Tagged Questions

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

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0
votes
0answers
5 views

TLS authentication on Openvpn server

I'm not sure if this question can be applied elsewhere and that's why posting it here. The matter is that I want to setup hardened(as far as possible) VPN server. No the issue is that tls handshake ...
0
votes
1answer
22 views

Effective Free and Anonymous Web Form Encryption

I've got a website and I would like the users to be able to login securely but I don't want to spend any money on SSL / certificates and I would like to stay anonymous i.e. not give the certificates ...
0
votes
1answer
34 views

Poodle vulnerability and eCommerce

Our client has recently stopped getting new orders placed on their Magento eCommerce site. Could this be related with the Poodle vulnerability, as their server is still on SSLv3. Is there any ...
2
votes
1answer
74 views

Do payload sizes reveal URLs when HTTPS is deployed on news, blogs, etc?

Even though HTTPS keeps HTTP paths private, is it not the case that the generally-unique payload sizes for particular URLs (on news articles, blogs, etc) provides a mechanism to reveal the URL anyhow ...
-1
votes
4answers
77 views

How and why does not having https allow people to trace my browsing habits if at home? [on hold]

How can my browsing habits be traced when I am at home on my own local network? Technically how is it done ?
2
votes
5answers
154 views

Can we have https without certificates?

I apologize in advance if I am fundamentally misunderstanding something, but is it possible to have encrypted communication protocols (https, I suppose) without resorting to a certificate system? ...
0
votes
2answers
44 views

Sign SSL certificate with root certificate using openssl

I have created a root certificate, My Root Certificate, with a private key, RSA Private Key 1, using the openssl terminal command. I would like to make a certificate chain such as the following: My ...
1
vote
2answers
37 views

Invalid OCSP signing certificate in OCSP response

I want to open the following page in Firefox, and get an error. https://www.acm.nl/nl/ Secure Connection Failed An error occurred during a connection to www.acm.nl. Invalid OCSP signing ...
0
votes
0answers
58 views

sniff https traffic and grab credentials with ettercap [on hold]

how to access a website with the session id ? thanks very much!! I have the session id but I don't know how to use it
1
vote
2answers
93 views

Will CA's still validate internal IP's in SSL certs?

Just wondering what Certificate Authority (CA) policy is nowadays on validating someone's internal IP address in a certificate? I have heard that some CA's used to do this but won't anymore.
0
votes
2answers
34 views

Why does IP address need to be listed as a DNS name in SAN/UCC certs?

I have heard that when creating a CSR that if you want to validate an IP address that you should list the IP as a "DNS" name and not "IP Address". I have actually had to re-create CSR's like this to ...
2
votes
2answers
143 views

What's the difference between X.509 and PKCS#7 Certificate?

Am I correct calling file with .p7b file extension saved as 'Cryptographic Message Syntax Standard - PKCS#7 Certificates (.P7B)' in Windows - a 'PKCS#7 certificate'? Or is it better called 'X.509 ...
1
vote
1answer
68 views

How does a browser choose which certificate to use if my web server has multiple certificates?

I'm using Apache 2.4, with two certificates, one RSA signed by CACert, and one ECC self-signed. Neither of these certificates provide a path to a broswer-trusted root certificate. My question is ...
1
vote
4answers
72 views

employing SSL even on non critical web server [duplicate]

I know that SSL should be used on web servers that need to gather credit card information etc..however, is it industry best practice to also turn on SSL even for non critical web servers? eg those ...
0
votes
0answers
36 views

Question regarding SSL / TLS / Certificates in general [duplicate]

for the last two days I played around a bit with nginx's SSL configuration. A question came up: I created asymmetric key using $ openssl req -x509 -sha256 -nodes -days 365 -newkey rsa:4096 -keyout ...
0
votes
2answers
44 views

Storing CardHolder Data using RC2 encryption

I would like to know if storing credit cardholder data using RC2 encryption requires to be compliant with PCI DSS. Currently the 16 digit PAN number and expiry date is stored in the database. The PAN ...
1
vote
0answers
23 views

What are the compatibility implications of generating a new TLS key?

