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

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4
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4answers
1k views

Is it a security risk to use an unknown web browser?

The more I read about TLS, the more I get convinced that the browser is the weakest link in the chain. I know that nobody agrees with me as there are no articles about that in Google, but it looks ...
0
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2answers
75 views

is Digital Signature vulnerable on the Internet?

We all know about how Digital Signing works. I just have some questions about vulnerability risk. At first, As I know, the Signature and the Data are separated and we can split the document into two ...
0
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2answers
47 views

How are “Certificate Signing” key usage certificates restricted to what domains they can sign?

Many big websites use their own intermediate signing certificates to generate SSL certificates for their domains. The intermediate certificates are issued by the usual root CAs but have a "Certificate ...
1
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1answer
49 views

SSL - Main and Child servers network

There is an embedded device which acts a client. It communicates to a server via POST method whenever it has any data to be transmitted to the server. Embedded device: 1. Acts a Client 2. Does not ...
1
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1answer
148 views

advantages of http basic authentication over token-based (e.g. oauth2)?

I am interested in the question if there are any possible advantages to securing a given REST API for web clients and mobile apps with http basic authentication (over https of course) over a ...
2
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1answer
124 views

How to secure my ajax call to the backend?

In my website I'm using an ajax call to get some information from the backend. Even if I'm using SSL someone can intercept the call and replace the real response with a fake one. Is there a way to be ...
0
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5answers
148 views

Are most MiTM attacks done to impersonate web sites, or simply decrypt traffic?

The more I read about impersonating web sites the more I get confused. Does an attacker need the private key of the server in order to impersonate a website or does having the private key simply give ...
4
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0answers
88 views

Why doesn't the 802.11 standard implement TLS for wireless handshakes between clients and routers?

Why aren't wireless handshakes sent using TLS? It seems like it would be relatively simple to implement, perhaps having the vendor insert the private key into the routers. That way WPA/WPA2/WEP ...
3
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3answers
487 views

How to fix SSL algorithm for more security [duplicate]

SSL uses Asymmetric Encryption like this : Server sends a copy of its asymmetric public key. Browser creates a symmetric session key and encrypts it with the server’s asymmetric public key. Server ...
22
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2answers
688 views

Effect on PCI compliance of not checking SSL certificate?

PCI DSS states: "[You must...] verify that only trusted SSL/TLS keys/certificates are accepted." Long story short, our payment service provider just asked us to please stop verifying their ...
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1answer
81 views

How can we represent SSL and Firewall in OSI Model? [closed]

I want to draw an architecture diagram for a general ERP application. In that I have come across a confusing point: where should I place the SSL and Firewall? I tried to figure out exactly where ...
1
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1answer
55 views

SSL certificate expired on the embedded device (a client)

I need some inputs for the scenario when the certificate expires which is stored on the embedded device on the network which is a client. Following is the explaination of the setup. The setup ...
4
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1answer
65 views

Is it true that certificates requested with a specific CSR can only be used on the machine where the CSR was generated?

Assume that I have created a CSR and I am going to buy an SSL certificate with it. Would I be able to use the SSL certificate on another machine than where the CSR was created? Someone I know ...
2
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1answer
55 views

Does client certificate do any encryption in https connection? [duplicate]

In Https connection asymmetric encryption (with Server certificate) is used during handshake and to create symmetric keys. Am I right that in this case client certificate does no encryption? The ...
23
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2answers
3k views

Passwords in plaintext?

I'm doing some research on the App of my telephone operator. I started Burp Suite on my Mac in proxy mode, I opened up the App on my iPhone and started to sniff some traffic. I pressed the "login" ...
1
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2answers
100 views

Burp configuration to allow SSL connection

I'm trying to capture Request/Responses using Burp on Mozilla. I've configured Burp Proxy on 8080 and have set same proxy settings on Firefox however when trying the Gmail link, Firefox gives "This ...
0
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2answers
800 views

Now that CloudFlare offers potentially-insecure free SSL to all users, would a new HTTP header be useful?

