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.

learn more… | top users | synonyms

0
votes
1answer
143 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, ...
2
votes
3answers
192 views

How can I know when a certificate was created?

I want to know whether my various providers changed their certificate because of Heartbleed, or they are using an old vulnerable certificate. How can I know that? Is the "valid from" date also the ...
1
vote
1answer
323 views

Would there be MITM attack even fix the heartbleed vulnerability? [closed]

I have read this post askbuntu, the step to fix the heartbleed vulnerability almost: 1. upgrade openssl. 2. generte new keys. 3. revoke the old certificates. Some posts say attackers may have got ...
2
votes
1answer
87 views

Which Browsers support TACK?

TACK is an IETF draft that allows certificate pinning for a TLS web server, provided the clients' bowsers support it. Unlike the certificate pinning feature available with HSTS preloading, the ...
1
vote
2answers
86 views

Should every SAML identity provider provide a unique public certificate to the service provider?

When accepting public keys from someone setting up an identity provider for access to resources protected by a service provider using SAML 2.0, do you absolutely need to have a unique certificate? Is ...
1
vote
1answer
114 views

Certificate services will not start with “server is offline” error [closed]

I have a subordinate CA. The Enterprise root service was uninstalled from the network by accident and then migrated to a new box using the same key. This new server has a different server name. It ...
5
votes
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 ...
0
votes
1answer
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 ...
2
votes
1answer
489 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 ...
2
votes
1answer
95 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 * ...
2
votes
1answer
102 views

How secure is PKCS #12

I need to move user cryptographic identity between several user devices. In the operating system I have only one option: use password-protected PKCS #12 to import the identity to the OS secure store. ...
0
votes
1answer
144 views

Accepting an untrusted security certificate?

What is the risk of accepting an untrusted site security certificate in your browser if you're not entering any data, but merely browsing the site?
1
vote
3answers
279 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 ...
1
vote
2answers
508 views

Self-signed SSL certificate on chromebook (and android)

I am having the following problem on both my android phone and on my chromebook. I'm running a website on an internal server (10.3.3.3) using nginx with a self-signed ssl certificate. Since it is just ...
2
votes
1answer
584 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 ...
3
votes
1answer
95 views

Public keys without the certificates

There are two clients and a server. Each client generates an RSA key pair and uploads public key to the server. The server associates the public key with the user identifier that is specified during ...
1
vote
0answers
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 ...
0
votes
1answer
77 views

Good reason to continue using fraudulent certificate?

A relative of mine used a favorites link to login to yahoo. The favorite link is https://de.mg40.mail.yahoo.com/neo/launch? However, this link uses a fraudulent certificate. Visiting the Yahoo ...
0
votes
3answers
273 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 ...
0
votes
1answer
109 views

My WCF application uses 2 way certificate message encryption - does it still need SSL?

I have a WCF service configured to use two-way certificate authentication on the messages. The server is also locked down through a firewall to only allow traffic from a single IP:Port that the ...
1
vote
3answers
146 views

Https forms on tens of domains

What is the optimal way (cost-wise, too) to secure page forms (https) on a large number of domains&subdomains? Are certificates required for all domains? Is putting all the page forms on a single ...
17
votes
2answers
2k views

How can you prevent employees of your company from creating valid ssl certs? [duplicate]

When registering for an SSL cert, I was able to validate that I "owned" the domain I was creating the cert for by having a valid @domain.com email address. If I worked for a large company, say ...
0
votes
1answer
81 views

Secure Communication Between .Net Application and Website

Recently, We developed an application that we want it's users to pay for a monthly subscription in order to use it. So the first thing that came to our minds how to implement a secure way for our ...
5
votes
2answers
460 views

VPNs vulnerable to MiTM because ANY certificate goes

I spoke to a sysadmin in a business center today who intended to basically perform a MiTM (as he called it) on every connection in his network because people in his office building are using VPNs and ...
5
votes
1answer
602 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 ...
2
votes
1answer
153 views

What's the use of certificate on Load Balancer and Keystore on Service?

Consider a scenario where my service is using a keystore made of self signed cerificate and the load balancer which is balancing traffic for service is binded with a CA approved certificate. I would ...
1
vote
0answers
46 views

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 ...
1
vote
1answer
100 views

Is there any way to restrict multiple access to my server at the same time using one client certificate?

