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

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4answers
243 views

Why isn't there a Global Root for SSL?

I was just wondering why there is a file on your computer implementing the trusted root CA's instead of something similar to DNS where there is a file on root servers that computers check against to ...
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0answers
37 views

Writing Security Functionality Requirements [closed]

Is there any Guideline Doc. or Tutorials for writing Security Functionality Requirement (Common Criteria)for a product?
4
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3answers
360 views

Certificate Transparency

From what I read here, if the intermediate CA has been compromised, a fake cert can be issued and the privacy of the end-users could be compromised as well. In order to remediate this situation, ...
0
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1answer
1k views

Grey vs Green padlock in address bar - technical difference [duplicate]

What is a technical difference between "grey padlock" and "green padlock" in URL bar in browsers? As an example we can take: Green padlock: Bank of America Grey padlock: Google Search Both of ...
2
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2answers
195 views

Can I buy a signing-valid certificate for internal use?

So now that I have to implement "secure transport" as defined by The Direct Project (not to mention reinventing a bunch of wheels, but that's another story for SO), I find myself staring down the ...
0
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2answers
585 views

Security Certificate not from a valid authority

I have no real knowledge about this stuff so I figured I'd ask here for some answers. So I started to get this "Security Certificate not issued by a valid authority" error when using my email client ...
3
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4answers
344 views

Evil certificate authority in public-key-infrastructure

Alice goes to the certificate authority (CA) and registers her public key for signature verification. She gets a certificate for this from the CA. Bob requests Alice' public signature verification key ...
0
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1answer
245 views

SSL (TLS v1.2) - Can i offer fallback CAs when upgrading Certificates? (Java)

I am currently developing a product that involves two network situations. At the client side, multiple computers form a P2P network (multiple locations, multiple p2p networks), and a subset of nodes ...
14
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4answers
15k views

how digital signature verification process works

I am not able to understand that how the digital signature is verified. I know that digital signature will be attached to the message and sent by sender to receiver. then receiver uses the public key ...
13
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1answer
3k views

How does OCSP stapling work?

I've been looking into OCSP stapling for HTTPS, which looks pretty interesting. From what I can tell, it's essentially a way of offloading CRLs from the CA to the server, allowing for everything to be ...
0
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1answer
71 views

Certificate for Email Encryption and signing

I don't understand the flow of Digital Certificate with Email Encryption and Signing. For Example, There is 2 users, Sender A and Receiver B. Is Certificate required to encryption to A or just ...
6
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1answer
547 views

Browsers silently adding trusted root certificates in Windows

When accessing https://internetbanking.caixa.gov.br (site of a well known bank in Brazil), the server returns a certificate signed by "Autoridade Certificadora Raiz Brasileira" (Brazilian Root ...
0
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1answer
119 views

Should all Server Certificates from one CA have the same CRL

I am setting up my own PKI, and I came across a question to which I couldn't find an answer. I want to specify CRLDistributionPoints in my server certificates but I am curious whether to use the same ...
0
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1answer
196 views

How does ssl prevent MITM attacks [duplicate]

My understanding of how it works : A victim asks for the public key of a server. The attacker just forwards this request. The server now responds with a certificate which contains the Public key. The ...
3
votes
3answers
661 views

What stops a hacker from installing it's own CA certificate?

Taking a look at this (now rather old) article about the generated rogue DigiNotar certificates, it states the following: ...Such is the case with that small company in the Netherlands, ...
1
vote
2answers
122 views

Is there any point to keeping a “Verified by X” image on the page for a page secured by SSL?

So, I saw this on a page: (The redacted part says the name of the entity that owns the domain) The page recently got SSL certs verified by GeoTrust. The image is on ...
25
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5answers
10k views

Where to get an SSL certificate for personal website?

