A Certificate Authority is the collection of hardware, software, and people responsible for issuing certificates in a hierarchical PKI. CAs may be public, as in SSL / TLS and government IDs, or private, as in corporate infrastructures. The primary responsibility of a public CA is to verify the ...

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is x509 certificate signed by ca valid?

I've got certificate 'sample cert' which is valid to '2015-12-31' but it was signed by root CA certificate. But when it was signing CA cert was valid to 2015-06-30'. So my question is, is today ...
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3answers
56 views

Methods for immediate certificate signing

I'm an absolute newbie in the enterprise CSR and certificate generation process. So kindly point out any obvious silliness in the question. Is it possible to completely automate the process of CSR ...
2
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1answer
160 views

Security Structure of an API

I've been developing a web application and APIs for 8 months. I implemented OAuth 2.0 client credentials for authentication. And now I have to implement TLS to my APIs. I've been dealing with SSL/TLS ...
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1answer
66 views

Digital Certificate Repository Integrity

I am trying to figure out if there is an automatic way to determine if a digital certificate repository has been tampered with. Does anyone know of a way to do so?
2
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1answer
88 views

Is client cert authentication with a 3rd party PKI cert any safer than using self-signed?

I am working on a small M2M project (a few hundred nodes connected to a single cloud server), and want to use client certificate authentication, with each client getting its own unique cert at ...
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76 views

Website Implementing https site w/ self signed certs and CA

Q: How best to handle the issue of security warnings for a website using certificates from its own CA (ie, selfsigned)? I am some what torn on how to do this - I have a number of implementaiton ...
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2answers
109 views

Is it possible to use an open collection of default SSL certificates for my browser?

Browsers and OSes come with a set of default SSL certificates for well known organizations, such as root certificates from CAs. I understand that the trust model is as follows: I pick (actually my ...
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1answer
1k views

How will SHA1 deprecation affect SHA1 roots in OS/Browser trust stores.

I understand the SHA1 deprecation policy applies to CA's issuing SHA2 end-entity certs and intermediates starting Jan 2017 but how will this policy affect the actual root certificates in OS/Browser ...
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1answer
297 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 ...
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2answers
709 views

Certificate authority structure - best practices

I'm working for a company that sells software products to customers some of which do not have the resources and/or know-how to build and maintain their own CA (used for the SSL communication of our ...
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1answer
152 views

Curious about best start for autoresponding Certificate Authority (CA)

I am just getting started trying to implement some internal PKI ideas, where my app would need a cert to 'sign' messages. Since this is all completly internal, we have some degree of trust, and I ...
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0answers
79 views

Windows certificate verification with timestamping

I have been trying to replicate the behaviour of the Digital Signatures tab on windows file properties. I'm using WinVerifyTrust api and X509Certificates namespace to achieve my goal. I've managed to ...
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0answers
98 views

Client authentication using the pfx not working

I have a requirement to generate the client certificates(pfx) files from another server certificate which are provided by a CA. Firstly I tested the following based on ...
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0answers
39 views

Let users sign in with eIDs - do I need government authorisation? (scope: all nation-states)

I've decided to launch a crypto-basic income system. Crypto UBIs are pretty popular now. For me, it seems like an open nation-state ID should exist by now (2015). However, Mike Hearn, Bitcoin ...
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0answers
73 views

Security implications of CA signed SSL cert for local development

Curious to know the security implications and potential risks involved with getting a CA signed cert for localdev.mydomain.com, and issuing it to all the developers who might need to spin up a local ...
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1answer
1k views

Extract the content of PKCS7 file in Java

I have a PKCS#7 signature that have the content‐type signed data and it embeds an XML document, and I have to extract the xml document from this PKCS7 file. Anyone know how to do that in java ??
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0answers
17 views

Trust CA and parent CA, but not other derivative CAs [duplicate]

I've got a problem with a client connecting to a server through an SSL-secured socket. The problem is with my requirements and the way the certificate chain gets validated. I've got three CAs to sign ...
2
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1answer
268 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 * ...
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1answer
328 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 ...
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4answers
675 views

Can a certification authority sign another CA's certs?

Disclaimer: I have low knowledge of X.509 and PKI, so I would appreciate an answer that is not entirely technical, i.e. by using real-life example scenarios.) I was searching for information ...
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3answers
1k views

Benefits to using EV certificates with a privately hosted Certificate Authority

For companies that have implemented their own internal CA, is there any benefit to configuring that CA to issue an EV certificate? Do any SSL Proxies (like Bluecoat) mimic the EV certificate of the ...
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2answers
684 views

Can a wifi provider decrypt HTTPS usind MITM without users noticing? [duplicate]

As a router, can I send forged certificates, and intercept requests to CA and return responses that they are valid. So I could MITM all https traffic, and spy on my users?
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1answer
554 views

How to become an internationally recognized certificate authority (CA)?

What's the procedure a certificate authority (CA) must follow to get internationally recognized, like Verisign or GlobalSign?
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2answers
136 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 ...
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2answers
237 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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2answers
119 views

What is the purpose of SSL Certificate Authority (CA)?

What is the purpose of an SSL Certificate Authority? How would a CA prevent dishonestcompany.com from doing something dishonest? What does the CA signing of the SSL/TLS cert for ...
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1answer
143 views

What does browser do when it queries xxx.example.com and it gets a certificate for yyy.example.com(top level domain is same)?

