0
votes
3answers
10 views

Generating SSH keys and sending the private key

I've been looking up on how to set up public key authentication between two hosts on my LAN. I am going to be using a pass phrase with my key pair. A lot of tutorials instruct me to generate the key ...
0
votes
0answers
18 views

Why is my website getting spammed?

Does any one recognize this type of spam? " NAME :Bagas EMAIL :dq95zxm7l@gmail.com PHONE :JCBUIR6ulwtO COMMENTS :I must express apaotcipeirn to the writer for bailing me out of this particular ...
1
vote
1answer
25 views

Session vs Cookie Authentication

Here what I means by the two : Session Authentication : Stored "Is authenticated" state in a session variable. Cookie Authentication : Stored "Is authenticated" state in a cookie protected from ...
2
votes
2answers
804 views

Is the standard scheme of RSA CCA and CPA secure?

I'm looking through old tests in an information security course - and there's a question about CCA and CPA security of RSA. I can't seem to grasp how I'd either show insecurity or prove the security ...
4
votes
2answers
120 views

Is compiling untrusted code safe?

I'm curious about compiling with gcc/g++/clang with the assumption that headers and implementation files are user-provided, but not the build configuration. (i.e., no cd lib && make) What if ...
2
votes
2answers
46 views

DMZ and mail servers

I've seen a few DMZ related questions here in the past, but wanted to ask one directly related to email. I've done some research on this, but wanted to ask the forums opinion. I know it's best ...
1
vote
3answers
141 views

What options exist for authenticated full-disk encryption?

Title says it all really. I'm toying with the idea of storing some disk images in "the cloud", but am concerned about the possibility of an attacker manipulating cipertext to do evil things once it's ...
-1
votes
2answers
26 views

Can the payer of my cell bill listen to my calls?

I am not an IT person so I'd need a simply-worded answer. I'm considering getting a smart phone, and someone else would be paying the bill, someone I don't necessarily trust. I'd like to know: would ...
1
vote
2answers
10 views

Combinations of key exchange and signature algorithm in TLS

Let's say that one does not trust ECC a lot, and values confidentiality over authenticity (perhaps simply for the reason that MitM is more difficult than passive eavesdropping and decryption later ...
1
vote
0answers
7 views

Distributed tokenization for credit card numbers

I have two locations within the same firm that hold credit card numbers. I want to be able to "join" on credit card number to do business analytics after transmitting card number-linked data from one ...
4
votes
2answers
110 views

Can a Windows 7 PC with folder sharing and remote desktop disabled, still be penetrated by a rogue computer on the same WiFi or LAN?

Assume the network is already penetrated, and the attacker already fully controls another PC. Other than setting up a proxy to intercept traffic from all other systems on the network and use that to ...
2
votes
1answer
322 views

How does a password authentication over a TCP protocol actually work?

When coming up with a password based login protocol, many solutions come in mind: User sends password in plain text. Compute hash on Server, compare to hash in database. - Bad because attacker can ...
6
votes
3answers
369 views

Can I expose a passphrase-protected private OpenPGP key?

I have created a 4096-bit key-pair using GnuPG. Can I expose the passphrase-protected private key to an untrusted system? E.g. can I put that key in my Dropbox account or send it to myself as an ...
1
vote
0answers
22 views

Are there any tools out there that can 'trick' keyloggers?

Are there any tools out there that can 'trick' keyloggers? I was wondering if there's any 'enigma-style' tools available along the lines of providing time-randomised keyboard mappings. For example: ...
1
vote
1answer
43 views

Security server log review [on hold]

We have a Kiwi Syslog server for Centralized logging purposes. Currently, our focus is only on monitoring, reviewing and reporting User Account/Password Violations. We already used the necessary ...
0
votes
0answers
7 views

What if a resolver doesn't support DNSSEC?

I've been reading about DNSSEC lately and had a question about DNS-Resolvers installed elsewhere on the internet. If a client is using a DNS-Resolver that doesn't support DNSSEC will it fall back to ...
1
vote
2answers
41 views

Can Client Certificates be tied to a Specific Server Certificate?

