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

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-3
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1answer
185 views

Different AES 256 algorithms produce different results?

I've tried 3 AES 256-bit CBC encryption programs, and I seem to be getting different results for each one with the same 32-character password, which consists of all @ signs. They are: Polaris SSL ...
1
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0answers
317 views

Does ZRTP provide useful protection, given that the SAS is not verified?

Firstly, some important backstory. I'm producing a corporate version of an IM/VOIP/Screensharing client using the Open Source Jitsi. We are going to be using a central server and have already ...
10
votes
4answers
698 views

What was SSL 1.0?

What was SSL 1.0? SSL 2.0 and 3.0 are well-known and well-documented. But what did the SSL 1.0 protocol look like? Wikipedia says there was a SSL 1.0 but doesn't say anything about how it worked. ...
3
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2answers
548 views

Why does Google SSL cert change so frequently?

For the last few months I have been using the Firefox addon Certificate Patrol to watch for changes to sites' SSL certs - so as to know if I am being MTIMed, against which SSL otherwise provides no ...
3
votes
2answers
425 views

Is HTTPS still secured with a known server certificate (private key)?

I see that some product are shipped with a default server certificate. I guess that a lot of these installed products still use the default server certificate in a real environment. If your server ...
1
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3answers
207 views

How do I mitigate a MITM on https?

I am trying to view a https site (which worked perfectly fine till yesterday) and Chrome is showing me that the site's security certificate is not trusted. I am on a home network. How can I know if ...
1
vote
1answer
159 views

xmpp ssl cipher negotiation

Does anyone know how ssl ciphers are nogitiated via the xmpp protocol. When I capture packets, I see: <starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/> There is no hello server/client or ...
1
vote
1answer
221 views

Reason for using Asymmetric encryption along with SHA256

I got a document with integration with another application. They mentioned I need to hash and then encrypt data with my private key before sending it over HTTPS. By doing this, they are making sure ...
0
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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 ...
0
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2answers
121 views

How is the key obtained when I login via VPN?

So, I configure my VPN (let say which uses PPTP protocol), enter the server name, username and password. Then, I visit a website. Before that, my request is encrypted using AES with some key. That ...
0
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1answer
143 views

Average user reaction to SSL certificate error pages [closed]

With the attack on Twitter's whois information today, I got into a bit of an argument about whether or not the SSL certificate error messages that web browsers have will actually do any good to ...
1
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2answers
2k views

Man in the middle attack still possible against ssl?

I've heard about ssl strip in the past that allowed for man in the middle attacks to take place against browsers, but those vulnerabilities were patched long time ago. So my question is...are there ...
7
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3answers
305 views

Why is RFC4255 (SSHFP) not used for https?

I had this idea a few hours ago, but of course it already exists and there is even an RFC... Why don't we publish the fingerprint for the SSL/TLS certificate via DNS? We need DNSSEC to make sure the ...
2
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2answers
823 views

Please help verify my understanding of Domain Validation (DV) SSL Certificate

This is what I understand so far from reading various knowledgebase and article about DV SSL. Can anyone please help clarify if any of these is wrong? DV SSL (and SSL certificate in general) is only ...
1
vote
2answers
107 views

Using HTTPS GET from app to server

When developing Webpages, they say you should use POST for "destructive" actions, and GET for actions that only retrieve information. Is the same true for apps? Is it a total no-no to use GET for ...
2
votes
3answers
4k views

Diffie-Hellman and its TLS/SSL usage

I'm struggling to understand the (non-)use of Diffie-Hellman (DH) in TLS. DH has been around for a long time now, why does almost nobody use it, yet? DH is only being used for "key sharing", why ...
0
votes
1answer
135 views

Does the VPN provider will have access to my content? [duplicate]

I am planning to buy a VPN service just to circumvent the filtering applied by the government. However as I am planning to use OpenVPN on my dd-wrt router, all of my data will pass through this ...
0
votes
3answers
7k views

How to prevent man-in-the-middle attacks beside of SSL?

