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

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{Secure} Telnet connect to a console server from webbrowser

I've got a terminal server set up in a data center that also serves as a console server. This console server only accepts regular telnet requests. To this server are a bunch of routers and switches ...
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1answer
49 views

SSL - Main and Child servers network

There is an embedded device which acts a client. It communicates to a server via POST method whenever it has any data to be transmitted to the server. Embedded device: 1. Acts a Client 2. Does not ...
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125 views

Can't I forge an SSL certificate? [duplicate]

I read What's keeping a malicious man in the middle server from forging a valid certificate?, but when the client goes to verify the certificate, can't an attacker intercept that connection and say ...
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79 views

Why the Websense blocks same site when used with http & not when used https? [closed]

I have been working in a IT firm. I have access to some social sites. When I try to open site Links in mail (that are having http://), the websense prompts me that the access is blocked. However, when ...
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327 views

Android support for TLS 1.1

Do anybody know from what version of Android did TLS 1.1 started to be supported directly by the OpenSSL version preinstalled in the system?
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119 views

Authentication between two internal servers

I have two internal servers that are going to communicate with each other; they speak HTTP/TLS. Is there a best practice for authenticating communications between internal servers? Short of a best ...
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61 views

BREACH attack and content length

I've been researching BREACH, and while I can understand how it might work if you have access to the the browser (to send crafted requests) and the wire (to capture compressed response length), I ...
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1answer
54 views

Early ChangeCipherSpec Attack

For the early ChangeCipherSpec attack, the attack would affect client with all version of OpenSSL and server with OpenSSL version 1.0.1 and above. My question: If two mail servers are communicating ...
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1answer
70 views

How to convert SSL Certificate for mobile app?

I am in the current process of renewing my SSL cert for my website. I also have a mobile app for my site. I want to use the same cert from my website in my mobile app. How can I do this? Thanks - I ...
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62 views

Can I change the CSR of my SSL certificate?

I have 2 SSL certificates that are generated and being used for our staging and development server. However, we wish to change the roles of these two servers. currently the staging server is using ...
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1answer
55 views

Entering payment information in Android Apps

I'm concerned how android apps that integrate payment processing deal with secure financial information.When purchasing through these apps the apps show the Webpage of the bank asking for credentials. ...
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97 views

Self-signing client certificates and distributing them, is the following a sound procedure?

I have a case at hand as follows: There is a number of clients in Internet (i.e. untrusted channel), initially in hundreds but growing in numbers. There is a server doing processing related to these ...
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1answer
197 views

CSR from IIS 8 and Keeping my Private Key a Secret

I've been trying to understand something. When you generate a CSR from IIS, how is the private key kept as a secret, or is it? Do CA's email you a certificate that includes your private key? Because ...
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series of SSL errors across multiple sites — reason for concern? [closed]

Rebooted my rMBP late 2013 recently, and saw a set of SSL errors (unable to verify certificate) across a wide range of sites (google, gmail, mubi, medium) and also in the Calendar app as it tried to ...
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228 views

Questions about self-signed Certificates' Fingerprints and Client-Server Interaction through SSL

I have some questions about how the fingerprint function is performed. First of all, I have some knowledge about cryptography. However it seems to do not be good enough to understand hundreds of ...
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4answers
316 views

Are there any reasons for using SSL over IPSec?

is it recommended to use both protocols together? In which situation?
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1answer
72 views

Is code-signing with a non-ssl timestamp unsafe?

Assuming your code-signing tool is secure (e.g., does not suffer from buffer overflow exploits and the like), is there any reason to be concerned if a time-stamping service is not running over SSL? ...
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69 views

what harm can a malicious ca do?

If ca's act in the interests of an eavesdropper, what is the worst they cold do? I guess they can decrypt traffic not using perfect forward secrecy and impersonate the server. Is this the case?
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538 views

Does an HTTPS proxy encrypt traffic between proxy client and server for HTTP requests?

To bypass censorship in a DIY fashion, I plan to set up private proxies for my personal use. One of the possible methods I would try is to use an HTTPS proxy (not a web proxy, to be explicit) hosted ...
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100 views

Certificate pinning in a browser

I am trying to understand certificate pinning. Google started adding a whitelist of CA certs that they use for their certificates and if a cert for a google service is issued outside of this list ...
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686 views

cURL cert validation with curlopt_cainfo not working

I want to validate my SSL certificate each time I run API calls. I've been following this guide: http://artur.ejsmont.org/blog/content/how-to-properly-secure-remote-api-calls-from-php-application ...
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77 views

What's the advantage of TLS-SRP over self-signed certificates?

According to http://security.stackexchange.com/a/2531/5002 TLS-SRP allows one to authenticate a client or server without third-party certificates because it uses a shared secret. If you're going to ...
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2answers
52 views

SSL encryption work only in content?

Can SSL encrypt the relative path I would like to visit in a site? If I would like to make a login system with GET instead of POST, can SSL encrypt the part "?username=user1&password=pass1".
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117 views

A doubt in certificate chain validation and revocation checking

So when i do a tls handshake with the server, it responds with a cert chain which the browser verifies and which ends at a trusted root CA. In this the browser checks if the cert presented by the ...
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1answer
44 views

Is it bad to put a certificate as CA in Firefox?

