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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1answer
130 views

XER encoded X.509 certs [closed]

Would anyone happen to have an example of an XER encoded X.509 certificate so I can play around with it? Thanks!
2
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3answers
1k views

Public key Infrastructure

Here the MD5 hash is being encrypted with the private key of the sender. But I read in a paper that private key is only used for signing and not encrypting. Is the image wrong or can private key ...
1
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1answer
486 views

are organizations that receive certificates considered “end entities” in a PKI?

I am trying to understand the term end-entity. Does this term just mean anybody that plays a role in a PKI system that is not a CA? So if I request a certificate from A who is a CRL issuer for ...
2
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2answers
80 views

Which signing strategy?

I have a device which should lock and unlock something after receiving a signed server response. So in the best case a loop would lock like this: User locks device User wants to unlock device User ...
1
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1answer
166 views

Dangers of client & server package, communication over HTTPS using user's own self-signed certificate?

I want to create a client & server package with the option of an encrypted connection. From my limited understanding, to get HTTPS connections working, the user needs their own certificate ...
5
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1answer
2k views

How do I make or get computer certificates to use with IPSEC user authentication on Windows?

I am having trouble and need some direction using computer certificates with Windows 7 firewall IP Security rules, using certificates only for user authentication. I can get everything to work ...
3
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1answer
1k views

how to make socat ignore client certificate?

I'm trying to set up a listener to check if an application checks the server's certificate (I'm strongly assuming it is not). So I've created a self-signed certificate fake.pem for a listener and am ...
8
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2answers
3k views

What is the difference between SSL and X.509 Certificates?

I used openssl to create a X.509 certificate but I don't quite understand the relationship between a X.509 and a SSL certificate. Are they the same? Is a SSL certificate just a X.509 certificate that ...
7
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1answer
2k views

What are the benefits and drawbacks of the HTML5 Keygen element?

As of January 2013, what are the potential benefits and drawbacks of the HTML5 Keygen element?
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2answers
674 views

Why is malwarebytes.org's SSL certificate from someone else?

I tried downloading and updating malwarebytes from https://www.malwarebytes.org but their certificate seems to be incorrect. This is the warning: This is probably not the site you are looking for! ...
15
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3answers
2k views

Multi-tenancy, SSL Certificates, and Subject Alternative Name

The X509 specification allows a CA to issue a single certificate for multiple hostnames, by using the "Subject Alternative Name" extension. From the spec: The subject alternative name ...
8
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2answers
11k views

Is there any way to get Chrome 27 to trust a self-signed cert? [closed]

I'm running latest gen Chrome (27) and preparing a demo that requires using a self-signed cert to support HTTPS on a local IIS website. The cert has been created with the correct common name for the ...
3
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4answers
6k views

Two-factor authentication w/certificate and username & password?

Example scenario: ActiveSync Authentication method: certificate-based authentication AND Active Directory domain username-password Encrypted on device: public & private key AD username ...
10
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2answers
2k views

Are there really functioning quantum computers?

I saw this video on youtube on quantum computing. It says that a company called dwavesys has already made commercially available quantum computer. I checked on the website and it exists. I thought ...
4
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2answers
125 views

Using SSL Certification in Multiple Locations

I have some issues with respect to using SSL Certificates. I have a website hosted in UK and I also have an organisation in South Africa hosting my company application online for web access. The ...
11
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1answer
147 views

How CA ensures that a certificate request is coming from me?

To establish trusted SSL connection I need to create a certificate request. For example, if I use openSSL I can do it by the following command: openssl req -new -key privkey.pem -out cert.csr ...
5
votes
1answer
188 views

Design of system based on HTTPS, Client Certificates and custom CA

I have the following system: 2 application servers. At the beginning is installed the first server and later is installed the second one. A client access from a browser to both servers Application ...
33
votes
7answers
10k views

Should I change the private key when renewing a certificate?

My security department insists that I (the system administrator) make a new private key when I want a SSL certificate renewed for our web servers. They claim it's best practice, but my googling ...
1
vote
2answers
545 views

Create a SSL certificate and sign it with a personal certificate which in turn is signed by a certificate authority [duplicate]

I have a personal certificate which is signed by a certificate authority. This certificate is unrestricted with respect to its allowed purposes. Is it possible to create a SSL server certificate on my ...
16
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3answers
2k views

What happens when an Intermediate CA is revoked?

Currently I'm working on a certificate manager that allows our product to securely connect to remote webservices (over TLS/SSL). For security, we use Certificate Revocation List checking (or ...
5
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1answer
372 views

'Trusted CA Certificates' and 'Trusted remote Certificates'

What is the difference between Trusted CA Certificates and Trusted remote Certificates?
3
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2answers
1k views

Change 'Key Usage' of a certificate

Is it possible to change the 'Key Usage' property of an existing ssl certificate of a web site? Our goal is to host a web service so that a third party can integrate with our solution, and their ...
2
votes
2answers
2k views

Force SSL/TLS client cert authentication even if server does not request it?

Usually the server specifies in the Server Hello message if a client certificate is needed/wanted. Does anybody know if it is possible to perform an authentication via client cert if the server does ...
5
votes
1answer
954 views

Use Client Certificate using Self Signed CA while using Web Certificate of a publicly trusted CA

I would like to ask if it is possible to use different CA for the client certificate and the web certificate? For example, I would use Verisign to sign my web certificate while I use my Self Sign ...
1
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1answer
2k views

Certificate authentication with jQuery's ajax() function

I need to sync with my server with the client certificate abc.pfx which is generated by the server using Ajax. How do I send my certificate with Ajax object. Can I do this certificate authentication ...
0
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1answer
439 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 ...
7
votes
1answer
212 views

Does dnssec protect against malicious registrars?

