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

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22
votes
3answers
7k views

Why is “www.” considered unsafe in this HTTPS URL?

I was doing some cross-origin requests to Soundcloud's oEmbed and I noticed some strange behaviour. When doing a request from my localhost, which is on a regular HTTP connection, everything worked ...
-1
votes
1answer
47 views

An indian government website is not secure [on hold]

We know the news about fake SSL certificates issued by Indian government agency. This site http://www.passport.gov.in/nri/Online.do does gather confidential information as you can see. The site ...
0
votes
2answers
54 views

https login iframe 2014

Per current security recommendations & browser support, is it okay to have an https iframe in an otherwise http-only set of pages? Is this not a dupe? It is, but I want current trends because ...
0
votes
1answer
44 views

Why do certificate authorities often require/use multiple intermediates?

I suppose this is related to What is an intermediate certificate authority? but I think my question is a bit different so I'll ask it anyway. Why do most modern certificate authorities (e.g. ...
1
vote
1answer
186 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 ...
2
votes
1answer
450 views

HTTP Reverse Proxy: Correct way to do SSL to backend

If I have a HTTP reverse proxy that communicates with it's backends in an untrusted datacenter, or across datacenters, I would want to use HTTPS in the backend, as talked about here: Reverse Proxy ...
0
votes
0answers
29 views

securing my API: concept of accesstokens

first of all I want to excuse for the bad spelling and grammar. English is not my mothertongue. I have built a JSON communication between frontend(website) and my NodeJS webserver. I want to keep in ...
1
vote
2answers
221 views

Online Shopping password keylogger risk

Suppose I do an online shopping they are asking me to enter my card details like four digit number(whatever related to that) and they are asking me to enter the PIN number too. If I enter all this ...
358
votes
3answers
143k views

How does SSL/TLS work?

How does SSL work? I just realised we don't actually have a definitive answer here, and it's something worth covering. I'd like to see details in terms of: A high level description of the protocol. ...
2
votes
2answers
110 views

How can I secure my api to avoid copying?

Im building an app which should receive data from my server. The Api should be a PHP based script which provides the data as JSON. However I want to keep the data private and it should only be ...
7
votes
2answers
316 views

How can we revoke all ssl certificates issued for our domain?

After having the hostmaster@domain.com email compromised, we found that someone issued a Domain Validated SSL certificate for our domain. Now we want to have all such certificates revoked. Is there ...
0
votes
1answer
179 views

SSL / TLS Renegotiation Handshakes MiTM Plaintext Data Injection- medium or low risk?

This is a Nessus finding, which is considered medium by default. Basically it may allow for some plaintext injection which may allow for some man in the middling. My question is, has these been ...
8
votes
2answers
594 views

Can custom elliptic curves be used in common TLS implementations?

Recent developments have cast some doubt on the elliptic curves specified by NIST and used in many standards like TLS (for signatures with ECDSA and key agreement with ECDHE). It seems like the ...
0
votes
3answers
2k views

Hardened SSL ciphers for Nginx as AWS/Cloudfront Custom Origin

Based on recommendations, we recently attempted to harden our Nginx SSL configuration against BEAST/CRIME/BREACH attacks with the following stanza: ssl_prefer_server_ciphers on; ssl_ciphers ...
12
votes
4answers
1k views

Downsides to using HTTPS [duplicate]

Recently Google has indicated that a HTTPS certificate will be used as a positive signal in it's search rankings. This has caused some discussion within our company as to if we should apply a HTTPS ...
1
vote
1answer
190 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 ...
0
votes
2answers
65 views

Printer SSL certificates [closed]

Is a printer SSL cert really necessary if you just print? I don't use https for any administration; just http. I got a vulnerability saying that my cert was out of date.
2
votes
2answers
183 views

It is possible to decrypt HTTPS traffic when a man in the middle proxy is already in place?

I have the following question regarding the decryption of SSL traffic. The topology that I have in mind is like this: User-------MitM Proxy--------WebServer In the environment described earlier there ...
24
votes
4answers
13k views

What steps do Gmail, Yahoo! Mail, and Hotmail take to prevent eavesdropping on email?

I would like to ask what happens when an email is sent from gmail, yahoo or hotmail public web email services? I don't understand email protocols in details, but as far as I know email traffic is ...
0
votes
2answers
48 views

ECDSA ciphers and forward secrecy question about key exchange

I have heard that with forward secrecy that the ECDSA ciphers generate different keys for "each session" because they are not dependent on the private key of the server. My question is how is "each ...
1
vote
2answers
72 views

Are input fields that don’t have name=“” sent via the browser [closed]

Are input fields that don’t have name attributes susceptible to MITM attacks (w/o SSL) or any other attack? For example: <form action="" method="post"> <label ...
-5
votes
1answer
85 views

How to decrypt the encrypted data, in SHA256, of mysql database? [closed]

I have some data in column of table of mysql database in the encrypted form applied with SHA-256. How to decrypt that data using Java. I stuck at this since 4 days. Please spend 5 minutes of your ...
0
votes
2answers
76 views

What would cause a server to only send over 1 SSL certificate to a client?