I know I can add a self-signed certificate from a website to Firefox, but only in the CA list of it. Question: does this mean I have to ultimately trust that self-signed certificate? Can someone ...
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617 views

IE11 on windows 8.1 and ssl fallback

I'm having problems with SSL certs and my SSL accelerator. I have a Sonicwall SSL-R and it only supports SSLv2, SSLv3, and TLS1.0. I have it configured to decode SSL with SSLv3 as the TLS1.0 ...
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130 views

Client authentication flaw in old Netscape SSL protocol

Below is a screenshot from the paper "Prudent Engineering Practice for Cryptographic Protocols" by Martin Abadi and Roger Needham. I can't see what's wrong with the protocol and what the fix achieves. ...
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1k views

I don't use TLS extensions, I'm safe of HeartBleed? [closed]

I know that the vulnerability exploits the Heartbeat response which is a TLS feature. Now, when testing some of my important sites, there was some wording that scared me, namely: TLS extension 15 ...
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289 views

DNS causing SSL errors

On my old ISP's DNS servers, sometimes https://www.facebook.com would return a cert for Akamai instead of Facebook. What I don't understand is that changing my DNS server to Googles (8.8.8.8) fixes ...
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67 views

Proving SSL need

I need to prove the need we have to install SSL certificates in our webservers. For that I've been requested to try obtaining sample credentials (in lab enviroment) during a http authentication ...
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2answers
751 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 ...
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98 views

Would disabling resumption/renegotiation mitigate the triple handshake issue?

The Triple Handshake Issue was disclosed lately. As far as I understand it, it highly depends on renegotiation and resumption. So the simple question is: Would disabling resumption and/or ...
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1answer
119 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 ...
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1answer
174 views

Legitimate use case of man-in-the-middle attack for DPI?

I am working on a device that should sit between the end-user and the server, and that will do deep packet inspection. It is basically a parental control node. This device will be sold to the user, so ...
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71 views

Specify multiple ips in a certificate

I created an x509 certificate using gnu certtool, in the certificate template i specified cn=myip Problem is that each time I change my network I need to remake the certificate because my ip ...
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1answer
72 views

Can I reliably identify Apple devices that have not patched against the gotofail vulnerability based on user agent string?

The title pretty much says it. Do the security patches to address the gotofail security issue in multiple Apple products employing SSL change the User Agent string for the respective systems? And, of ...
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1answer
167 views

why credentials are not shown in mitmproxy?

my question is that why I can not see some credentials in mitmproxy while the application connecting to, uses ssl connection? I actually installed the mitmproxy server on my PC and have set up my ...
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1answer
124 views

Use TLS certificate as both server and client?

For a federated server-to-server protocol with domain-based identities, I am thinking of using TLS client certificates as authentication mechanism. I figured that re-using each peer's TLS server ...
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1answer
101 views

HTTP security headers on non HTML (images, JavaScript, etc)

Let's say, the HTTP security headers below are applied to all HTML pages of a site: HTTP Strict Transport Security (HSTS) X-Frame-Options (XFO) X-XSS-Protection X-Content-Type-Options Is it OK to ...
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3answers
171 views

Using public/private key without signed certificate

I am working on a java program and I am now working on its network security. I want to use a secure connection since it transfers a lot of sensitive information. On all security guides it is mentioned ...
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1answer
97 views

Is it dangerous to sync my data with my personal server through unencrypted http?

Since Apple force iPhone users to use iCloud to sync contacts & calendar, I moved to a local ownCloud instance that works well. However, it would be more convenient if I could sync everywhere and ...
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207 views

Why are OSX users of my TLS-only site being asked to supply a client certificate?

I purchased a Comodo SSL certificate (OV), and set up the Apache vhost config so that all traffic is forwarded to 443. Intermittently some users are being prompted to supply a client certificate; ...
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3answers
1k views

Can we control the SSL version for ClientHello

Can we control the SSL version for ClientHello (like passing the lesser version then maximum supported)? I am using Java client to connect to App server. Currently my client is supporting TLSv1.0 and ...
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1answer
324 views

Does Skype Trump SSLStrip?

I am using SSLStrip against my own computer, but am not being redirected to HTTP. Skype automatically starts up and logs in at my computer's startup, so I was wondering whether the fact that port 80 ...
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62 views

Transport Layer Security for multiple persons

I know that TLS protocol is used to authenticate two persons and when a secure channel is established we can perform a key exchange. My question is if TLS can be used to establish a secure channel ...
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552 views

TLS 1.2 Server certificate and signature_algorithms

In the specification for TLS 1.2, it says the following: If the client provided a "signature_algorithms" extension, then all certificates provided by the server MUST be signed by a hash/signature ...
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212 views

Long-lived SSL connections to dynamic IP addresses

I'm seeing some odd behaviour on my proxy server logs since I started blocking direct outbound connections to port 443 (thus forcing applications to use the proxy server for HTTPS connections). I'm ...
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1answer
51 views

How to properly implement TLS on an ejabbered server

The official ejabbered documentation instructs the user to generate a self-signed certificate like this: openssl req -new -x509 -newkey rsa:1024 -days 3650 -keyout privkey.pem -out server.pem openssl ...
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236 views

Export ciphers prevalance

I would like to clarify the consequences of not supporting export ciphers. When I run a qualys ssl test on ebay.com, I notice that the following cipher suites are supported. ...
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97 views

Certificate Mapping in IIS

When pasting the certificate blob in the configuration editor in IIS 7.5 for one on one authentication, is this the server certificate or the client certificate?