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

learn more… | top users | synonyms (2)

3
votes
1answer
96 views

What stops an attacker from tampering with data sent during the SSL/TLS handshake?

On this page, it says the first thing sent is the SSL settings, such as version, and cipher settings. If the attacker, say, wanted to change the encryption method used, what makes this not possible?
1
vote
1answer
102 views

How important is a dedicated SSL certificate vs. shared for eCommerce?

At my work, we've been using Network Solution eCommerce for many years now, and they have been working very well for us. However, as the years go on, their services become more and more outdated. As a ...
0
votes
1answer
49 views

Diffie-Hellman certificate verify message

On the RFC 6101, about "Certificate Verify", I read that: "This message is used to provide explicit verification of a client certificate. This message is only sent following any client ...
2
votes
3answers
64 views

Are Extended Validation certificates any more secure than regular ones?

Or are they just an attempt to get you to pay more money to a CA because it tells your browser to show the address bar in green with your organization's name? Also, what are the technical details ...
3
votes
3answers
139 views

When downloading from an https web page - will the download also use ssl?

If I click on a download link on a page that uses ssl, will the download also use ssl? If the answer is not (or: sometimes yes, sometimes not) - is there any way I can force it to be protected? I'm ...
0
votes
1answer
40 views

Is it possible to create a SMIME only PKI that *can't* be used for SSL?

Assume I have a Root CA that I want to share with hostile untrusted 3rd parties. Then constrain this root using specific EKUs at the root. OID=1.3.6.1.5.5.7.3.4 ; Secure Email Next, ...
12
votes
2answers
1k views

Why use 256-bit symmetric encryption in TLS when 2048-bit RSA doesn't even offer 128-bit strength?

I've noticed that websites start to use 256-bit symmetric encryption, but often still end up using 2048-bit RSA keys. http://www.keylength.com/en/3/ The link above displays the ECRYPT II ...
1
vote
1answer
77 views

How does Java connect via SSL to a server without me providing any private/public key for the communication? [duplicate]

I am talking about server side auth only. Does Java create an internal self-signed cert for this communication? AFAIK from TLS protocol, we both need to create a shared secret, which is based on what ...
1
vote
2answers
46 views

SSL Server Certificate optional

In RFC 6101 (Of SSLv3), In page 22 ServerHello Certificate is marked with * which means optional or situation-dependent messages that are not always sent. It means that Certificate is optional in ...
0
votes
1answer
276 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 ...
2
votes
1answer
301 views

Can HSTS be defeated?

As I know HSTS is mainly implemented to mitigate famous sslstrip attack in which browser is forced to use ssl when connecting to particular site. And I think it also prevents user to proceed to site ...
1
vote
2answers
55 views

HTTP Header disabling non-SSL (or TLS) content on this page

Is there an HTTP Response header that disallows any non-SSL content from being displayed on the current page? The idea is some times external content that needs to be on the website (cough, ad ...
0
votes
1answer
143 views

How is the new “Dyer” malware bypassing SSL?

Apparently the new Dyer malware is bypassing SSL to swipe bank credentials. I read that it's using "process hooks" to hook the browsers and see the data BEFORE it is encrypted and sent to the bank ...
3
votes
2answers
137 views

Phone Applications having SSL/TLS enabled behind the scenes?

Please Note: This question is slightly based on me being a tin foiled hat with the issues that has arisen from the leaks, documents, and questioning trust thanks to Edward Snowden. Thanks to adding ...
1
vote
1answer
47 views

Protecting encryption of outdated software with a server

I have a 1st generation iPad, and I usually use it for web browsing when I'm home. The 1st gen iPad can't run newer versions of iOS (I'm stuck with iOS 5). I went to a website that tells if your SSL ...
30
votes
5answers
4k views

Is there any way for my ISP or LAN admin to learn my gmail address as a result of me logging into gmail's web interface through via their network?

The title says it all, really. I'm Alice, and I want to login to Gmail's web interface through my browser. Ike, the internet service provider, and Adam, the local network administrator, would like to ...
2
votes
2answers
171 views

How does the SSL connection protocol work with self-signed certificate?

I'm using the self-signed certificate, but I don't know how this protocol works. I connect two apps with a socket SSL and it works fine. The server is a Python app and the client is an Android app. I ...
0
votes
0answers
165 views

Socket.IO & WebSocket security - query certifcate/public key a leak?

Socket.IO and WebSocket do not provide underlying connection information (like the certificate or public key of the SSL/TLS channel), and I'm trying to understand the reasoning. The context for this ...
1
vote
2answers
67 views

Security risk of Microsoft AD Certificate Services?

We have an internal CA server for our domain located at http://cert_srvr.local.domain/certsrv/certrqxt.asp. This server runs Microsoft Active Directory Certificate Services. When I went to the ...
1
vote
3answers
126 views

Is it secure to be using LDAP, or is LDAPS the only secure option?