I'm not sure where to post this, so I figured I'd just post it here. CloudFlare is now offering free SSL to all sites. There are two different types of SSL connections, however. There's "Flexible ...
0
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2answers
149 views

Self-signed certificates and internal cURL requests

I'm using an internal API for some commercial software we purchased and it recommends using SSL when utilizing the API; it uses cURL to achieve this and hence the user, pass and key will all be passed ...
0
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1answer
46 views

Can I sign a new certificate with a previously paid for certificate [duplicate]

For the last few months, I have been using self signed certificates to provide ssl for a system that I have been building. We are now getting ready to start getting external users on the system, but ...
6
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2answers
469 views

Storing SSL certificates in DNS records

Why not get rid of all certificate authorities and all the special kind of SSL certificates there are (extended validation etc. etc.) and instead just require anyone who wanted SSL to write their own ...
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1answer
83 views

Recommended Key Usage for a client certificate

My program has the following flow: a client sends a CSR to server, the server sends back a client certificate and after that the client communicate with the server to a path that requires a ...
2
votes
1answer
87 views

Search for user credentials within a packet capture of a gmail session over SPDY

I was reading this paper on SSL/TLS from the SANS Reading Room on how to capture and decrypt your own SSL traffic with Wireshark. I wanted to capture the credentials used to login to gmail. When the ...
3
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1answer
315 views

How to disable cipher RC4 in ubuntu 12.04

I have been doing Network Scan for our box and Ncircle reported SSL Server support RC4 ciphers for SSLv3. Based on that I did a search and I plan to add to /etc/apache/conf.d/security the following: ...
0
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1answer
117 views

Can anyone with access to root CA private key decrypt HTTPS traffic?

Can anyone with access to root CA private key decrypt HTTPS traffic of sites using certificate signed by that CA ? and if yes do he need to be man-in-the-middle or just monitoring traffic is ...
1
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1answer
67 views

SSL heartbeat design [duplicate]

So, about Heartbleed again, why does SSL/TLS allow the client to specify the message and its length in the heartbeat requests, rather than sending a simple ping?
0
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1answer
115 views

Why are CA's now signing root certs with SHA2?

I see that CA's are now giving the option of having the root CA cert signed with SHA2. I have been told that the hashing function in a root has no security value, and is irrelevant as far as a ...
3
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1answer
77 views

Forward Secrecy in TLS-PSK

I'm reading RFC4279 (Pre-Shared Key Ciphersuites for Transport Layer Security), Section 7.1, which is about Perfect Forward Secrecy. In that section, it's said that PSK/RSA_PSK ciphersuites don't ...
1
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1answer
126 views

Can't I forge an SSL certificate? [duplicate]

I read What's keeping a malicious man in the middle server from forging a valid certificate?, but when the client goes to verify the certificate, can't an attacker intercept that connection and say ...
0
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1answer
54 views

How could SSL certificate affect the symmetric key length?

This article in GoDaddy support knowledge base says All of our SSL certificates support high-grade 256-bit encryption How would they not support it? The SSL certificate contains keys for ...
0
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2answers
100 views

Can Subject Alternative Name(SAN) Certificate install on different Web Server or OS?

Let say: application.house.com apache tomcat : physical server email.house.com apache tomcat : virtual finance.house.com Oracle Wallet Manager : physical server ...
0
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0answers
45 views

SSL Certificate and IDS\IPS

I'm currently drafting an infrastructure design to provide web (internet) access to a number of users to an internal web server in our perimeter DMZ, we have no direct internet access but we do have a ...
10
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5answers
2k views

Why can't I decrypt SSL traffic with the client's private key only?

I have found that I can decrypt SSL traffic in Wireshark with the server's private key. Why isn't the client's private key enough to decrypt SSL traffic?
0
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2answers
189 views

What does 2^77.1 calls presented in a SHA1 attack mean?

