13
votes
3answers
1k views

Trying to understand why signatures in root certs “are not used”?

Taken from here: Don't worry if the root certificate uses SHA1; signatures on roots are not used (and Chrome won't warn about them. Why are the signatures not used? Are not root certificates ...
16
votes
3answers
2k views

Is SHA1 weak for SSL?

I noticed that today after I scanned a site on the Qualys SSL Labs site that SSL ciphersuites which use SHA1 are now highlighted as being "Weak". It seems this has just happened; I scan sites pretty ...
1
vote
0answers
33 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?
2
votes
1answer
67 views

Does mixing different types of encryption make the connection more secure?

Like when I browse a website using SSL from my laptop that is connected to my router using WPA2. My router talks to my ISP using IPSec. Is that more secure or these types of encryption have nothing ...
1
vote
2answers
52 views

If TLS compression is not supported is a site still vulnerable to attacks such as BREACH?

I have read that BREACH was a side channel compression attack against TLS however focuses on HTTP response compression. If a site has disabled support for TLS compression does that still mean it can ...
0
votes
1answer
47 views

Secure communication End-to-end with android and Server

I´m building a enterprise application and I need to create a secure communication between android and a server. What is the most secure way to do End-to-End communication? Should I use HTTPS or VPN? ...
0
votes
1answer
34 views

Forward Secrecy not supported with referenced browsers?

I am running a scan against one of our servers from the Qualys SSL tester site and it says that my server "does not support forward secrecy with the referenced browsers". What exactly does that mean? ...
2
votes
2answers
119 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 ...
0
votes
2answers
60 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 ...
2
votes
1answer
56 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 ...
1
vote
1answer
51 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. ...
1
vote
2answers
136 views

Will an IP packet to the own IP address ever leave the computer? [duplicate]

I am working on a system that consists of several applicaitons communicating with each other. Some of these applications will run on the same server and some will run on a different one. So there is ...
0
votes
2answers
72 views

Encryption mechanism

I want to send data over the Internet securely. For that, I am using an public key of the receiver to encrypt the data. In this case, if an intruder in the network modifies the data, like placing the ...
0
votes
1answer
59 views

How is the Premaster secret used in TLS generated?

I believe that it uses some combination of the random values sent in the hello messages. From RFC 2246: (TLSv1.0) RSA encrypted premaster secret message Meaning of this message: If RSA is ...
4
votes
2answers
220 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
38 views

In TLS1.2 AES-GCM mode, what happened when input is not exactly the multiple of its block size?

I know that AES-GCM mode does not need padding, and its output are exactly the length of input data plus the tagging. But I am a little bit lost, as AES itself is block cipher, it could only operate ...
66
votes
5answers
6k views

How can my employer be a man-in-the-middle when I connect to Gmail? [duplicate]

I'm trying to understand SSL/TLS. What follows are a description of a scenario and a few assumptions which I hope you can confirm or refute. Question How can my employer be a man-in-the-middle when ...
1
vote
0answers
20 views

PBKDF2 hashing over TLS for encrptig password [closed]

i wanna use PBKDF2 hashing over TLS for encrypting password and session and that way stop hackers from breaking into my connection. How to do it in java.
0
votes
0answers
39 views

Key differences between IPSec and HAIPE?

HAIPE is derived off IPSec but can someone draw up the differences between using IPSec with Suite B crypto and HAIPE with Suite B? We can drop Suite A or classified info for this question; staying ...
29
votes
3answers
1k views

Why do WordPress installations retrieve the crypto secrets remotely on installation?

It seems that WordPress retrieves all the crypto constants remotely (via HTTPS): // setup-config.php $secret_keys = wp_remote_get( 'https://api.wordpress.org/secret-key/1.1/salt/' ); Are there ...
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 ...
0
votes
1answer
265 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 ...
3
votes
2answers
136 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 ...
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
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: ...
0
votes
1answer
89 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 ...
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 ...
1
vote
3answers
82 views

OpenSSL encrypting small packets bandwidth overhead

I have an c/c++ program used for encrypting data for communicating between two ends. Encryption is done using OpenSSL (0.9.8d-fips, Sep 2006). Think it'll be worthy to mention that I'm not much ...
0
votes
3answers
242 views

How Safe Are Encrypted Websites Really?

