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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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 ...
2
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1answer
24 views

Setting up a wildcard certificate, question about generating CSR?

I have registered a new domain for a project. The hosting is actually done by a vendor. I have set the nameservers according to the vendors specs. Now they are requiring the cert in PFX format. ...
36
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3answers
6k views

My friend revealed both private and public keys for his server. How serious is this?

A friend of mine managed to expose both id_rsa and id_rsa.pub file from his server via apache. I mentioned to him that this is serious security issue but he brushed this off like it was no big deal. ...
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2answers
47 views

Conflict between cipher-suite and certificate [duplicate]

When capturing my SSL session (using Chrome) I have noticed that the server chose TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 (0xc02b) as the cipher-suite and the certificate signedcertificate signature ...
2
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0answers
25 views

Creating SSL certificate signed by a self-signed CA certificate in Jetty [migrated]

I'm trying to configure a jetty-distribution-9.3.1.v20150714 backend running on Java 1.8.0_45-b14 with a certificate signed by a self-signed CA certificate, for SSL pinning. Following Apple's guide, ...
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9 views

How to verify Signature Value using cert file in C#? [migrated]

I am noob in security sorry for that. I have an xml file which include, <?xml version="1.0" encoding="UTF-8" standalone="no"?> <ID_VG_Response> <Result> ...
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1answer
62 views

Browsers root CA accepted, countries and checking fingerprints

This is a question derived from several others, and I can not comment on those, so it is not duplicated, please read: In some related questions some users comment that: "They wouldn't ...
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2answers
36 views

What exactly is IE / Chrome checking when I view the “certification path” tab on cert connection details?

When I bring up certificate details for a web page in IE or Chrome, I have the option to view the certificate hierarchy (under a tab called "Certification Path"). Here's an example for ...
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5answers
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What prevents a man in the middle from requesting a certificate for your server?

Let's say you have a server at shop.example.com and you are requesting a certificate from some trusted CA like Comodo (they say they'll issue it within few minutes online). First of all, how can ...
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1answer
31 views

Is there an official standard and/or name for PEM certificate bundles?

This is a question that's not really about security proper. It's about security/crypto nomenclature. It's been bugging me a bit, so here goes: I know two approaches for bundling related ...
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2answers
51 views

How to identify which root CA does the client certificate use?

How can we identify which root CA client used when there are multiple root CAs on the server? We can compare the public keys of the client certificate and the root certificate but if we have many ...
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2answers
68 views

Internet Explorer - Advanced Properties for Trusted Root Certificates

If you go to IE -> Internet Options -> Content -> Certificates -> Trusted Root Certification Authorities. Now Click on some CA certificates and click on Advanced You can add properties to the ...
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2answers
149 views

Should I update my SHA-1 certificates? If so, how?

Q: Should I update my SHA-1 certificates? If so, how? Recently I noticed the "https:" has a red strike-through and warning in Chrome, but only on certain websites. Apparently this has been ...
3
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1answer
74 views

How should certificates be shared between a proxy and a frontend?

At work, I've been asked to look into creating a reference topology for a WebSocket chat application, which includes a proxy between the web-facing frontend server and the backend. At the moment, I am ...
4
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1answer
203 views

Why does COMODO have 5 root certificates on a new Apple laptop?

Why does Apple include 5 COMODO root certs in OS X? There's "AddTrust {Class 1, External, Public, Qualified} CA Root" and also "COMODO Root Certificate". Why isn't one enough, if it's owned by a ...
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1answer
29 views

A collection of tests and demos for security headers and TLS configurations [closed]

There are (or have been) various websites designed to educate and provide examples on good / bad configurations of security headers and TLS configurations (e.g. https://badssl.com/) I want to build a ...
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2answers
66 views

Unable to “trust” self-signed certificate

I am currently running a setup that interfaces with many appliances running HTTP servers (running on Windows Embedded). The connections I use are HTTPS connections. My problem is, every time I open ...
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4answers
520 views

What Country, State and City should I choose when requesting an SSL certificate?

I am really confused about the country, state and city I should select when submitting an SSL certificate. Should I provide the location of my servers or my current home address?I can always reissue a ...
2
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0answers
25 views

Get RSA private key and certificate from GlobalSign certificate [migrated]

I can generate my own private key and certificate as follows: openssl genrsa -out privatekey.pem 2048 openssl req -new -x509 -key privatekey.pem -out g4certificate.pem -days 1095 Copy+pasting the ...
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1answer
58 views

“Manually” verify a certificate

I want to 'manually' verify a certificate and the first step in doing so, I accessed paypal.com and obtained the following RSA modulus and signature value. modulus = ...
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1answer
54 views

What are these two certificates I need to install - external CA root certificate

I have to install 2 certificates on a computer and I am a little puzzled by the certificates. The first certificate has these details: Issuer: CN = AddTrust External CA Root OU = AddTrust External ...
2
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0answers
25 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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2answers
42 views

Using Different Algorithms in Single PKI

Assume the following Public Key Infrastructure: |Root CA (RSA) |-Sub CA (RSA) |-Sub CA (ECC) Is there any rational that explains why this would not be an acceptable implementation? Is the ...
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2answers
124 views

What if the Local Windows Cert Store is Compromised?

The diagram below illustrates chaining digital certificates up to a publicly trusted Root Certificate: I have been researching how trusted root authorities (such as GlobalSign or Verisign) are used ...
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2answers
3k views

Is it safe to send SSL certificates via email?