I would like to use https to login to my personal webpage (which is on shared hosting). So I went over to google and started searching for sollutions. Eventualy I found out that I need an SSL ...
3
votes
4answers
258 views

Trust among the root-CAs

The system of CAs with the root-CAs and their subordinate CAs are IMHO in principle akin to the system of banks with their main sites and subsidiries. In the case of banks, a customer of a bank ...
2
votes
1answer
627 views

Different SSL states as seen by Safari, Chrome and Firefox

Today, I visited some sites of the German DHL group. While Chrome and Safari complain about an invalid certificate of Firefox accepts it. Which one is right, which one is wrong? Which decision ...
2
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3answers
223 views

Do on-demand SSL certificates exist?

A few days ago, I visited an SSL protected website. Since Safari complained about the SSL-certificate, I did a short inspection: The certificate was issued by GoDaddy in just the minute I ...
3
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2answers
629 views

Possible to use a YubiKey in HSM mode to secure a Windows CA infrastructure?

I'm looking for a low-cost Hardware Security module, and discovered that YubiKey has a HSM mode. I'm not entirely clear if this HSM mode is what I'm thinking, but I'd like to use it as the offline ...
4
votes
1answer
543 views

Is possible that a TLS server send more than one certificate to the client for the same site?

What I'm trying to archive is enable ECDSA and DSS ciphers in my site, but at the same time not depend just of self signed certificates, so I could sent to my client more than one certificate and them ...
11
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1answer
366 views

Is using a CA more secure if I'm self-signing anyway?

We have a web application that we run for clients at their booth on fairs. The communication between clients and the server was done over HTTP until recently. We're currently working on improving ...
1
vote
3answers
167 views

Where can I find all SSL CA certificates

I am working on an SSL implementation project and ofcourse I need to verify the certificate presented by the server. To do that I need CA certificates or at least root CA certificates (correct me I am ...
0
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1answer
145 views

SSL Auth to proxy using Certificate on Client-side

The question may need to be reworded. The server-side is set up with Squid3 acting as an Authenticating proxy by way of LDAP. I did this for testing purposes to make sure everything was working. I ...
4
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1answer
87 views

What is the meaning of http://uri.etsi.org/TrstSvc/eSigDir-1999-93-EC-TrustedList/SvcInfoExt/RootCA-QC from ETSI TS 102 231 V3.1.2

From Technical Spec http://uri.etsi.org/TrstSvc/eSigDir-1999-93-EC-TrustedList/SvcInfoExt/RootCA-QC a Root Certification Authority from which a certification path can be established down to ...
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2answers
133 views

SSL-certificates for overlapping domain regions?

Suppose, a server hosts https://www.master.com/ and thus is equipped with a (single domain) SSL certificate. Furthermore, suppose there are some web apps below master.com: ...
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4answers
4k views

What alternatives are there to the existing Certificate Authority system for SSL?

Whilst the current CA system works very well for a lot of people, it does put a lot of power into individual CAs' hands, and makes a CA hack potentially devastating for customers and business. What ...
6
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4answers
3k views

Can an intermediate CA be trusted like a self-signed root CA?

Is it possible within the limits of the X.509 specification to mark an intermediate CA as trusted for a specific purpose, e.g. to verify a VPN, HTTPS etc. server key, just like it would work with a ...
2
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2answers
4k views

Public Key → Certificate?

Is it possible to convert a public key to a certificate using the public key only? I've seen the following, which takes a private key to form a cert request, which can then be self-signed: openssl ...
3
votes
3answers
668 views

Where to get/buy a CSR generated S/MIME certificate

I'm not sure if the question is eligable for this board as I ask for concrete service providers which can be kind of advertisement, but there is also technical issue involved, so I give it a try. My ...
3
votes
1answer
212 views

Remove CA from trusted CAs list while trusting it older certifications

Lets say that some certificate authority changed her security policy and we don't trust her new certifications. Is there any convenient way for an organization to remove this certificate authority ...
3
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2answers
540 views

Inspecting a TLS Certificate to determine RSA Key Usage restrictions

With regard to this answer, I have a question about Key Usage in an SSL certificate. Most SSL server certificates have a RSA key which is not restricted through a Key Usage extension, so you can ...
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3answers
2k views

Can a wildcard SSL certificate be issued for a second level domain?