The guide I'm following says to use openssl genrsa to generate a TLS key, which I did. I've changed the CSR generation command to use SHA256 instead of SHA1, but I'm still not sure if this is the ...
2
votes
1answer
124 views

TLS library problem when connecting to Dovecot

I have a Comodo PositiveSSL certificate issued for mail.btcontract.com and I've set up Postfix and Dovecot to work with it in the following way: Postfix main.cf: smtpd_tls_cert_file = ...
0
votes
1answer
38 views

How to change the expiration time for the pkcs certificate?

I have an application (which I'm testing), in which I create some services. These services are accessible via libraries i.e java and python apis. In order to authenticate the api calls, the ...
2
votes
1answer
213 views

Are Java applications vulnerable to CVE-2014-6321 (WinShock)?

CVE-2014-6321 (also known as MS14-066) is a heap overflow vulnerability discovered by Microsoft engineers in Schannel, the SSL/TLS implementation used by Windows. My Java application uses SSL (JSSE ...
6
votes
2answers
415 views

Is TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 a safe cipher suite to use?

Is TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 a safe cipher suite to use for a TLS 1.2 connection to a Tomcat server? What are potential weaknesses or better alternatives? I am looking for a cipher ...
3
votes
1answer
97 views

Can Fiddler decrypt HTTPS traffic when using elliptic curves + client cert authetication?

Case 1 involves TLS + client certificate authentication with both client and server using secp384 based EC certificates. In this case, when monitoring traffic via fiddler, the tunneling/handshaking as ...
3
votes
2answers
410 views

In a browser web server communication, who decides which encryption protocol to use [duplicate]

My IE browser has SSLv3.0, TLS 1.0,1.1 and 1.2 has enabled in the advanced settings. And (I was informed by my server admin) my web server can encrypt data in SSLv3.0 and TLS 1.0 Now which system ...
10
votes
2answers
584 views

What role does clock synchronization play in SSL communcation

We've recently implemented WS Trust security over SSL for our client / server communications. Our application is used by thousands of our customers, spread out all over the world. One of the ...
1
vote
0answers
18 views

Possible to Mix SNI and Dedicated IP SSL on Apache? [migrated]

I've reached the limit of available IP addresses on my Apache web server but increasingly need sites to run under SSL. I'd be comfortable with some of the sites running under SNI but a few of them ...
-4
votes
1answer
54 views

How to create a secure channel in Java?

I am creating a certification server which takes some required details like name, email etc from clients and issues public and private keys using RSA along with digital certificate. Initially all ...
1
vote
0answers
47 views

How does SELinux effect the Linux Kernel networking stack?

I'm interested in how SELinux effects the processing of packets through the networking stack. I've found the following questions and answers: Network policies under AppArmor/SELinux Filtering ...
1
vote
1answer
80 views

Encrypting sensitive data in a financial form

I'm currently building a B2B E-Commerce site for a client using WordPress. We sell industrial machinery ranging in the upper $100k-$400k price range. My client would like to have their financing form ...
0
votes
0answers
22 views

What could be the reason for “SSL: No Application Data included”

I am trying EAP-TLS privacy, upon receiving change_cipher_spec and finish, and the same handshake has another request for client_hello_requset as a encrypted message, and openssl able to decrypt it ...
1
vote
1answer
26 views

Does OpenSSL have stat for read change cipher spec (SSL3_ST_CR_CHANGE_A)

In EAP-TLS method of authentication if a server sends Change Cipher Spec message to the client, I couldn't find references to SSL3_ST_CR_CHANGE_A. The enum is defined for SSL3_ST_CR_CHANGE_A in ...
1
vote
0answers
79 views

Running openssl s_client with an aes encrypted key fails

I'm trying to verify a 2-way SSL connection using the openssl s_client command openssl s_client -connect localhost:8883 -CAfile ca.pem -cert client.crt -key client.key The openssl s_client fails ...
0
votes
1answer
43 views

What happens if someone steals one of my additional domain controllers

What happens if someone steals one of my additional domain controllers? What information could an attacker get from my domain controller?
1
vote
5answers
88 views

Using Diffie-Hellman to verify SSL Certificate?

I am fairly new to encryption and I need some help. I have a problem that I'm trying to solve. My problem is the following: I have a Web Server and an (iOS) App that that communicate with each ...
9
votes
2answers
480 views

Is publishing CRLs over HTTP a potential vulnerability?