I just ordered a cheap Comodo PositiveSSL Certificate via a UK reseller, and I was rather surprised to find that the following files were emailed to me automatically, in a zip file: Root CA ...
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2answers
68 views

OpenSSL x509: Is there an order in subjectName fields?

Is there an order to respect in subjectName field when creating a x509 certificate with OpenSSL command? In other words, what are all possibilities of displaying subjectName of x509 certificate in ...
6
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1answer
76 views

What real life scenarios require separate end user certificates for Signing and Identity?

Based on this question, I'm interested in any rational argument that would support the idea of maintaining separate signing and authentication certificates. Conventional logic & wisdom says there ...
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2answers
83 views

How do I prepare for Certificate Authority end of business?

We are deploying a security solution which uses certificates to validate documents. These certificates are issued by our government-authorized CA. What if in a distant future, the CA who provided us ...
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1answer
77 views

Should self signed wildcard certs be used?

I think this is more urban legend around where I work than anything. I do not see anything in RFC 2459 that specifically says whether or not they should be used or if there are any known problems with ...
2
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4answers
138 views

SSL encryption process and its security

I know the basics of SSL encryption and how certificates work, but there are some points that are not clear to me regarding the SSL security: If there is a intercepting proxy between the web server ...
4
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1answer
147 views

Can't get rid of “Your connection to website is encrypted with obsolete cryptography”

In my Nginx config I have: ssl_protocols TLSv1 TLSv1.1 TLSv1.2; ssl_ciphers ...
4
votes
4answers
475 views

Why are there very expensive and cheap SSL same type certificates? [duplicate]

I am about to launch an online shopping site (currently running http) and I was thinking heavily of moving to SSL which includes a green bar, because this is very important. However, when I first ...
5
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2answers
59 views

Understanding digitial certifications

q1) Does that mean that every time information is exchanged, both the original data + digital certification is sent? Meaning data + signature for each and every exchange. q2) Can any kind soul here ...
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3answers
275 views

How does a CA send a digital certificate?

I would like to know after approving the Certificate signing request, does the Certificate Authority send the Digital certificate to the applicant by converting the digital certificate to PEM format ...
7
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1answer
232 views

How does the OpenSSL Alternative chains certificate forgery (CVE-2015-1793) attack work?

The security advisory for the issue can be found here: https://www.openssl.org/news/secadv_20150709.txt OpenSSL Security Advisory [9 Jul 2015] Alternative chains certificate forgery ...
6
votes
2answers
77 views

Issuing certificates to two departments from same ROOT CA so one does not trust the other

Scenario: We have two departments within IT; Say Department-OLD and Department-NEW. A single internal PKI environment exists and a root CA (singular) is trusted by All endpoints. Problem: ...
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34 views

Implications of IP Address as Subject Alt Name in certificates

Are there specific known negative security implications of including the IP address of a server as a Subject Alternate Name in the server's certificate?
5
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1answer
242 views

Is my ISP trying to impersonate google?

Everything has been well for years and today I wake up with this: A warning on EM Client (also got the same on my iPhone) that the certificate for googleapis.com isn't valid. And the certificate ...
2
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1answer
48 views

Is it possible to use obtained wildcard certificate on more than one server?

We are using two Debian servers in our company (with apache 2 as httpd) and our services are split between those two of them. One server has the website, the other has some minor sites under ...
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0answers
19 views

What are null certificates in Gnome Seahorse? [migrated]

In the "Default Trust" tab in Seahorse there are several personal certificates named simply "(null)", which are issued by "No name". There's nothing on their property pages. What are these? Can they ...
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1answer
57 views

How to know if certificate is self-signed

How do I find out if a certificate is self-signed or authorized by CA? Somewhere I read that self-signed subject and issuer will be same, is it correct?
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2answers
80 views

Gmail X.509 certificate chain

I have asked about this on several forums but never got a straight answer. If the root certificate on a certificate chain has a different fingerprint to the root certificate available for download on ...
2
votes
1answer
76 views

Why am I getting the message that Security Stack Exchange is only partially encrypted? [closed]

I realize that this is an information website but it does concern me a bit that I'm getting the message that this website does not supply ownership information. Does this mean that my posts can be ...
2
votes
2answers
57 views

Multiple Versions of SSL Signing Certificate

I was checking out the SSL chain on onlineaccess.ncsecu.org because a network glitch made me paranoid. Both Firefox and IE on my computer have this chain: onlineaccess.ncsecu.org Serial number ...
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1answer
39 views

Certificate validation Local DNS hosts file

I've a question regarding a certificate validation error I'm getting. I'm performing an https request from one machine to another (windows machines). On the destination machine I've configured a ...
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0answers
28 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 ...
2
votes
3answers
92 views

In the context of SSL Labs where is the “trust store”?

When I'm testing a site with https://www.ssllabs.com/ssltest/ I'm getting this: Could you explain: Why are there two paths? Where do they come from, where are they configured? What is this "trust ...
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1answer
86 views

SSL and Fake Domain

I am reading information related to SSL handshake on the Internet. It seems like in the last step the domain name is compared to the domain in the certificate. How exactly is this protecting against ...
2
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1answer
53 views

EC private key, RSA certificate. Is this realisable?

I was wondering if is it possible to generate EC private key: openssl ecparam -name sect571r1 -out ecparam.pem openssl ecparam -in ecparam.pem -genkey -noout -out eckey.pem then generate ...
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1answer
64 views

Extract public information from p12 without having the password

I know this question was already asked here but unfortunately there are no satisfactory answers. Please correct me if I'm wrong, but if I have a p12 file the following two situations are possible: ...