Tagged Questions

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

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-2
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0answers
34 views

What happens behind the screens during an HTTPS connection? [duplicate]

How HTTPS(SSL communication) actually works? I have been reading many questions and answers on this topic but some basic question come up to my mind. 1) When I https to any site say ...
8
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4answers
805 views

How bad it is to install another company's root certificate to your server?

Our company uses a web server with a couple of web sites on it (private and public, over HTTP and HTTPS, some low risk and some high risk including online payments or other sensitive data for ...
0
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0answers
22 views

Client side ssl auth by signing with server key [duplicate]

So I followed this for setting up client ssl certs using openssl: http://drumcoder.co.uk/blog/2011/oct/19/client-side-certificates-web-apps/ It basically walks through creating a new CA key, and then ...
0
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1answer
20 views

Windows Firewall Connection Security with Certificate

I've been fiddling with the Windows firewall configuration of some computers within a VMWare based LAN (no domain). To aid in my testing and debugging, I created a small, self-hosted console ...
1
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3answers
63 views

Can any website secured using TLS can be impersonated using a rogue certificate issued by a rogue CA?

Any website secured using TLS can be impersonated using a rogue certificate issued by a rogue CA. This is irrespective of which CA issued the website’s true certificate and of any property of that ...
122
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4answers
14k views

Is there anything preventing the NSA from becoming a root CA?

There are now tons of Certification Authorities (CAs) that are trusted by default in major OS's, many of which are unrecognizable without online lookup or reference. While there have been attempts ...
1
vote
2answers
76 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
50 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
72 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 ...
0
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2answers
67 views

is Digital Signature vulnerable on the Internet?

We all know about how Digital Signing works. I just have some questions about vulnerability risk. At first, As I know, the Signature and the Data are separated and we can split the document into two ...
5
votes
1answer
174 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
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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
101 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
81 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
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2answers
54 views

Can Subject Alternative Name(SAN) Certificate install on different Web Server or OS?

Let say: application.house.com apache tomcat : physical server email.house.com apache tomcat : virtual finance.house.com Oracle Wallet Manager : physical server ...
0
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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 ...
5
votes
1answer
283 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 ...
2
votes
1answer
42 views

Is distinguished subject name at normal SSL Certificate issuance must same as generated Certificate Signing Request (CSR)?

For example: from Issued SSL Certificate: CN = abc.com.my, OU = Room, O = House, c= MY from generated CSR: CN = abc.com.my, OU = Room , O = House, L = KL, ST = KL , C = MY Questions: 1. Is it ...
2
votes
1answer
56 views

OpenVPN: Storage location and creation of keys/certificates?

I am re-setting up some OpenVPN infrastructure to be more secure than the original and wanted some guidance. It's noted that the best security policy is to keep the Certificate Authority (CA) offline ...
7
votes
2answers
106 views

What happens when certificates further up the chain expires before mine? (Equifax/GeoTrust)

I just bought a certificate from RapidSSL. Looking up the chain, I found GeoTrust who is signed by Equifax. Then I realized that the ”Equifax Secure Certificate Authority” is due to expire on ...
0
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2answers
124 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 ...
1
vote
1answer
62 views

How to convert SSL Certificate for mobile app?

I am in the current process of renewing my SSL cert for my website. I also have a mobile app for my site. I want to use the same cert from my website in my mobile app. How can I do this? Thanks - I ...
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
407 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
51 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
71 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
46 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
261 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
579 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
4k 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
88 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 ...
-1
votes
2answers
96 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
145 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 ...
1
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0answers
50 views

Open ldap start tls succesful even after CA is removed

I have one question related to how openldap and openssl handles the CA and server certificates. I have openldap client using openssl. My intention is to establish a ldaps connection to the ldap ...
0
votes
1answer
86 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
179 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 ...
0
votes
1answer
76 views

Hacked Router Faking a Certificate Authority

Does a typical computer begin with any shared secret with a certificate authority when I buy it? If not, a compromised home router could fake everything and get my credit card info when I attempt to ...
0
votes
1answer
108 views

How do SSL/TLS certificates work?

I'm trying to understand how SSL/TLS certificates work, but I'm missing something. I have obtained my current understanding from this website: ...
7
votes
2answers
355 views

How can we revoke all ssl certificates issued for our domain?

After having the hostmaster@domain.com email compromised, we found that someone issued a Domain Validated SSL certificate for our domain. Now we want to have all such certificates revoked. Is there ...
1
vote
1answer
96 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
3answers
158 views

“Web of trust” for self-signed SSL certificates?

SSL certificates, generally speaking, use a "chain of trust" model - a trusted certificate authority (CA) gets proof that a company such as Amazon owns amazon.com and issues an SSL certificate. ...
2
votes
2answers
67 views

What's the mitigation strategy for when a CA's private key is stolen?

I'm new to SSL/TSL and was wondering if you could walk me through the following scenario. Scenario Let's say I am one of a thousand websites that has a certificate signed by some certificate ...
2
votes
1answer
68 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 ...
3
votes
1answer
58 views

What crypto prevents & detects “invisible” CAs? (e.g. in X509v4)

For this question, I'm calling an "invisible CA" one that Is signed by a root ca and exists as a 2nd or 3rd tier Is valid, not expired or revoked Has a different Public key than one that is ...
0
votes
2answers
55 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
74 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
95 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 ...
0
votes
2answers
56 views

Temporarily suspending a Certificate Authority's Certiticate

The PKI RFC talks about revoking or suspending certificates. It also talks about revoking CA certs. However, I could not find anything about whether a CA or a Sub CA's certificates can be revoked or ...
2
votes
1answer
102 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 ...