We have a secure server that seems to only be sending over the identity certificate. Running the hostname through Qualys says that only 1 cert was provided. The intermediate had to be downloaded on ...
2
votes
3answers
133 views

Free second-level domain SSL certificate [closed]

With CAcert.org losing trust in browsers and OSs and StartSSL providing only top-level domain certificates, are there any free SSL certificates providers for second-level domains?
5
votes
3answers
337 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 ...
2
votes
1answer
48 views

API request modification

I am building an API that returns data about companies Multiple applications will access the API, some of these applications will have access to one company, some to multiple companies. When a request ...
1
vote
1answer
106 views

Behavior of trusting a self signed SSL certificate

I have just deployed a Turnkey appliance which comes configured with a self signed certificate. This is a server that only I will be using, so I don't want to pay for a certificate. If I add this ...
5
votes
6answers
1k views

Should the bit-strength selection of a child certificate be influenced by the CA or the chain?

All things being equal; suppose I have a CA chain that has 1024 bits of RSA encryption. Does this mean that my selection of a child CA or WebServer certificate gains no benefit from a higher level of ...
1
vote
2answers
32 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 ...
-1
votes
0answers
30 views

Burp clone certificates [closed]

Basically what I need is a HTTPS proxy, that will get the certificate from the target host, and create a new self-signed certificate based on the metadata of the original certificate. Ideally there ...
1
vote
2answers
60 views

Client-server encryption technique explanation (TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, 128 bit keys)

I opened a web page using https. When I looked at the page info provided by my browser (Firefox) I saw following: Connection encrypted: High-grade Encryption ...
1
vote
1answer
256 views

VPN Client - Addtional Security Layer or a Useless Feature

I have a corporate web portal which is used for staff collaboration including a web-based mail interface connected to MySQL Database, corporate calendar, file storage, customer contacts data with ...
3
votes
2answers
504 views

What is the difference between EV-SSL certificates and Normal SSL certificates? [duplicate]

Recently while looking at several banking URLs I can see the domain name with security certificate at address bar and normal locker security certificate at address bar. Have a look at the screenshots: ...
0
votes
1answer
86 views

This certificate has an invalid digital signature

I am trying to learn securing wcf service using ssl. I found this website and I am following the steps. ...
0
votes
0answers
30 views

Current State of BREACH (GZIP SSL Attack)?

It has been one year since BREACH made our way into our hearts, and there does not seem to be any articles or posts or patches since then, is my Google-fu weakening? Has BREACH been mitigated or ...
2
votes
1answer
47 views

Drawbacks to only using TLS 1.2 ciphers in OpenSSL

I understand you would not want to do this as it would limit compatibility for older devices and platforms. However if someone were in an all TLS1.2 environment, say a very well managed internal ...
0
votes
1answer
177 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 ...
1
vote
1answer
297 views

Camellia and ECDHE_ECDSA -ECDSA in TLS1.2

I am setting up a server using nginx. I have it working with a self signed ecc certificate and if I connect it reports ECDHE-ECDSA which is what I wanted. But I was also wondering if I could use ...
0
votes
1answer
66 views

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 ...
1
vote
2answers
73 views

Can you use https only for cookies and not the html?

I have a few questions, all relating to the title. 1) Is it possible to configure a server to receive the cookies using https but then serve all the content with http? 2) Does SE do this / do many ...
0
votes
0answers
39 views

I Need Wireshark Confirmation on Full Implementation of SSL for YouTube

I've just noticed today that YouTube have implemented SSL over the entire service (including video transfer). I've analyzed the partial SSL YouTube had before and it encrypted the video request but ...
4
votes
2answers
202 views

Safety of using web based proxy?

Lets say for example I have to use a public online proxy like https://www.zend2.com to load a PHP webpage controlled by me containing sensitive data over HTTPS. How would I make sure that the proxy ...
0
votes
1answer
25 views

Why can Oauth2 redirect_uri be a non-https URI?

I'm building a small site which I would like to integrate with LinkedIn for authentication. LinkedIn says that redirect_uri's can be either http:// or https:// (not having to pay for a certificate is ...
4
votes
2answers
686 views

What Ubuntu packages are still affected by gnutls bug CVE-2014-0092?

Right now the internet is abuzz with news about a severe breach in GnuTLS. An update to the relevant GnuTLS packages has already been released. But I am worried whether some packages might have had ...
1
vote
2answers
63 views

Does where I put my PKI certificates matter?

I have an intermediate and a root PKI certificate that I see were already imported into a computers (windows server 2003) certificate store. However both the intermediate and root certificates were ...
3
votes
2answers
43 views

Standard practice for distributing server certificate for users

I have a Winforms app that users have to download and install on their machines. It connects to a WCF service(using SSL), hence requires the server certificate to be installed on users' Trusted ...
3
votes
2answers
82 views

What is the point of secure email gateways?

We run Exchange 2010. Our edge servers run "passive opportunistic TLS" for 99% of the domains we communicate with. For a handful of domains, we have forced TLS on both our end and the other domain's ...
2
votes
1answer
105 views

Capturing iTunes traffic with Wireshark - SSL decryption question

I'm fooling around with Wireshark to capture the activation packets for an iPhone and some other stuff, however the traffic is encrypted. There should be a private SSL key somewhere on my computer to ...
2
votes
4answers
132 views

SSL root certificate optional?

I may have been under the wrong impression on how servers should be setup and what certificates actually get sent over during the server hello certificate message. I came across this today from ...
1
vote
0answers
25 views

Key management for hosting applications

We're looking to host a number of client applications in our environment. Some of those will use crypto, e.g. for ssl or database encryption and obviously we'll need to manage keys for that. I am ...