I noticed that at least one major CA (Comodo) publishes their CRL over HTTP rather than HTTPS. This seems to me to be somewhat of a vulnerability, as an attacker could hijack the HTTP connection that ...
0
votes
2answers
194 views

Avast https scanning

How does Avast's https scanning feature work? Is it basically a MITM attack? This feature was enabled in the 2015 version released a few days back
2
votes
1answer
36 views

What security layers of protection are available over XMPP?

I have been working on an application running over XMPP. I would like to know which all popular security layers are available over the XMPP protocol, similar to SSL over http.
1
vote
0answers
33 views

Force SSL/TLS version for Java RMI server/client [migrated]

Everywhere documented, it says Java RMI can apply SSL/TLS. I have a working sample of a client/server application that does exactly this. But how can i force the used protocol to TLS 1.2? I need to ...
2
votes
2answers
124 views

Security through obscurity - “https requests” are safe?

In an iPhone app that utilizes plain text (unencrypted) XML as the contents of its http POST requests over https to the app server; how would someone be able to discover the "format" of the plain text ...
1
vote
1answer
55 views

how to test on which TLS Version has https connection established between server and a mobile application ( Android and iOS )? [closed]

Testing for Poodle attack vulnerability. Also, I could sniff the packet from wireshark and see the TLS version. I want to find if there is any other way available by which I can test this?
1
vote
2answers
59 views

What would HTTP/2 TLS encryption provide?

https://en.wikipedia.org/wiki/HTTP/2 I know that a HTTPS connection provides: Authenticity: a website that I'm visiting is the real website that I intended to visit. Integrity: the data that is ...
6
votes
3answers
748 views

Why wouldn't it be great, if HTTP/2 would only allow communication via TLS? [duplicate]

https://en.wikipedia.org/wiki/HTTP/2 Earlier, encryption method TLS 1.2 or greater was planned to be mandatory as part of the protocol. However, in lieu of consensus for mandatory TLS, an ...
1
vote
1answer
307 views

Minimal HTTPS SSL client in C [closed]

I want to implement an HTTPS client using pure C. I have implemented an HTTP client, and it works just fine. My question is: I know the HTTPS protocol does some kind of negotiation to announce what ...
1
vote
1answer
190 views

SSL interception with Burp Suite using Firefox - Strange behavior when intercepting twitter

I am learning Burp Suite(Free Edition v1.6). I have set it up with the default settings. The proxy listener is listening to 127.0.0.1 on port 8080 and Certificate option is set to 'Generate CA-signed ...
3
votes
4answers
892 views

How to decode traffic on a LAN whose SSL certificates are expired

We have a campus Wi-Fi at my university and we authenticate through a log in page which to me seems like we are using a RADIUS server. Every time the page loads my browser warns me that the ...
-3
votes
0answers
10 views

I want to implement EAP TLS based authentication in my Java project how can I implement ? is there any API available in Java for using that protocol? [migrated]

I want to implement EAP TLS based authentication in my Java project how can I implement ? is there any API available in Java for using that protocol ?It will be great help for any reference .
1
vote
2answers
161 views

Intercepting SSL traffic on Android app

I am trying to intercept SSL traffic from my Android app to test the security. I am using certificate pinning in the hopes I can prevent people from snooping. I have tested by configuring ProxyDroid ...
0
votes
1answer
88 views

Mac OS X : Certificates signed by company trusted CA cannot be verified

I'm trying to setup a keychain on Apache Tomcat that contains a server certificate that was signed by a custom root ca certificate. (not sure if custom is the right word here, but it's a root ...
0
votes
1answer
38 views

Securing connection between redirect from A to B domain

I'm building special extension ( on domain B ) to the present e-commerce hosted on a domain A. The goal is to redirect user from A to B and back. Similar to technique where user leaves e-commerce site ...
1
vote
2answers
94 views

POODLE and REST APIs

Are non-browser applications which do not contain an embedded browser, and merely make REST API calls over HTTPS, vulnerable to POODLE? And if not, is it unnecessary to disable SSL in such ...
1
vote
1answer
40 views

Is using self-signed certificates an option for this m2m scenario

Imagine having a couple of hundred of embedded devices in the field that need to be remotely managed over SSH or HTTPS. These embedded devices are exposed on the internet but are installed at secure ...