [closed]

I view certificates of https://www.google.com.ua/ So I thought, when requesting via cURL, if I point by CURLOPT_CAINFO to those certificates (GeoTrust Global CA and Google Internet Authority G2 in ...
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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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1k views

What Trusted Root Certification Authorities should I trust? [duplicate]

After two recent Slashdot articles (#1 #2) about questionable Root Certificates installed on machines, I decided to take a closer look at what I have installed on my machines. (I use current versions ...
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Certificate authorities: history and registration

CA's are a key part of the internet's infrastructure few people are aware of. SSL was mostly hacked together at Netscape in 1995. I'd like to understand more about the organizational structure of CA's ...
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1answer
40 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 ...
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52 views

Cetificate Pinning. How do we handle the situation where a website is visited for the first time?

What I essentially mean to ask is, how is the scenario where a user who visits a website for the first time (the certificate for the website is not pinned in the browser) handled ? Additionally how is ...
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1answer
263 views

Is it safe to accept the security certificate from AOL chat? [closed]

Is it safe to accept the security certificate from AOL chat? Did they recently change their certificates? These images are from Pidgin.
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3answers
180 views

Why does the RFC 5280 dictate the CAs not to issue certificates with negative serial numbers?

I have tried to issue a certificate beginning with 8 to F but I have found it is impossible, mostly due to the RFC: The serial number MUST be a positive integer assigned by the CA to each ...
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69 views

Root certifcate from an CA company which can be encrpyted by SoftHSM

Does anybody know a CA company which allows me to put the bought CA certficate inside SoftHSM (the same as an HSM but without any hardware, it is pure software)? Is it hard to work with the PKCS11 ...
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1answer
152 views

Internal code-signing certificate on Windows

I'm looking to improve defense-in-depth on a system, primarily by closing some holes in injected DLLs. Certain applications installed on the system cause helper DLLs (e.g. shell extensions, BHOs, ...
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1answer
147 views

automatic connection from LSASS to different IPs. Is this the usual behavior?

I'm using windows 7. firefox 22. connecting through a regular residential wifi router. In the last month I've noticed that when I connect to the internet and once in a while my firewall indicates me ...
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1answer
179 views

Where does a Hyper-V guest get its entropy when generating a certificate authority key pair?

According to findings by the EFF's SSL observatory, there are "tens of thousands of keys that offer effectively no security due to weak random number generation algorithm." My understanding of that ...
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281 views

Why are private certificates not trusted?

When we go to websites that have generated certificates themselves you see this red screen that says do not go there!: However when it is trusted by some companies it's all good. So I have a couple ...
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121 views

Is Certificate pinning different from CA pinning?

I am trying to understand if pinning a certificate essentially means pinning the CA or if they are different how so ?
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1answer
607 views

Root certificate key usage (non-self-signed end entity)

This discussion does not include self-signed end entity certificates for hosts like web servers and mail servers. OpenSSL's default configuration for a CA certificate has the following keyUsage: ...
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Is authorisation with token secure?

I have a general security question: Let's say there is a client-server application with authorisation by login and password using a secure connection between server and client (https). User can have ...
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117 views

List of certificate authorities in browsers and mobile platforms [duplicate]

Is there a list of certificate authorities installed in popular browsers and mobile platforms? I am considering a few alternatives for an SSL certificate, and I would like to make sure that the one ...
2
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1answer
235 views

How can a trusted intranet certificate be issued if they are being phased out?

I've just seen this article regarding the phasing out of intranet names on SSL certificates. However, CAs such as this one claim to still issue them and it will be "Trusted by all popular browsers" ...
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157 views

search CA for someone's public key

do CAs offer service wherein an application can request someone's public key? i am trying to do this but i am unsure if it is correct (suggestions of better ways to do it will be most appreciated): ...
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1answer
589 views

How to go about an ssl certificate renewal

I've got an ssl certificate from godaddy, and it's time to renew. I ended up with a single "keystore" file, which I give to my webserver (jetty). This is the process I went through to generate the ...
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1answer
409 views

Who is this strangely named Certificate Authority?

I'm researching certificate authorities, and I just have no idea what to think of the CA named x00Ax00-x00Tx00rx00ux00sx00tx00 x00Gx00ex00sx00.x00 x00fx00xFCx00rx00 ...
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2k views

How can you check the installed Certificate Authority in windows 7/8?

And know which are not default ones installed by Microsoft?
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1answer
103 views

What do people mean by “top-down manner” in X.509 certificates?

What do people mean by saying that X.509 certificates work in "top-down manner"? Do they say that because CAs can do cross certifications?
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Why isn't there a Global Root for SSL?

I was just wondering why there is a file on your computer implementing the trusted root CA's instead of something similar to DNS where there is a file on root servers that computers check against to ...
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Writing Security Functionality Requirements [closed]

Is there any Guideline Doc. or Tutorials for writing Security Functionality Requirement (Common Criteria)for a product?