1
vote
2answers
56 views

SSL Certificate Trust Model

I have been looking at the SSL Certificate Trust Model, and there is something that does not make sense. If I am correct, the trust model makes it that if there is a chain of certificates with a ...
0
votes
1answer
45 views

How to get SSL certificate of a mail server?

I need to get SSL certificate of some mail servers. I know I need to do execute following steps. Do a DNS mx query on the domain name (dig google.com mx). Use the information to download SSL ...
1
vote
2answers
68 views

Why would Comodo SSL certs have two intermediate CAs (chain length 4)?

Comodo certs such as PositiveSSL have a chain length of 4, including two intermediate CA certs. What would be the benefit to them, or to me, of this length chain instead of a chain length of 3 with a ...
5
votes
1answer
165 views

Where are the anonymous/private domain validation SSL certs?

I have yet to find a CA that doesn't require personal information for DV certificates. Is this because all of the major browsers and operating systems have a policy to reject CAs that don't require ...
0
votes
2answers
38 views

How are “Certificate Signing” key usage certificates restricted to what domains they can sign?

Many big websites use their own intermediate signing certificates to generate SSL certificates for their domains. The intermediate certificates are issued by the usual root CAs but have a "Certificate ...
0
votes
1answer
96 views

Can anyone with access to root CA private key decrypt HTTPS traffic?

Can anyone with access to root CA private key decrypt HTTPS traffic of sites using certificate signed by that CA ? and if yes do he need to be man-in-the-middle or just monitoring traffic is ...
0
votes
1answer
70 views

Why are CA's now signing root certs with SHA2?

I see that CA's are now giving the option of having the root CA cert signed with SHA2. I have been told that the hashing function in a root has no security value, and is irrelevant as far as a ...
0
votes
0answers
29 views

What certificate attributes can I check to verify if an issuer is correct?

Apologies if this is a duplicate question. I thought I saw this discussed earlier but couldn't find the thread when searching. What attribute can I check to verify if I have the correct ...
0
votes
0answers
9 views

Is it possible to use certutil to export multiple certificates from a local client machine store, to a .p7b file? [migrated]

Is it possible to use certutil to export multiple certificates from a local client machine store, to a .p7b file? Scenario: We have a few legacy certificates based on some legacy templates (2012 R2). ...
5
votes
1answer
222 views

Are certificate authorities required to obey to the signature algorithm (hashing) specified in the CSR?

I was playing a little bit with signature algorithms, trying to determine which CAs among the ones I use are currently issuing SHA2 certificates. I generated a CSR specifying the SHA256 hash (either ...
0
votes
2answers
114 views

Problem with OpenSSL rejecting CA possibly due to 12 digit Serial No

I work as a tester at a VoIP software company. We've been running into a problem with using TLS to communicate with certain phones. The phones are from different manufacturers but both exhibit the ...
0
votes
1answer
58 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. ...
1
vote
3answers
289 views

How trustable is third party root certificates?

i recently tried to use fiddler2 from third party vendor telerik,while decrypting the https traffic of my network it asked me to install its own root certifcate in my windows operating system : have ...
0
votes
0answers
47 views

Problems implementing Authority Information Access in a certificate

I am implementing SSL certificates for internal use in an application. Due to the nature of this app, I'm basically implementing my own CA. I have created a self-signed cert for the CA to issue ...
2
votes
2answers
70 views

Should expired compromised certificates be taken care of if the time is always correct?

I am trying to set up a CA for my company, and issuing every employee a digital certificate and a private key. I am worrying about revocation and expiration. In my case, the root certificate of CA is ...
2
votes
1answer
44 views

Possibility of using CA as an attack point by governmental organizations under their pressure

I was always concerned about the model of trust behind CA stuff we use . Well, for most of us, it is OK to trust them, since they are reliable organizations with a bunch of solid experience. ...
0
votes
1answer
210 views

What is the deal with Valicert SSL root certificates?

Does anyone know what the status of the "Valicert Class 2 Validation Authority" root certificate is or what's going on with Valicert in general? I've heard that that cert has been deprecated, no ...
2
votes
4answers
483 views

SSL root certificate optional?

I may have been under the wrong impression on how servers should be setup and what certificates actually get sent over during the server hello certificate message. I came across this today from ...
1
vote
1answer
3k views

Can a CSR be created in OpenSSL with SHA2?

Can a CSR be created in OpenSSL with SHA2? If so, what would the command be and what does this tell the CA, if anything? If you could create a CSR using SHA2 would it "tell" the signing CA to use it ...
1
vote
1answer
83 views

Self-signing client certificates and distributing them, is the following a sound procedure?

I have a case at hand as follows: There is a number of clients in Internet (i.e. untrusted channel), initially in hundreds but growing in numbers. There is a server doing processing related to these ...
0
votes
2answers
90 views

Installing self-made cert as trusted CA on windows?

I'm looking into using mitm-proxy, but part of the process of filtering/snooping SSL is that you must generate and install a root cert as a trusted CA, so that mitm-proxy can generate and throw out ...
1
vote
0answers
137 views

If even Apple cannot properly install certificate [closed]

I've just installed a new copy of Mozilla Firefox/29.0 SeaMonkey/2.26.1 on a new Mac with OS X 10.9.4, and I'm getting an error message in place of a webpage when trying to access ...
0
votes
1answer
83 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
1answer
34 views

Does openssl store the certificate of the server after verification is done?