I am currently using an LDAP setup. I am wondering if it is secure from Man-in-the-middle attacks or other vulnerabilities?
1
vote
1answer
163 views

Mixing green (EV) ssl certificate with non EV certificate

We have a green (EV) SSL certificate for our site and images are fetched from the same domain (https). Currently we are planning to change the images domain (for performance issues) and put them in a ...
0
votes
1answer
68 views

Server SSLv2 enabled on non-webservers

Using Nessus I'm scanning our internal network for vulnerabilities and exploits. I've found a large number of instances where SSLv2 is enabled and is as a result, being flagged as a vulnerability. I ...
0
votes
1answer
93 views

Why middleman cannot capture the encryption key of https/tor traffic? [duplicate]

When we use Tor or https traffic , the encryption- decryption key has to be exchanged between the browser and the website server. Why somebody who can capture entire traffic , say ISP or somebody who ...
0
votes
0answers
24 views

How digital certificate works? [duplicate]

I am trying to understand the digital certificate concept , but I am confused , Below goes my understanding & question, We are using Digital certificate because if Bob & Alice share their ...
0
votes
1answer
144 views

Security risk among shared wifi users [duplicate]

I understand that the shared users on a wifi can see each other's HTTP traffic using proper tools. Is it possible for shared users to read HTTPS traffic or encrypted traffic like TOR ?
0
votes
2answers
113 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 ...
32
votes
5answers
4k views

HTTPS still NSA-safe? [closed]

There are exerpts, that say that using https can be broken by the NSA by now. So is https still a solution for secure web-browsing? source: ...
1
vote
1answer
80 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 ...
0
votes
1answer
91 views

Why has Convergence stalled out? [closed]

Convergence is a well-thought out system to replace certificate authorities built by Marlin Moxiespike back in 2011. Since it's debut, it seems to have largely stalled out, with no additional major ...
1
vote
1answer
295 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 ...
2
votes
1answer
523 views

SSL certificate chain verification

After reading many articles and watching many tutorials I decided to be specific because there are some things about SSL certificate chain verification and SSL cetificate verification in general that ...
0
votes
1answer
78 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 ...
3
votes
1answer
166 views

What is “Multi-Protocol Unified Hello” and what are the impacts of disabling/enabling it?

This article describes how to disable old versions of TLS, but in addition to doing so, "Multi-Protocol Unified Hello" is also disabled. # Disable Multi-Protocol Unified Hello md ...
4
votes
2answers
194 views

How widely deployed is TLS with cipher ECDHE?

Microsoft deployed a patch for Windows 2012 R2 and Windows 8.1 that adds the following ciphers. Cipher suite Exchange Encryption Hash TLS_DHE_RSA_WITH_AES_256_GCM_SHA384 DH ...
0
votes
1answer
114 views

SSL decryption without installing a certificate on each client

Given a proxy performing MITM SSL decryption and inspection, is it possible to install a wildcard certificate (*.domain.com) on the proxy signed by a root CA (such as VeriSign or GoDaddy) such that ...
2
votes
2answers
1k views

Does CVE-2014-0195 affect HTTPS?

Does CVE-2014-0195 (openSSL) affect HTTPS or only VPN tunnels? Reference: https://security-tracker.debian.org/tracker/DSA-2950-1, https://isc.sans.edu/
2
votes
1answer
117 views

Why does facebook php sdk (and multiple others clients) include CA bundle with a lot of CAs?

This is what facebook ships with their API php client: https://github.com/facebook/facebook-php-sdk-v4/blob/master/src/Facebook/fb_ca_chain_bundle.crt It contains dozens (hundreds?) Root CAs. But ...
2
votes
2answers
135 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 ...
1
vote
1answer
160 views

When SSL detect a replay attack?

Suppose an attacker records all messages of a SSL handshake (RSA one-way), and starts a replay attack. When (after which message) can the server possibly detect the attack? Now suppose the attacker ...
1
vote
0answers
487 views

GnuTLS ServerHello exploit (CVE-2014-3466) - how to verify?

So pretty much all of the GNUTLS world is worrying about CVE-2014-3466. I checked my Kali and it responds with this - # apt-cache rdepends libgnutls26 | grep -v lib Reverse Depends: ...
5
votes
3answers
434 views

What exactly determines what version of SSL/TLS is used when accessing a site?

If I click on the little lock icon in Chrome it says that the site in question is using TLS v1. I also checked using openssl and was able to hit the site using TLS1, SSL2 and SSL3. From what I ...
5
votes
2answers
669 views

GET over HTTPS vs POST over HTTPS [duplicate]

How safe is a hybrid mobile application developed using a GET Web service over HTTPS? What are the pros and cons of using it and how safe is POST over HTTPS?
1
vote
1answer
123 views

nonce in SSL/TLS handshake

In SSH/TLS handshake, a nonce is always sent by the client to server and vice versa. Nonce basically consists a random number and unix timestamp. What is the need of unix timestamp ? As the nonce is ...
0
votes
2answers
123 views

SSL Finished message contents

Hi everyone I'm little bit confused about contents of Finished Message used during Handshake Protocol.In particular this message (client/side) contains the connection-id originally sent from the ...
1
vote
1answer
177 views

Why do you need a 4096-bit DSA Key when AES is only 256-bits?

This is something which I have been wondering and trying to find an answer for, but yet to come even remotely to one. Why do you need a 4096-bit DSA/El-Gamal key when AES uses only 256-bit keys?
0
votes
2answers
1k views

Which browsers are using openssl

It is asked in stackoverflow, but I suppose maybe it is more suitable to ask here. It is said that openssl are widely used, however, as far as I know, the most popular browsers seem not use openssl, ...
4
votes
1answer
124 views

Tor and (SSL) response

I have two questions regarding Tor (onion routing). How do I receive responds from a server when I use onion routing, I've read that, the last node(exit node) will use the same path I used but in the ...
3
votes
4answers
249 views

What's the need of multiple implementations of SSL/TLS? [closed]

I've been reading about SSL/TLS and I was surprised when I saw the amount SSL/TLS implementations that exist. wikipedia. So, is there really a need for all these different implementations? Wouldn't ...
3
votes
2answers
260 views

Implementing Own TLS mechanism

I wish to implement SSL/TLS for my site. How can I do this on my own without using a certificate authority. The site will be accessed only via certain machines so I can easily install the public ...
1
vote
1answer
94 views

What can entreprise admins do with our secured sessions?

The enterprise where I work has a proxy server that traces and filters our web activities. Employees claim that they can know the links that we visited and see the content of HTTP web sites, but they ...