I was at a coffee shop and had to (I mean had to) check something on my bank account and another account. I figured since the two websites I was viewing were encrypted, and because my computer (I'm on ...
0
votes
3answers
139 views

Encryption and Layers understanding

If I'm right the SSL encryption take place in the application layer, but we can also have encryption in the Internet Layer. Why are we using both, and why sites that doesn't have SSL are considered ...
2
votes
2answers
103 views

Encrypt and Authenticate localhost-traffic?

I have some app-components on the same machine but in different languages which need to communicate. I am using socket communication over localhost to do so. The data transferred is confidential. ...
1
vote
4answers
390 views

Advantages of one time pad

I always hear that one time pad'ing something is so great because you won't know if you've successfully decrypted the data. I understand the idea that you can XOR any bits just the same as any other ...
1
vote
0answers
59 views

Ability to decrypt intercepted encrypted SSL traffic when having private key [duplicate]

I was reading some blog posts about the Heartbleed vulnerability (who's not nowadays) and was thinking about the following. Situation A If I would use a regular SSL/TLS connection the handshake will ...
0
votes
1answer
171 views

are there serious weaknesses in this free password management system?

I want to protect my passwords for free and store them on a machine that might get stolen but have the passwords very securely backed-up in the cloud, again for free, and minimize the total lifetime ...
2
votes
1answer
75 views

How does the Perspective addon work?

I've just installed the Perspetive addon in firefox. When I'm vistit, for example google, Perspective says the following message: Warning: Perspectives has NOT seen this certificate consistently. ...
0
votes
2answers
156 views

Are SSL encrypted communications through a company network safe?

If I'm using Skype, Facebook, or another type of communication at my work, can the network administrator see my Skype and Facebook conversations, although its encrypted with SSL? I found this text: ...
43
votes
5answers
3k views

How does a country block its citizens from accessing a site?

Following Turkey's recent social site blocks, I am wondering how can you efficiently accomplish that as a country. Similar for a big company. Blocking IPs → easy to circumvent, (proxys, tunnels, ...
1
vote
3answers
200 views

Protecting form post values when on https

I am dealing with a multi-step form, and I need to pass information from step 1 to step 2, then from step 2 to step 3, and so on. Step 1 contains a membership number and ID number entry, as well as ...
64
votes
12answers
21k views

Is Google overreaching by forcing me to use TLS?

Gmail was recently changed to require HTTPS for everyone, whether they want to use it or not. While I realize that HTTPS is more secure, what if one doesn't care about security for certain accounts? ...
1
vote
2answers
233 views

SSL/TLS : Authentication mechanism

I have these doubts regarding authentication in SSL/TLS : Will there be an authentication involved for all SSL connections ? For eg. when I browse the internet, using the most up-to-date browser, ...
18
votes
5answers
2k views

Why should one not use SSL? [duplicate]

I see a lot of posts all over the web asking whether or not they should be using SSL to secure their website, or if it's really necessary to do so when the content of their site does not contain or ...
41
votes
12answers
6k views

Why should I care if a site uses encryption or not if I'm not exchanging any sensitive data? [duplicate]

Lots of sites these days, that don't deal with sensitive data, enable encryption. I think it's mostly to make (paranoid?) users feel safer. In cases where there is a user's account being logged in, ...
1
vote
1answer
121 views

Using Encrypt-then-MAC in SSL

SSL typically makes use of MAC-then-Encrypt technique instead of Encrypt-then-MAC (which is usually considered ideal for most of the scenarios). I myself don't have a full insight knowledge about the ...
0
votes
1answer
83 views

Are there software solutions take encrypted credit card data taken straight off a square credit card reader and insert them into a standard web form? [closed]

Does anyone know how you can take the encrypted output of a square card reader and insert it directly into a standard web form?
1
vote
0answers
230 views

Designing a security and encryption strategy for MongoHQ

I'm trying to design the best strategy to achieve the following goals: Securing data-on-the-wire between my server and MongoHQ. Encrypting all data-at-rest with MongoHQ (possibly key values as ...
2
votes
0answers
97 views

Can HTTPS or VPN connection be sniffed through UTM device? [duplicate]

Someone told me that if my device communicates with a server on Internet via VPN connection or HTTPS, all the contents that I have sent can be sniffed and decrypted by the UTM device (or more ...
1
vote
1answer
931 views

Are post requests secure?

If a post request is sent from a client on a website without SSL, is the request secure? For example, I visit a site badsecurity.com, and I login using a password: Will this password be encrypted ...