I would like to discuss this scenario: There is a HTTPS service which responds with signed keys to an authenticated client. These signed keys can be used for another service to return very sensible ...
6
votes
2answers
501 views

ECC based Client Certificate import in Chrome/Mozilla in windows

I have deployed a PKI server and successfully able to generate the ECC based user or client certificates. but non of the web browser support ECC as public key. I have tried different tools and also ...
6
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1answer
523 views

Is Postgres password-based authentication secure?

According to Postgres's documentation, Postgres's password authentication method uses MD5 hashing to secure the password: The password-based authentication methods are md5 and password. These ...
3
votes
3answers
6k views

Is it possible to use wildcard certificates on multiple devices?

I have a server that I want to use a wildcard cert on. It runs multiple services. I purchase a wildcard cert so that I can protect mail.something.dom, www.something.dom, im.something.dom, ...
0
votes
3answers
4k views

How to sniff traffic on my wireless network?

For educational purposes, I want to see what packages are sent over my home wifi with VPN on and off. What program should I use for this?
1
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5answers
2k views

How can I know that the CA certificates in my computer have not been spoofed?

As far as I know, the browser contains the certificates of several CA. When I access http://gmail.com, the site says it is Gmail, it exposes a certificate signed by one of the CA I have in my ...
3
votes
4answers
715 views

What are the risks associated with SSL interception in an Organization?

If an SSL interceptor is installed for security reasons in an Organization, and a certificate from intermediate CA is installed on all domain machines, what kind of risks this setup presents?
1
vote
5answers
318 views

Manual DNS change

If I manually change my DNS setting in the router or in Windows settings from the provider's one to, say, 8.8.4.4 by Google - will it mean that my ISP has no idea which sites I am going to? Maybe it ...
2
votes
1answer
198 views

Chrome torn down the TLS connection after received server ChangeCipherSpec

I met a strange issue that the TLS connection is always torn down by Chrome after received server ChangeCipherSpec. The sequence is as following: Client Server SYN--> ...
1
vote
1answer
475 views

Is the connection between Gmail server and Apple server encrypted? [duplicate]

When I send an email from my gmail account to another mail server (apple, microsoft, yahoo...), is the connection encrypted in the path between the two servers?
4
votes
2answers
151 views

Application level security…won't I end up just duplicating TLS?

I'm creating a communications protocol for a custom device, and originally I planned to simply use Transport Level Security (TLS) as the means of security/encryption. I've been instructed (this is for ...
0
votes
2answers
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 ...
2
votes
2answers
319 views

Wildcard SSL Certificates & SAAS

From what I have read, using a wildcard SSL/TLS certificate is not advisable, how do you do certifcate issuing & management in your SAAS application(linux) where each client has a user selected ...
0
votes
1answer
184 views

Are there any risk in serving static assets via compressed SSL protocol from 3rd party domain?

e.g. curl -v -H 'Accept-Encoding: gzip' 'https://cdnjs.cloudflare.com/ajax/libs/Colors.js/1.2.2/colors.min.js' As you can see, result is gzipped. My assumption is since they are serving from 3rd ...
2
votes
4answers
184 views

New gTLDs are coming. How will browsers handle cookies, SOP and certificates?

Given that the security "zone" varies based on the TLD, how will the new TLS be handled? For example: A browser may permit cookies to be shared and SSL certificates, and wildcard certificates ...
-1
votes
1answer
2k views

Why IE/Windows forces you to install self-signed certificates as root CA to make them work?

In old versions of IE/Windows you could install a self-signed certificate for a web site and it just worked: the warnings disappeared. In more recent versions (and with Chrome) this just didn't work. ...
5
votes
2answers
8k views

Is there an SSL Certificate state-cache on Windows, IE, and Outlook and how it it managed?