I have a Root Certificate Authority and and Intermediate Certificate Authority. I have created a certificate for the server. SSL on Apache is working fine. Browser recognizes my Chain of Trust with ...
1
vote
0answers
6 views

Is it secure to use HttpSessionState.Session to store Identifying Information

I am writing an ASP.NET web app. Is there anything that is insecure to store in HttpSessionState.Session? More specifically, is it ad practice to store such information as UserID, or security ...
2
votes
1answer
89 views

How much does knowing the zxcvbn password strength help an attacker?

On an answer to the question How critical is it to keep your password length secret?, Mike Ounsworth commented that by storing the zxcvbn-calculated entropy of a password you make it easier for an ...
6
votes
2answers
3k views

When do you use OpenID vs. OpenID Connect

Can they be used together? ....or are they two separate protocols that may or may not be useful depending on the context? The reason I ask is because I'm trying to implement the following: User ...
0
votes
1answer
20 views

PCI Compliance and fines

Our organisation has validated compliance with PCI DSS. What are the consequences to us if we had been breached by a security incident related to credit card information, considering we have validated ...
23
votes
8answers
2k views

How do malicious software encrypt victims' files?

Encrypting a file to me is to take the contents of the file and dealings with it as a very long string, feed it into the hashing or encryption function to get an other long encrypted string (or a hash ...
40
votes
4answers
66k views

How do I use “openssl s_client” to test for (absence of) SSLv3 support?

In order to mitigate the "Poodle" vulnerability, I'd like to disable SSLv3 support in my (in this case, TLS, rather than HTTPS) server. How can I use openssl s_client to verify that I've done this?
3
votes
2answers
102 views

Cryptographic algorithm to anonymise strings in pronounceable fashion?

NB: I originally posted this on SO (link), but then realise Security SE be more suitable, since there's existing questions around Crypto-PAn, which is similar here I have a logfile of database ...
3
votes
1answer
42 views

HPKP-based persistent denial-of-service attack on web sites

HTTP Public Key Pinning (HPKP) is a standard that allows a HTTPS website to specify which certificates it trusts, and instruct the browser not to allow any connection to that site that's secured by ...
3
votes
2answers
908 views

How configure tomcat 7 SSL to use AES-NI?

My server has AES-NI and I would like tomcat 7 to make use of this but I am not really sure how to make that happen or where to even start looking. I am quite familiar with tomcat administration, and ...
1
vote
2answers
140 views

What type of encoding do .pem files use to store the key?

What encoding is the modulus in RSA cryptography stored as in a .pem file? Is it something similar to base64 of the modulus? I can retrieve the modulus using the following: openssl rsa -in ...
2
votes
1answer
94 views

Where to store hashes, salts, keys in Desktop Applications

I am trying to figure out where or how i should store application secrets and keys inside a desktop application. For example a facebook app key or dropbox key and secret. So I've read that i should ...
0
votes
0answers
17 views

Comparing Oauth and JWT auth in my web application

I have created an e-commerce website which has a REST API on the server side and Angular on the client side. I am considering to use OAuth to secure my API, but it seems to overkill because I have no ...
18
votes
7answers
2k views

Is there a way to make a WEP-secured AP uncrackable?

For some days I was feeling that my Internet bill was booming. Then I recently found out that a boy near my house was accessing my router to use the Internet. Then I read some articles how to crack ...
42
votes
6answers
7k views

Why do security experts like Snowden use email services like Lavabit and Hushmail rather than self-hosted email?

Why would anyone like Edward Snowden rely on 3rd party services like Lavabit or Hushmail to host his email? I mean it's very easy to set up a self-hosted email server. What you need: Rent VPS (even ...
2
votes
0answers
37 views

How to do side channel attack on smart cards? [on hold]

Assume that I have a smart card and I want to do a differential power side channel attack on its mutual authentication mechanism. This is the mutual authentication mechanism that my card using(Let ...
1
vote
1answer
45 views

Advantage of Group signing over single signing

As i known signing is used to ensure integrity and authenticity of sender. What is the advantage of group digital signing over individual signing. Can anyone explain using a scenario?
5
votes
2answers
539 views