With the recent conspiracy theories around the registrar MarkMonitor Inc., the question arises, if DNSSEC protects against a registrar going malicious (or being attacked). This is especially ...
10
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1answer
424 views

Why can the validity of an SSL certificate exceed the registration period of a domain?

I can understand why one might desire to purchase a certificate for multiple years but I am left wondering why it appears to be possible to obtain a valid certificate for a domain that may have come ...
14
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3answers
243 views

Domain name expiration and TLS

If I purchase a domain name that has expired, do I have any assurance that the previous owner does not have a valid HTTPS certificate for the site? In other words, do CAs check domain name expiration ...
1
vote
2answers
235 views

Secure cookies and Path Length Constraint

Using apache 2.2.3 on oracle enterprise linux. When setting following setting in httpd.conf: Header edit Set-Cookie ^(.*)$ $1;Secure , cookie generation (which happens on our registration page) ...
7
votes
1answer
959 views

How does an end user differentiate between OV and DV certificates?

This is a very good link that explains the different types of SSL certificates and level of trust provided by them. An Extended Validation (EV) certificate it is easily identified by the green color ...
9
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5answers
5k views

A standard way to manually add a digital signature to a pdf file?

I've created a few certificates to use myself, but I find myself stumped when it comes to creating a certificate which contains a digital signature. First, how would I go about creating a standard ...
2
votes
1answer
2k views

How does an offline CA revoke certificates?

If an RSA private key of a root CA is stored offline, how does it revoke certificates it signs? From looking at OpenSSL config the default_crl_days option seems to indicate that a CRL must be ...
3
votes
1answer
555 views

Apple Developer Account Hacked?

I just did a fresh install of Snow Leopard on a newly-formatted hard drive. Logged into the iPhone Developer Page with Google Chrome (latest build) here: ...
1
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1answer
123 views

SSL Communication and Proxy

Let us say that I have a client and a server communicating using SSL. If a hacker sets up a proxy between the client and the server, will he be able to decrypt the data which is being sent?
0
votes
1answer
79 views

Determine the Identity of Caller

Let me explain my situation. I have a provider which is made up of a registration page and a web service. Online vendors (clients) register with the provider by providing details such as username, ...
2
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1answer
237 views

Sending Digital Certificates

I used the makecert tool in order to create: a self-signed certificate a server certificate using the self-signed certificate a client certificate using the self-signed certificate I then ...
2
votes
1answer
351 views

Security Certificates - Tools to Generate Security Certificates

I want to create a self-signed certificate that will be installed as a trusted certificate authority. I then want to create another two certificates which are signed using the private key of the ...
1
vote
1answer
5k views

The request was aborted: Could not create SSL/TLS secure channel Exception

Let me explain my situation. I created a self-signed certificate and installed it in the Trusted Root Certification Authorities section in MMC. I then created two certificates using the self-signed ...
3
votes
1answer
2k views

Creation and deployment of self-signed certificates for a two-machine scenario

Let us assume that I have two computers: client server Now, in the server computer, I set up a legacy ASMX web service which will going to be used by the client. Before the client can connect to ...
23
votes
2answers
14k views

What are the risks of self signing a certificate for SSL

Let's say I sign a SSL certificate for myself, and I'm not using a certified CA. What are the risks and/or threats of doing it?
2
votes
1answer
155 views

How does a function certificate work?

Say that we have a client / server solution (written in .NET). If we want to use a certificate for the TCP communication, is it enough to use one function/service certificate to encrypt communication ...
2
votes
2answers
537 views

SSL: How to send generated client certificate from server to avoid MITM?

The question I have is simply how do I prevent a MiTM attack on a certificate once the server side creates a new one and tries to send it to a client? Does the certificate get encrypted by rsa and ...
-1
votes
2answers
760 views

Generate openSSL certificates from within C code using commands?

This is an openSSL command for generating a private key and a certificate, openssl req -out CSR.csr -new -newkey rsa:2048 -nodes -keyout privateKey.key The question I have is whether there is some ...
4
votes
1answer
774 views

What is the impact of certificate validation level (or class) on deployed web applications?

Certificates can have a class level (or validation level). What is the impact of these levels on deployed web applications? More specifically: Is the certificate level included in the certificate ...
6
votes
1answer
6k views

SSL Cert Types and Key Usage

I want to use OpenSSL to create a CSR and submit it to my CA (which uses Microsoft PKI) and receive certificates that can be used for both Server Auth and Client Auth. I'm not clear on a couple of ...
2
votes
0answers
157 views

SANS Forensic Course -worth it? [closed]

I'm a Security Student at Pennsylvania State University and I am considering taking FOR408 through SANS this summer in Pittsburgh (not far from my home). I really want this to help me stand out in my ...
2
votes
2answers
575 views

Looking for general guidance on securing web API application for client applications and users

I have a web service built with WebAPI that accepts JSON requests and responds accordingly. The core architecture is built but there isn't any authentication/authorization. After a lot of googling ...
45
votes
4answers
40k views

What certificates are needed for multi-level subdomains?

I'm working on a web site with a several levels of subdomains. I need to secure all of them with SSL, and I'm trying to determine the correct certificate strategy. Here's what I need to secure: ...
5
votes
1answer
13k views

What is updated with “Update Root Certificates” enabled? What is the equivalent in Windows 2008R2?

What root certificates are/are not updated when the following checkbox is checked? Additional questions If I manually remove a root certificate, will this service replace that very certificate? ...