As per my understanding , openssl will verify the certificate of the server during ssl handshake , using the trusted CAs present in the CA certificate dir in the context. After the server certificate ...
1
vote
1answer
173 views

CSR from IIS 8 and Keeping my Private Key a Secret

I've been trying to understand something. When you generate a CSR from IIS, how is the private key kept as a secret, or is it? Do CA's email you a certificate that includes your private key? Because ...
1
vote
1answer
89 views

How to safely renew user and CA certificates in a PKI

I am currently developing my own PKI where x.509-client-certificates are issued by a public server. At the moment, the CA-public key is distributed with the binary and there are no routines for ...
2
votes
1answer
66 views

Is there any mechanism to audit which signed certificates are unrevoked?

We are currently using EasyRSA and OpenSSL to manage our user VPN certificates for OpenVPN. The process we have in place currently is: User generates a CSR on their laptop and sends it to us to sign ...
0
votes
2answers
52 views

determine X.509 certificate class

I am very familiar with OpenPGP but don't even use X.509 / S/MIME. I know that there are several classes for certificates (from email check to personal ID check). I would like to know how you ...
1
vote
1answer
69 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 ...
3
votes
2answers
94 views

Isn't this the same as using a certification authority?

Taken from Wikipedia, here is the pretext to my question: A certificate authority (CA) is an organization that stores public keys and their owners and every party in a communication trusts this ...
2
votes
1answer
101 views

How do I get a third-party-signed ssl client certificate?

I've been given a requirement of providing a client certificate to authenticate between two application's web services. The other application (that I don't host) is requiring an SSL client certificate ...
4
votes
3answers
267 views

From a trust perspective, is renewing a CA certificate the same as trusting a sub-CA?

I'm trying to understand the validation logic that would occur in the following hypothetical scenario An unpatched XP user who trusts a list of root CAs. Those CAs in particular have been renewed ...
2
votes
4answers
295 views

Why self-signed https is less trustworthy than unencrypted http?

It wouldn't be far-fetched to guesstimate that at least 50% of the web traffic can be intercepted in 2014. However, a guesstimate of active interception attacks is likely an order of magnitude ...
1
vote
1answer
62 views

How to Delete duplicates in CA Bundle Certificate File

I do have a big CA bundle certificate file and each time if i get request to add new certificate to the existing bundle i need to make sure it is not present already. How i can validate the ...
0
votes
1answer
47 views

Can two parties sign each other's certificate and exchange without CA?

Is possible (and practical) for two users to create their own self-signed SSL certificates, exchange these certificates (perhaps in a face-to-face meeting), and then communicate with each other ...
4
votes
1answer
3k views

Android Kitkat reports: “Network May Be Monitored by an Unknown Third Party” when using non-default root CA

My company uses a private PKI to handle such scenarios such as Mutual auth (TLS) to a website using client certificates SSL web server certificates on an Intranet (once a VPN session is ...
1
vote
2answers
71 views

Public e-mail Encryption Certificate

I'm quite new to this, so don't be too hard on me. I'm currently using the CipherMail MTA to generate e-mail encryption certificates. I created an own CA and public and private keys for our contact ...
0
votes
0answers
17 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 ...
2
votes
3answers
69 views

Are Extended Validation certificates any more secure than regular ones?

Or are they just an attempt to get you to pay more money to a CA because it tells your browser to show the address bar in green with your organization's name? Also, what are the technical details ...
0
votes
1answer
44 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, ...
1
vote
2answers
85 views

Authentication through digital certificates plus signature

While studying X.509 certificates, I've found that authentication is safer if I associate/combine one or more certificates with each signed message (certificate + signed message). The receiver of ...
2
votes
3answers
91 views

How are public key certificates updated securely?

Let's say I get a new computer that's never been connected to the internet before. The first time I connect it to the internet, is it susceptible to a mitm attack while downloading its public key ...
2
votes
1answer
1k views

SSL certificate chain verification

After reading many articles and watching many tutorials I decided to be specific because there are some things about SSL certificate chain verification and SSL cetificate verification in general that ...
2
votes
1answer
124 views

Why does facebook php sdk (and multiple others clients) include CA bundle with a lot of CAs?

This is what facebook ships with their API php client: https://github.com/facebook/facebook-php-sdk-v4/blob/master/src/Facebook/fb_ca_chain_bundle.crt It contains dozens (hundreds?) Root CAs. But ...
2
votes
2answers
176 views

Certificate authority structure - best practices

I'm working for a company that sells software products to customers some of which do not have the resources and/or know-how to build and maintain their own CA (used for the SSL communication of our ...
0
votes
0answers
36 views

How to gather/verify certificate data with limited information (Issuer, Serial, CN)

I asked this question in the "programming" section, Here. However it may be a simple answer for someone familiar with the security of certificates. The basic premise is I have a large table with ...
0
votes
0answers
38 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 ...
3
votes
1answer
71 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 ...
2
votes
2answers
186 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 ...
3
votes
2answers
125 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 ...