Today I changed the SSL certificate that 3,000+ Outlook clients are using. In doing this I changed the certificate to an "older" one that had the same subject name, expiration and everything else. ...
2
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4answers
10k views

SSL Client Certificate authentication

Is it possible to make a program which uses client certificate authentication with only public and private key (I have not generated any certificate, I have only public and private key). Simply, I ...
8
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1answer
2k views

How to audit web servers for resistance/vulnerability to BREACH

BREACH, a new attack on SSL that targets HTTP compression, has recently been publicly announced. I manage a few web servers. How can I audit them to check which of them are potentially vulnerable to ...
3
votes
1answer
354 views

Can Exchange/OWA still compress static images and be immune to HTTP compression attacks?

Microsoft Exchange / OWA (Outlook Web Access) allows for three different types of compression (link for Ex2010) Compression setting Description High Compresses both static and ...
25
votes
4answers
6k views

BREACH - a new attack against HTTP. What can be done?

Following on from CRIME, now we have BREACH to be presented at Black Hat in Las Vegas Thursday (today). From the linked article, it suggests that this attack against compression will not be as simple ...
4
votes
1answer
861 views

Whats the best custom compression method to use when I have SSL?

Suppose I have an application which does encryption using SSL and provided you cannot control what cipher suite is being negotiated, and assuming that I have some custom compression over the data ...
1
vote
1answer
98 views

Impact of using map APIs without SSL support? [duplicate]

We are currently developing a web application which involves map APIs. Most of the map API providers don't provide any SSL support (e.g. Yahoo! doesn't). What will be the security impact of using map ...
-3
votes
2answers
160 views

NSA and facebook chats [duplicate]

Can you guess how the NSA can read Facebook chats, while Facebook does use SSL encryption? Requesting information directly from the Facebook HQ is possible (see also who betrayed Facebook in favor of ...
1
vote
1answer
897 views

Backing up SSL certificate private key files

What are some recommended practices for backing up SSL certificate private key files? I'm working in an environment where the public web servers are not backed up, because in theory the public ...
1
vote
1answer
460 views

Transparently authenticating users or devices on mobile devices

I have an interest in using EAP-TLS to authenticate both users and devices separately on mobile devices (phones, iPods, tablets, etc.). My issue is how to delineate between user authentication and ...
2
votes
1answer
396 views

Does the NSA X-Keyscore apply for HTTPS traffic? [closed]

See X-Keyscore: NSA tool collects "nearly everything a user does on the internet". http://www.theguardian.com/world/2013/jul/31/nsa-top-secret-program-online-data Does anyone have a clue how they ...
4
votes
1answer
5k views

Getting “SSL: alert [”write“]: fatal : bad record mac” during openssl Handshake

I am getting SSL: alert ["write"]: fatal : bad record mac from the OPENSSL logs during the handshake and Client is not sending the Application data and its creating the handshake again and again. ...
0
votes
1answer
235 views

How to get an exhaustive list of ciphers for TLS 1.0, TLS 1.1 and TLS 1.2

After TLS 1.0, there have been a number of RFCs e.g RFC 5932, RFC 6430 etc. Is there any place where one can get an exhaustive list of ciphers for each of the versions. Or at least an exhaustive list ...
0
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2answers
2k views

Public keys on OpenSSL vs PGP?

It is my understanding that PGP permits multiple public keys, and in SSL you can only extract one public key? Is this correct? Is there any brief high level run down between the two. I don't feel as ...
3
votes
2answers
530 views

A protocol to authenticate users without login/password

A casual message exchange on reddit yesterday got me thinking whether it might be possible to design a protocol that removes the need for users to remember a unique password for every service (s)he ...
7
votes
1answer
711 views

What's the hash for in ECDHE-RSA-AES-GCM-SHA?

Presumably the SHA is for deriving the AES key from the shared secret. Where else is the hash used? ECDH just does ECC (no hashing). RSA does masking and padding but this doesn't involve the ...
5
votes
2answers
662 views

Root SSL certificates and browser support

I have given three certs to be install on nginx AddTrustExternalCARoot.crt PositiveSSLCA2.crt www_example_com.crt So I concat them into a chained cert cat www_example_com.crt PositiveSSLCA2.crt ...