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

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3
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1answer
322 views

Security for a low latency online multiplayer game

I am designing an online multiplayer game and I am looking for a good tradeoff of secure communications with minimal CPU and bandwidth utilization. My ideal solution would only use UDP packets since ...
4
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3answers
1k views

How to roll my own security mechanism - avoid SSL

i'm looking at implementing my own security mechanism rather than using ssl due to ssl being 'hopelessly broken' http://www.theregister.co.uk/2011/04/11/state_of_ssl_analysis/ and also because it is ...
5
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2answers
319 views

System for Mutual authenticaion and confidentiality

I am looking for a protocol where there needs to be mutual authentication between client and server. For example server should connect to a particular client only. That is client should authenticate ...
2
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3answers
1k views

HTTPS Apache2 Information Leakage

Hello IT Security! I have Apache2 vhost with HTTPS listening on port 443, ie. https:// securesecret.com. I have another vhosts with HTTP listening on port 80, ie. http:// one.com, http:// two.com. ...
2
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2answers
1k views

Secure SSL Session from losing itself into unsecure http

I've seen some implementations of HTTPS SSL and, as a visitor, forced to rely to a lot of those. What would a secure implementation look like and where can one expect problems? I expect the installer ...
30
votes
6answers
13k views

Trying to make a Django-based site use HTTPS-only, not sure if it's secure?

The EFF recommends using HTTPS everywhere on your site, and I'm sure this site would agree. When I asked a question about using Django to implement HTTPS on my login page, that was certainly the ...
4
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1answer
4k views

openssl verify signature

For S/MIME, I now know I can verify PKCS#7 detached signatures with: openssl smime -verify -in detachedsign.pem -content content.txt But what about non-MIME messages? So if I sign the message ...
1
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1answer
361 views

How to perform eavesdropping [closed]

How eavesdropping is performed? Can I perform eavesdropping by sitting on client side? Can eavesdropping be done in both wired and wireless transmission too?
5
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9answers
3k views

What is the best way of securing a website logon without SSL or preshared keys?

Today I sniffed some unencrypted wlan traffic during class and I found quite a few passwords by a simple search for "pass" and "user" in wireshark. Turns out about half the sites we use for school ...
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5answers
7k views

Benefits of identifying clients based upon the “X-Forwarded-For” or similar HTTP header in addition to Client IP

The X-Forwarded-For header is used by some HTTP proxies to identify the IP address of the client. The wiki page (linked above) mentions that ISPs may use this header as well. In addition there are a ...
1
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3answers
4k views

Facebook login on HTTP? [duplicate]

Possible Duplicate: Is the Facebook login form using SSL without https in the URL? If you access http://www.facebook.com/, in the top right side there is the login section. You can enter ...
14
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6answers
7k views

How do I check if a gmail/gtalk SSL certificate is valid?

Pidgin started prompting me to accept/reject new gtalk SSL certificate a few days ago and I am not able at the moment to tunnel the traffic to check if it would continue to happen or if it wouldn't ...
8
votes
2answers
318 views

Why is there no Domain CA?

I was asked to deliver a signed SSL certificate for an IIS server for a client. I have previously done this for the same client/domain before, so it start to seem like an unnecessary expense to hold ...
19
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4answers
5k views

https security - should password be hashed server-side or client-side?

I am building a web application which requires users to login. All communication goes through https. I am using bcrypt to hash passwords. I am facing a dilemma - I used to think it is safer to make a ...
2
votes
7answers
624 views

How can http data be compromised on a secure network?

I understand that it is bad to send passwords in plain text over the wire because somebody can look at it and clearly steal your information, and that the solution is to use HTTPS because the ...
21
votes
3answers
7k views

Which SSL/TLS ciphers can be considered secure?

The OpenSSL website provides a long list of different ciphers available for SSL and TLS. My question is, which of those ciphers can be considered secure nowadays. I am especially interested in HTTPS, ...
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vote
2answers
500 views

Are there any strange things with google.com over HTTPS?