The question is actually about what level of validations browser does when it gets certificates of some other domains like case 1: Accessing abc.google.com and got def.google.com case 2: Accessing ...
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2answers
133 views

Why/when would a CA make a generated public key available to the public at large?

I'm confused about this section in my CEH security exam training material: A CA is able to perform a number of roles in addition to the validation process outlined here. Some actions that a CA is ...
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1answer
65 views

What is Autocsr and is it secure?

I read an interesting article about something called autocsr for SSL certs. After reading I still could not figure out how it works. Doesn't generation of CSR happen on my box? The CA won't have ...
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2answers
198 views

Difference between KMS and PKI

While the PKI System deal with digital certificates life cycle and Key Management System (KMS) deal with keys life cycle. What is the the fundamental difference between them? Is it possible to ...
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3answers
128 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 ...
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2answers
324 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 ...
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2answers
20k views

Error code: sec_error_untrusted_issuer

I need help with a security issue concerning this code that has just been popping up recently as I visit my favorite websites. Based on some past history I KNOW something is not right, and I am not ...
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2answers
100 views

Verification of client certificates

I've read a lot of articles about client certificates. Please correct me if I'm wrong: client certificates are issued using CA CA could be created by myself (self-signed) or bought client ...
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3answers
539 views

Using self-signed certificates for your mail server

I have read multiple Q&A's on this topic from here and other SE sites. They all mention self-signed certs are not recommended due to MITM attacks. However, I haven't found anything with mention of ...
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2answers
208 views

Can revoked certificates be “lost” if the base CRL is updated before expiration?

Assumption Suppose I have a CA that issues a base and a Freshest CRL. I also understand the Freshest CRL to be a Delta of revoked certs in the base. I also understand that clients should pull the ...
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2answers
484 views

Are there other roots of trust on my computer aside from these 46 root certificates?

I've heard many people imply that modern browsers and OSes trust a myriad of root certificates. The implication is that it is impossible to ensure the private keys of all of the root certificates ...
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2answers
104 views

Is there a Standard Verification process for Certificate Authorities to follow?

So the premise of the question is to quantify the risk of wild card certificates versus regular certificates. From my research the greatest fundamental danger of wild card certificates is the ...
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1answer
197 views

Is a SSL CA signed certificate necessary when connecting with IP Address?

I'm currently creating a socket server, and would like to encrypt communications. The thing is, the client will connect directly to the ip without any DNS. (Every user will know the Server's IP ...
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2answers
179 views

Will CA's still validate internal IP's in SSL certs?

Just wondering what Certificate Authority (CA) policy is nowadays on validating someone's internal IP address in a certificate? I have heard that some CA's used to do this but won't anymore.
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2answers
6k views

Unrecognized leaf certificate

Every 15 minutes or so I get this message in my system.log Apr 25 22:05:36 Ivans-MacBook-Pro.local apsd[194]: Unrecognized leaf certificate Apr 25 22:20:57 Ivans-MacBook-Pro.local apsd[194]: ...
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2answers
69 views

is it possible to issue a sub-CA and trust it only?

I'm currently a hobbyist trying to learn more about SSL. If I create my own CA for my virtual servers, and trust that CA on my devices, I can then issue certificates for my virtual servers, and my SSL ...
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1answer
62 views

Relationship between SSL cert database and that at the CA site

Say I am using a trusted third party CA site to manage my cert. I created a new cert called CertA at the CA web interface, downloaded the signed cert and use it on my web server. Some time later I ...
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1answer
46 views

Certificate authority has changed for personal website - but I haven't changed anything?

I have the Certificate Patrol addon (website) installed in Firefox. While I mostly ignore the (far too many) warnings, today I saw that the certificate authority for my personal website has changed. ...
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1answer
228 views

How to extend x509 certificate validity

I have two x509certificate, and now they are expired. What I would do is to extend the validity date of these certificates (I don't want t creat new one). Can I do this with openssl or other tools ?
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1answer
56 views

Using a minimal set of certificate authoraties

It been known for quite a while now that SSL is more of a security-illusion than a real one. As it's not completely useless, and there's no real alternative at moment (though convergence looks ...
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3answers
2k views

How does DCOM authentication compare to RPC based authentication/auth?

The following paragraph from MSFT Best Practices for 2003 PKI says Windows 2000 authenticated via RPC vs 2003 that authenticates using DCOM A CA running Windows Server 2003, Enterprise Edition, ...
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2answers
155 views

Does Convergence solve the problem of hacked CAs?

My question is about the Firefox AddOn Convergence. So my question is if it is possible for convergence to observe that a phishing-site which is verified by fake Certificate because a hacker of a CA ...
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1answer
91 views

Letsencrypt not valid in Firefox or PHP, but valid in Chromium

I just moved one of my websites to https, using Letsencrypt. I am using Linux, and my Chromium correctly verifies website certificate, but Firefox shows it as invalid. I also have an API on the ...
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1answer
33 views

How is PKCS#10 and x509 related?

I'm unable to make sense of them using the RFCs. Can anyone help? When I use this function, http://www.pyopenssl.org/en/stable/api/crypto.html#x509req-objects , am I creating a PKCS#10 format CSR?