SSL (Secure Sockets Layer) and/or TLS (Transport Layer Security)

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What is the deal with Valicert SSL root certificates?

Does anyone know what the status of the "Valicert Class 2 Validation Authority" root certificate is or what's going on with Valicert in general? I've heard that that cert has been deprecated, no ...
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1answer
48 views

Browser and SSL support

According to http://en.wikipedia.org/wiki/Transport_Layer_Security#Web_browsers most browsers support SSL 3.0. And with my understanding (please correct me if I am wrong), when a browser just ...
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2answers
65 views

Installing self-made cert as trusted CA on windows?

I'm looking into using mitm-proxy, but part of the process of filtering/snooping SSL is that you must generate and install a root cert as a trusted CA, so that mitm-proxy can generate and throw out ...
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75 views

Reverse proxy sharing one certificate for multiple servers using Subject Alternative Name

The following is a scenario for an attack where one website can impersonate another. I am told (including by this answer) that it's impossible, but I would like to understand exactly what prevents it. ...
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2answers
71 views

Encryption mechanism

I want to send data over the Internet securely. For that, I am using an public key of the receiver to encrypt the data. In this case, if an intruder in the network modifies the data, like placing the ...
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31 views

In TLS1.2 AES-GCM mode, what happened when input is not exactly the multiple of its block size?

I know that AES-GCM mode does not need padding, and its output are exactly the length of input data plus the tagging. But I am a little bit lost, as AES itself is block cipher, it could only operate ...
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2answers
71 views

HTTPS - ssl error bad cert domain

When I try to visit some websites with HTTPS , I get the error that the SSL is self-signed and that the SSL is only valid for another domain, and that SSL is actually invalid. If the SSL is valid only ...
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1answer
67 views

learning SSL/TLS [closed]

I am looking forward to learn more on implementing SSL/TLS, can anyone of you suggest me a good source to learn about it? For now I only have basic knowledge about it such as what is SSL and how it ...
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41 views

MITM protection, key distribution

I want to make sure each of my apps users only get their own data, and that nobody tampers with it or sniffs it in a MITM fashion. Encryption of everything should be the solution, right? But how do I ...
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1answer
39 views

Save to setup localhost.example.com to test wildcard SSL?

I have a domain with a wildcard SSL certificate (i.e. "*.example.com"). I also develop using WAMP setups, which I would like to be able to test HTTPS on. There are several tutorials on how to setup a ...
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3answers
100 views

Multiple SSL server certificates

I am sort of new to SSL. During a SSL connection establishment, I see that the server is sending multiple certificates. Can someone help me to understand why the server is sending multiple ...
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2answers
109 views

Is the lack of https reason enough to abort form submission?

Preamble: Am in awe about the quality of both questions and answers on https / SSL on this site. My humble question below pales in comparison. Both on professional and amateur websites I've ...
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70 views

ChangeCipherSpec Authentication

According to RFC 5246, 7.1. Change Cipher Spec Protocol: The ChangeCipherSpec message is sent during the handshake after the security parameters have been agreed upon, but before the verifying ...
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810 views

RESTful web service and SSL certificate

We have a server that provides RESTful services to our application server. It runs on Amazon Elastic Beanstalk and mapped with a domain name and SSL certificate registered at GoDaddy. It ran ...
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1answer
198 views

Why do I need to install the startcom intermediate certificate?

I issued my server a Startcom class 1 cert. With no changes on the client, I can access this server via FF without issue. However, when try to validate the certificate via openssl s_client it chokes ...
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1answer
92 views

Do I need an SSL Certificate for a HTTP only site?

The cert for our public facing site is about to expire soon. Our site is entirely http. The site runs on SharePoint, and with SharePoint working with NTLM, the credentials that are passed over the ...
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1answer
127 views

Python SSH vs SSL? [duplicate]

I read the What is the difference between SSL vs SSH? Which is more secure? , and it mentions there is the possibility they can be affected by similar attacks. Now that the heartbleed thing is out, ...
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3answers
888 views

Secure connection failed (OCSP)

I've been getting a lot of failed connections lately, namely from Facebook and now Google (German site works, French does not). This happened to other sites as well but these two are the kind you ...
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40 views

Downloading list of pinned certificates

I'm thinking about implementing certificate pinning in a mobile app. The app will need to connect to several secure sites. Rather than having to update the app every time one of their certificates ...
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2answers
306 views

Why don't more websites implement Perfect Forward Secrecy?

From what I understand, all it takes to enable PFS on a webserver is adding ephemeral cipher suites (ones that use DHE and ECDHE for the key exchange) to the list of cipher suites used in SSL/TLS ...
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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?
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3answers
146 views

HTTP/HTTPS on the same site

Suppose a site allows connection to be established with HTTP or HTTPS .If you establish a connection to http://www.example.com or https://www.example.com then all further link's on the page displayed ...
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3answers
66 views

Is there a way to program to discover sites transmitting user/pass in plaintext (Not using SSL) for penetration testing? [closed]

I have a CSV/Excel file which in which I want to test out the links which do not have SSL but ask for Username / Password. Is there a program which determines if each site on a list encrypts its login ...
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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.
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1answer
176 views

Can closing port 80 lead to more security?

If a website is running on HTTPS only, is it reasonable to close port 80 of the web server and only leave port 443 open? Does this action provide more security for the website?
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1answer
81 views

How does a CA add www and raw domain names to my cert when my CSR doesn't have them?