So I'm always browsing the web through Privoxy using minimum these rules: vi /etc/privoxy/user.action { +redirect{s@http://@https://@} } .chrome.google.com .code.google.com .docs.google.com ...
3
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1answer
3k views

SSL certificate fails to adhere to basic constraints and PCI compliance

We have an SSL cert from GoDaddy and tried to run a PCI compliance check using McAfee's scan. The one problem they found was that the basic constraints / path length is not configured. Here's what ...
7
votes
1answer
512 views

Inconsistencies found in OpenID Provider's HTTP Headers. Which one is the most secure that I should imitate in my STS, and Relying Party?

I'm comparing the HTTP headers of the various providers (LiveID, Google, Yahoo, etc) and notice a broad inconsistency in implementation on the sign in page, sign out page, and subsequent pages. ...
8
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2answers
1k views

How to defend against SSL-Exhaustion attacks?

The problem of SSL-Exhaustion attacks is well known for years, but nobody really cared until THC released their exploit-tool recently. THC talks about counter measurements in their release: No real ...
15
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3answers
20k views

Expired SSL Certificate Implications

What are the security implications of an expired SSL certificate? For example if an SSL certificate from a trusted CA has expired will the communication channel continue to remain secure?
5
votes
1answer
219 views

What is the status of forced HTTPS everywhere (Strict transport security) via DNS? I only see last years draft

I'm trying to find the most recent RFC on HSTS in DNS (or rather said DNSSEC), but can only find this year old one in expired draft status Where can I find the most current guidance on STS in DNS? If ...
4
votes
3answers
269 views

Are SSL certificates from a CA necessary for secure communication?

Am I right in thinking that SSL certificates from a CA are purely for identification purposes and serve no purpose in the actual encryption of data? In other words if I were to create a self signed ...
18
votes
1answer
12k views

What key exchange mechanism should be used in TLS?

There are many key exchange mechanisms that can be used in TLS. Among them are RSA, ECDH_ECDSA, ECDHE_ECDSA, ECDH_RSA, ECDHE_RSA and others. Which of these are more cryptographically secure and can be ...
12
votes
3answers
622 views

Can I expect my e-mail to be routed securely?

If I connect to my e-mail server via SSL (SMTP/SSL) and the recipient also only checks his e-mail via SSL (web/https or IMAP/SSL), does this - generally speaking - increase the security for the ...
15
votes
3answers
5k views

What vulnerabilities could be caused by a wildcard SSL cert?

In a comment on this answer, AviD says: "There are numerous security issues with wildcard SSL certs." So, what are the problems? I understand that the same private key is being used in multiple ...
6
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3answers
1k views

How and when should I use OpenSSL for IT Security? How do I understand the output?

I'm discovering OpenSSL, and already used it to diagnose a faulty SMTP TLS connection, but I'd like to get a better / full understanding of the tool and how to use it. What resources should I use ...
25
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3answers
2k views

Why was the BEAST attack previously considered implausible?

Can someone explain why the BEAST attack wasn't considered plausible? I saw an article quoting the creator as saying 'It is worth noting that the vulnerability that BEAST exploits has been presented ...
25
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4answers
18k views

Does https prevent man in the middle attacks by proxy server?

There is a desktop client A connecting to website W in a https connection A --> W Somehow between A and W, there is a proxy G. A --> G --> W In this case, will G be able to get the ...
16
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3answers
7k views

What are the risks of self signing a certificate for SSL

Let's say I sign a SSL certificate for myself, and I'm not using a certified CA. What are the risks and/or threats of doing it?
2
votes
2answers
562 views

Using AES with a hex key/iv, what mode of operation is the “most secure”

I realize that is a loaded question, but it is not an unreasonable one. given a hex key/iv, what mode of operation is most secure from offline attacks. I defaulted to aes-128-cbc. Partly because of ...
7
votes
2answers
468 views

Good resources for learning cryptography and OpenSSL?

I'm a programmer and I'm working on a Single Sign-on project using SAML. I want to do all I can to make this as secure as possible. Since making a secure Single Sign-on/SAML solution requires signing ...
14
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3answers
5k views

Is the Facebook login form using SSL without https in the URL?

If I go to http://facebook.com, I am not redirected to https://www.facebook.com. If it doesn't have https in the URL, can the login be secure? Usually I am redirected to an https page on other sites? ...
4
votes
2answers
4k views

Is it possible to decrypt a SSL/TLS session without doing a MITM-attack?