Regarding the SHA 1 deprecation, I found this information here: http://blogs.technet.com/b/srd/archive/2013/11/12/security-advisory-2880823-recommendation-to-discontinue-use-of-sha-1.aspx I know ...
0
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1answer
80 views

SSL cipher suite: what does “export” mean?

I saw a cipher suite EXP-EDH-RSA-DES-CBC-SHA, EXP stands for export, How do I explain the "export"? What is the different between "EXP-EDH-RSA-DES-CBC-SHA" and "EDH-RSA-DES-CBC-SHA"?
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0answers
35 views

Signed an executable; appears as unsigned on VMs?

I signed my binary with a certificate issued by GoDaddy. It seems that myself and everyone I could get to test it for me confirms that it is indeed signed (much like signtool verify) However, when I ...
0
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0answers
34 views

What certificate attributes can I check to verify if an issuer is correct?

Apologies if this is a duplicate question. I thought I saw this discussed earlier but couldn't find the thread when searching. What attribute can I check to verify if I have the correct ...
3
votes
1answer
146 views

How will SHA1 deprecation affect internal CA's?

I am hearing that the SHA1 Deprecation notices from MS/CHROME only apply to certs that are a part of a public trusted root program. This makes one believe that IE will have new logic built in to allow ...
0
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1answer
164 views

Password stolen on public wifi even though https was used [duplicate]

I saw this video where news reporter is in public place, and some security expert demonstrates to her that even though she logged in at page which was using https that guy got password in his ...
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1answer
79 views

A future heartbleed bug? [closed]

Checking out IBM.com and Google.com: https://www.ssllabs.com/ssltest/analyze.html?d=ibm.com&s=172.230.109.66 Valid from Tue Sep 09 14:00:34 UTC 2014 ...
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2answers
80 views

Why the Websense blocks same site when used with http & not when used https? [closed]

I have been working in a IT firm. I have access to some social sites. When I try to open site Links in mail (that are having http://), the websense prompts me that the access is blocked. However, when ...
0
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0answers
62 views

Security considerations for RESTlike HTTP API of an embedded system

I'm designing a HTTP service for an embedded device and wondering if the following security concept is good enough: SSL(Up to Version 3) is enabled by default, TLS is not by limitations of the ...
2
votes
1answer
50 views

How often should the DHE p and g factors be recycled?

I've been asked to enable DHE in our SMTP product. I'm stuck on this question: How often should the product regenerate its DHE p and g parameters? I've seen some implementations that use a cron job ...
13
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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 ...
3
votes
2answers
150 views

What role do hashes play in TLS/SSL certificate validation?

After coming across this question in the Hot Network Questions section and reading the related blog post by Google, I'm starting to become curious as to what role these hash functions play in TLS/SSL ...
0
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0answers
26 views

How should a captive portal handle SSL requests, that are expired, or not authenticated?

What is the best course of action for a user that uses HTTPS anywhere, or tries to access a secure URL (from an phone based App, or from a browser)? Ideally, I'd like to get the phone to "prompt" via ...
0
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0answers
497 views

HTTPWebRequest over SSL gives intermittent error “The request was aborted: Could not create SSL/TLS secure channel”

I am using HTTPWebRequest to connect to Java rest services hosted in Tomcat Apache server. The endpoints are configured for HTTP as well as HTTPS. There are no issues connecting to HTTP endpoints, but ...
17
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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
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1answer
47 views

Does the SSL/TLS client certificate “hash over all previous messages” step hash the entire TCP packets or just data?

We have which uses TLS client certificates as it's authentication mechanism between client and server. There is an IT department which wants to run this app through a firewall/proxy device of some ...
1
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1answer
339 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
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1answer
107 views

Apply SSL for domain that I do not own

As part of a project that my company is doing, we need to setup a development server. Let's say our company's main domain is example.com We need to be able to access the dev server through ...