My Server is Windows 2008. Mr. X is accessing my web server using Mr. X's certificate. In that time, an outsider is also trying to access my server using Mr. X's certificate (somehow he got it). Is ...
1
vote
3answers
149 views

Howto pass overly protective corporate firewall

My Corporate Network was always being monitored, but a few days ago they started to block and censor all HTTPS traffic. Recently IT guys forged certificates for all major HTTPS web sites and acts as a ...
36
votes
2answers
7k views

What exactly does it mean when Chrome reports a certificate 'does not have public audit records'?

When visiting Gmail in Chrome, if I click on the lock icon in the address bar and go to the connection tab, I received a message 'The identity of this website has been verified by Google Internet ...
0
votes
2answers
1k views

PHP encrypt and decrypt with certificate

I am trying to think of the best way to encrypt and decrypt a message between two servers. I have found a lot of examples where people simply use a secret and PHP's mcrypt... ...
1
vote
0answers
63 views

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 ...
1
vote
2answers
81 views

How to prove the integrity of a digital file if certificates are not an option

Certificates are a fantastic way to prove the integrity of a file - provided that they have been signed from the beginning. This methodology can prove the files authenticity, in addition proving it's ...
1
vote
1answer
160 views

Risks associated with distributing encrypted private key with our software?

Our software contains two executables that need to serve data over SSL (and several that need to do requests over HTTPS)). I notice that it is distributed with some .PEM files created with OpenSSL. ...
2
votes
1answer
96 views

SSL certificate to protect spoofing of API server

I have a program written in Python that checks the validity of its license key with a remote server. Am I right that an SSL certificate would make it possible to prevent spoofing (host redirects for ...
2
votes
1answer
94 views

Does using Chrome bypass the Apple iOS gotofail bug ?

Does the recent certificate gotofail bug affect me if I'm running version 6 of iOS, but only use Chrome as my browser?
22
votes
1answer
2k views

Why does Firefox not trust this US government SSL certificate?

Shouldn't this be a trusted certificate considering it's a wildcard SSL certificate? That is, shouldn't *.delaware.gov cover www.corp.delaware.gov?
1
vote
2answers
297 views

Does Google use extended validation certificates

I just changed a password on a Google account while using the Chrome browser. After doing so, I noticed that the https connection to Google was not highlighted in green signifying that it was an ...
0
votes
1answer
92 views

X509 Certificate Thumbprint

Does an issued X509 certificate have a thumbprint (hash) included as one of the items in the X509 certificate?
3
votes
2answers
140 views

Signing my certificate by using my smart card and eID card?

In Belgium we have electronic identity cards (eID) issued by our government. They can be read by a smart card reader. On the card are two certificates, one for signing and one for authentication. I ...
1
vote
0answers
127 views

“Keyset does not exist” when using SignData function with RSA

"Keyset does not exist". I know that there are tons of question about this error, but mine is totally different. I'm not gona use the key from windows certificate store, but load the public key & ...
1
vote
2answers
71 views

Mechanisms to offer inexpensive https to all second level .wiki domains

I'm working with the registry for .wiki, a new generic top level domain set for public availability in June 2014. We're going to be giving away hosted wikis to registrants of .wiki domains and I'd ...
1
vote
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 ...
0
votes
1answer
57 views

How to modify a certificate using getTBSCertificate() method

I want to show that if I modify one bit or byte from a given X509 certificate the signature verification results false (because this modification results different hash value from the certificate). ...
1
vote
0answers
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 ...
0
votes
1answer
258 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.
1
vote
1answer
323 views

How to diagnose No Certificate alert

I have written an application (in C#) to communicate with one of our customers via a web service. Our customer requires us to use bi-directional SSL. The customer has sent us their certificate (in ...
3
votes
3answers
172 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 ...
1
vote
1answer
160 views

valid PDF signature without using hardware HSM or usb Token

I have a DMS system(alfresco) that needs to sign approx 50.000 valid signatures a year. The signing certificate needs to be acquired from one of the affiliated sub-CA's. So according to the Adobe CDS ...
0
votes
1answer
394 views

Convert RSA SSH public key file into x509 certificate

I have a RSA SSH public key which I have converted from a x509 certificate and I want to be able to convert the SSH key back into a x509 certificate to compare the values with the original ...