Something like *.com or *.net? How about *.edu.au? The RFC 2818 does not say anything about this topic.
0
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1answer
3k views

Why IE/Windows forces you to install self-signed certificates as root CA to make them work?

In old versions of IE/Windows you could install a self-signed certificate for a web site and it just worked: the warnings disappeared. In more recent versions (and with Chrome) this just didn't work. ...
8
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2answers
2k views

Obtaining an S/MIME certificate without disclosing my private key to the TTP

I would like to obtain a trusted S/MIME certificate, but all the certificate authorities I have asked so far generate the keypair on their server, sign the certificate and send me both the private key ...
4
votes
1answer
108 views

Are there any public examples of an encrypted attribute in a Verisign-issued certificate?

This Credentica- UProve paper describes how Verisign issues (or did issue in the past) certs with encrypted attributes: "VeriSign issues certificates that contain encrypted attributes that can be ...
5
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2answers
795 views

Root SSL certificates and browser support

I have given three certs to be install on nginx AddTrustExternalCARoot.crt PositiveSSLCA2.crt www_example_com.crt So I concat them into a chained cert cat www_example_com.crt PositiveSSLCA2.crt ...
1
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1answer
259 views

Generate CSR with 2 OU Names

I have to create an application which generates a CSR. While generating a CSR we are required to fill in several details like CN, OU, etc. The problem is that the Certifying Authority to which I have ...
1
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1answer
1k views

Windows' default certificate store for intermediate vs trusted root certificates - my self signed root CA cert goes to 'intermediate' by default?

Is it possible to create self-signed root CA certificate that Windows will import to Trusted Root by default instead of Intemediate certificate store ? Obviously, it won't do it without the big giant ...
8
votes
1answer
571 views

Force a subordinate CA cert to be signed to include a the CRL distribution point extension?

How can I attach a crlDistributionPoints parameter when signing a CSR I've generated as follows: openssl req -new -key /root/ca/private/private.key -out /root/public.csr I usually sign with: ...
3
votes
2answers
497 views

Should I customize my Root CA's thumbprint/fingerprint? (SHA1 or MD5)

My goal is to make a certificate's thumbprint "easier" to verify, and not reduce security in doing so. Given that the RSA-based Bitcoin technology has a concept called a "Vanity address" where the ...
9
votes
4answers
417 views

How to stop/detect someone else registering a certificate for my domain

With the proliferation of low-cost automated CAs what can be done to mitigate the attack of someone doing a spear phishing attack to get a login to our webmail system, then using an automated service ...
5
votes
3answers
2k views

Why are Certificate Revocation List periodically renewed?

While studying a security course I have been asked this very question: Why are CRL periodically renewed, even if there are no new revoked certificates to add to the list? Honestly I can't find the ...
5
votes
3answers
716 views

Why do we allow SSL certificates to be replaced before their expiry date, without revokation of others?

Imagine a situation where a rogue CA creates a certificate for your site. Since the user's browser trusts the CA, it will accept the certificate without any fuss. However, the site's real certificate ...
11
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1answer
2k views

Renewing Microsoft Certificate Services Root Certificate

We currently have Microsoft Enterprise Certificate Server installed on a domain member machine which issues 1 year certificates to users for authenticating to VPN. We'd like to start issuing web ...
8
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1answer
1k views

Moving from a one tier to a two tier Microsoft Certificate Authority hierachy

Right now we have a single Microsoft Enterprise Root CA which issues certificates to our VPN users for two factor authentication. We're planning to extend use of the CA to issue certificates for RDP ...
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2answers
4k views
4
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1answer
3k views

AIA/CRL locations for Offline Root

I've read the answer to the following "Checklist on building an Offline Root & Intermediate Certificate Authority (CA)" and I have one questions based on the system I am trying building It's an ...
151
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7answers
13k views

How do certification authorities store their private root keys?

Knowledge of a CA private key would allow MitM attackers to transparently supplant any certificates signed by that private key. It would also allow cyber criminals to start forging their own trusted ...