I'm not talking about decrypting the connection while the SSL/TLS is happening (MITM) but after the connection is closed and I have a pcap file of the entire negotiation/data transfer process. How ...
6
votes
1answer
3k views

How is tunnelling SSH through Poxytunnel/HTTPS different from doing it through SSL with Stunnel?

In an answer to What is the difference between SSL, TLS, and HTTPS, it's said that HTTPS is HTTP over SSL/TLS. That is, an SSL/TLS connection is established first, and then normal HTTP data is ...
19
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3answers
1k views

What are the risks of using a CDN to speed up my website? How do I avoid them?

Content Delivery Networks (CDNs) are well known to speed up the performance of a website, but they create the obvious security risks if someone were to change the code that resides on the CDN. What ...
6
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1answer
2k views

Email SSL security?

I use IMAP and I only access my email through SSL. However, the settings for encrypted email access seem a bit more complicated that https. Can someone explain the security implications of the ...
15
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1answer
3k views

Guidance for implementors of HTTPS-only sites (Server side)

The recent trend in HTTPS attacks is to attack the HTTP protocol. What should I do to increase my site's security if the only protocol I want is HTTPS? Some easy to implement ideas are Implement ...
4
votes
2answers
597 views

How practical is a certificate's “basic constraint” property in protecting my HTTPS / SSL session?

Suppose a leaf node creates a certificate for a different domain, acting as a CA. Do most popular frameworks, or SSL chain validation tools verify the constraints? Are there any I should be ...
2
votes
2answers
103 views

How can I force certain the webclient to honor or remember certain parameters from the webserver?

HTTPS is subject to several MITM attacks, that is clear. However I think it would be helpful to the ITSec crowd if there was a way to force a certain browser behaviour when accessing known-trusted ...
3
votes
1answer
209 views

Can wildcard certificates hide/obscure the hostname in a TLS connection?

I'm trying to increase security for my cloud-based / multi-tenant environment. I'm considering having clients access an obscure URL such as GUID.myCloud.com. I will then respond to that guid-based ...
5
votes
1answer
523 views

Should I include a random padding in every HTTPS request and response?

According to the following paper, it is possible to decrypt HTTPS traffic by inspecting AJAX calls and using the size parameter as a cryptographic oracle. Should I be sending a variable length ...
4
votes
5answers
2k views

Should I ignore the BEAST SSL exploit and continue to prefer AES?

Because of the BEAST exploit it seems everyone is saying you should stop using AES and instead use RC4. I am wondering if it wouldn't be better to continue using AES instead for the following ...
4
votes
1answer
361 views

Any non-commercial certificate authority issuer for web applications?

Is there any non-commercial certificate authority capable of issuing valid certificates for web applications? I mean, the certificate must be accepted by browsers, like those of commercial CAs?
14
votes
6answers
6k views

Does SSL/TLS (https) hide the urls being accessed [duplicate]

Suppose I type this in my browser https://www.mysite.com/getsecret?username=alice&password=mysecret and an attacker is watching all traffic from me to my ISP. What information is protected by ...
13
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2answers
3k views

What should I know before configuring Perfect Forward Secrecy?

PFS has gained attention in our audit department because of its innate ability to limit our exposure if someone steals our private key. What pitfalls or common mistakes should I be aware of before ...
3
votes
2answers
469 views

Inspecting a TLS Certificate to determine RSA Key Usage restrictions

With regard to this answer, I have a question about Key Usage in an SSL certificate. Most SSL server certificates have a RSA key which is not restricted through a Key Usage extension, so you can ...
4
votes
1answer
257 views

How secure is a https website? [duplicate]

Possible Duplicate: Does an established ssl connection mean a line is really secure When I visit a website -- say, https://ebanking.pick-your-bank.com -- my browser (fully patched version ...
0
votes
3answers
145 views

What organisation(s) is able to recommend a baseline technology set for safe, secure, web browsing?

This is a high level question regarding some recent posts about enhancing web browser security from an end-user perspective. What business/organisation(s) would have: Sufficient technical skill ...
5
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2answers
1k views

How eavesdropping will be performed how can I prevent from eavesdropping

I believe that eavesdropping in a man in middle attack and the message is passing from the client to server the man sitting at ISP or network hackers can look at what message I am sending. Heard that ...