I'm in the process of buying an SSL cert, and I'm confused by this part: Many CAs say they'll add www. to your domain, so that e.g. if you buy a single-domain cert app.example.com, they'll also add ...
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2answers
582 views

Is using an SSL Session ID along with a cookie based session verification more secure or not really?

I am using Django which is a web framework for Python. I love it but the session handling is cookie-based. Now over SSL I'm sure it's reasonably "secure" but I don't think there is any kind of fail ...
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1answer
74 views

From where I can get a list of trusted certificates fo HTTPS?

I am using OpenBSD with a browser named Xombrero that doesn't have SSL certs by default. Should I get the certs from the /etc/ssl/certs.pem file? (ex.: I am not trusting OCSP and don't trust that my ...
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1answer
718 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 ...
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2answers
456 views

How secure is XMPP with self-signed SSL certificates?

I'm looking for an easy way to set up a simple IM infrastructure that protects messages in transit as well as avoids having logs in places that neither I nor someone I trust controls. I'm based in ...
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2answers
103 views

Does CRIME also compromise basic access authentication?

CRIME mitigation involves disabling TLS compression. My server offers services only via XML-RPC and does not make use of Cookies, which is what CRIME exploits. Does this mean that I can turn on TLS ...
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2answers
104 views

Subdomain-only SSL security/availability

CAcert and StartSSL both only validate domains whose TLD is owned by the requester. I have a few subdomains that come from places like freeDNS that I would like to run an SSL-secured server on. Are ...
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1answer
227 views

SSL what's the client write key used in application layer?

I've used wireshark to watch serveral SSL3.0 traffic and decrypt the messages transfered between client & server. And what I've just found is very strange : AFAIK, the encryption-key, MAC and ...
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2answers
213 views

Difference between free ssl and non-free ssl? [duplicate]

I am making a choice between StartSSL and positiveSSL($4.99/yr). I want to know the difference between them. As I know, SSL is used to encrypted the connection between client and server so that data ...
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1answer
136 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 ...
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1answer
382 views

How to MiTM SSL on a device with no proxy settings

I'm trying to MiTM a device on my network and having some problems. SSLstrip doesn't work because the URL is https://, and I can't use something like Fiddler because the device has no configurable ...
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2answers
105 views

SSL/TLS Question [closed]

I am currently working on my SSL/TLS assignment and I got a question to ask. What is the use of a login password since it is not needed for establishing secret communication between your computer and ...
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1answer
104 views

Which URL is revealed when using wildcard SSL?

Assume there are two servers; server1.com has a standard SSL certificate installed and server2.com has a wildcard SSL certificate (*.server2.com) installed. Next, assume you make from server 1 via ...
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1answer
1k views

“Must have” and “Preferred Cipher” suites terminology

I have received the following advise to set cipher suites to suitably mitigate Beast attack on a newly setup Apache HTTPD server. Preferred ciphers: RC4-SHA, RC4-MD5 Must Have Ciphers: ...
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1answer
579 views

Configuring SSL certificate on OS X 10.8.5 produces “Chain issues Contains anchor” error

I'm trying to install a Thawte SSL123 certificate on OS X 10.8.5, but having a difficulty. While the certificate and intermediates appear to be installed without any errors, running the Qualys SSL ...
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1answer
913 views

Why Qualys SSL Server Test is giving me 80 and not 100 in Key Exchange?

My openssl ciphers -v 'CIPHER' output is the following: ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(256) Mac=AEAD ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA ...
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3answers
767 views

On a public wifi I just tried to access google over HTTPS and was forced on to HTTP, how?

I'm on a coffee shop wifi. I just typed https://google.com in to my browser and noticed that I got redirected to http://google.com. I tried other google domains (google.ie) and these work fine, so ...
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1answer
132 views

Can the random keys generated during handshake be guessed

During the handshaking of an SSL connection, the server sends its public key, the client generates a random password, encrypts it with the pk, and sends it back, then the server decrypts it and all is ...
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1answer
28 views

How come MIM is getting through outlook SSl security

Hello I am using outlook with ssl security to connect to a mail server but whenever I launch a MIM attack and accept the fake certificate my password is shown. How is this possible? Shouldn't I be ...
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2answers
87 views

Do keyservers keep logs of who adds whom to their keyrings?

Maybe it depends on the keyserver. Does that pose privacy issues?
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1answer
473 views

Is TLS secure when full eavesdropping on the network occurs? [duplicate]

Possible Duplicate: How is it possible that people observing an HTTPS connection being established wouldn’t know how to decrypt it? Alice connects to Bob's site via a TLS secured connection ...
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1answer
1k views

DrayTek Vigor 2920 HTTPS allowed

In my office we have a DrayTek Vigor 2920 router, with CSM setup to only allow certain keywords (keyword objects) to certain IP groups. This all works fine, however we've discovered that all HTTPS ...
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1answer
461 views

Behavior when validating an expired certificate chain

I have the following situation: A server certificate (CServ) is signed by self-signed certificate (C0) A client certificate (CCli) is signed by CServ Client's trust-store contains C0, so the client ...
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1answer
131 views

Can IE be made to imitate the behavior of Chrome's KeyGen element?

Is there any way I can repurpose existing ActiveX controls or functionality to get IE to work with the KeyGen element? Assistance getting Safari to work with this optional HTML5 spec would be ...
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1answer
5k views

How to create trusted chain of certificates if I have the last certificate?

Good day. During last two weeks i had been trying to create my xmpp client app which will be connect to the xmpp server via TLS(because server it's using) My server is: telnet xmpp.odnoklassniki.ru ...