HSTS bypass with SSLstrip2 + DNS2proxy

I am trying to understand how to bypass HSTS protection. I've read about tools by LeonardoNve ( https://github.com/LeonardoNve/sslstrip2 and https://github.com/LeonardoNve/dns2proxy ). But I quite ...
1
vote
1answer
2k views

Firefox:Secure connection failed(Error code:ssl_error_weak_server_ephemeral_dh_key)

A screenshot of the problem: Browser: Firefox 39.0 Is this a problem with my browser? How can I solve this?
1
vote
0answers
38 views

Should Mozilla SSL3/RC4 whitelisted sites be blacklisted by admins/users? [on hold]

As of Firefox 39, Mozilla has dropped support for SSL3 and RC4... and whitelisted 519 (!) non-compliant sites: ...
1
vote
0answers
12 views

Vulnerability NTP:Traffic amplification in clrtrap feature of ntpd affect or not affect to Cisco device?

I am using CCSVM tool SAN for Network devices (Cisco). Below you can find the scan result: Title vulnerability: NTP: Traffic amplification in clrtrap feature of ntpd Solution fix: Disable NTP ...
-2
votes
1answer
48 views
0
votes
0answers
13 views

Add a scheduled task to the GPO progrematically

The assumption is I'm on a DC with admin rights. I want to add an immediate task to the GPO to run a .exe on the workstations, but I want to do it without the GUI i.e. quietly. Is there a way to do ...
8
votes
2answers
270 views

Bootstrapping an EC2 Spot Instance

I'm considering using EC2 Spot Instances in an automated fashion (ie create a script that will request EC2 Spot Instances that will run unattended). For this specific use case, I'm happy to lock down ...
1
vote
1answer
99 views

Chrome showing SSL warning about SHA-1 when the sites don't use SHA-1

My version of Chrome on an iMac (latest 43.0.2357.130 (64-bit)) is showing an SSL warning for well-known sites (Hackernews, GitHub, DigitalOcean): This site uses a weak security configuration ...
5
votes
1answer
549 views

Is it possible having only public key from SSH keypair to see if private key is password protected?

As a person responsible for security I wonder on this subject. To provide best security I don't want to accept/deploy public keys for users if private key is not password protected. However there ...
2
votes
1answer
17 views

Requirements Placed on a User of a FIPS 140-2 Validated System

Per customer requirements, I am working with a FIPS 140-2 validated network switch that is actually running in FIPS mode. This guarantees that any cryptographic operations the device performs will be ...
1
vote
1answer
42 views

How to make sure my HTTP server on Win 7 is secure? [on hold]

I'm hosting a HTTP server from home. I'm concerned about security issues since the machine has some personal files in it. I have forwarded data from external IP port 80 to my IP at port 80. The ...
0
votes
3answers
12k views

HTTPS icon red and crossed out - Chrome browser

I just would like to ask what actually means when HTTPS icon is red / crossed - out. Is this site is vulnerable to Man in the Middle Attack? Is it safe or not?
0
votes
0answers
24 views

Is there a pre-established method for cracking RSA SecureID codes?

I am using the most modern version of RSA SecureID's tokens with a RSA server (used with a lot of governments and larger organizations ). I was just wondering if there was a pre-established method for ...
0
votes
1answer
35 views

Virtually isolate a server test environment

What is the minimum implementation that ensures some test servers (like domain controllers) don't send out network traffic that crosses over with production systems? The purpose would be to setup a ...
2
votes
2answers
274 views

Secure database password stored in an env variable

I need to somewhere store my DB password on my production environment to access the DB. At the moment the prod system is deployed in the cloud, so is the DB. The password, the username and some other ...
0
votes
2answers
206 views

Disabling CBC ciphers does not stop Chrome from negotiating to use CBC ciphers

I am getting an message about 'obsolete cryptography' from Chrome. Your connection to (site) is encrypted with obsolete cryptography. The connection is encrypted using AES_256_CBC... Per ...
2
votes
2answers
41 views

Multiple Versions of SSL Signing Certificate

I was checking out the SSL chain on onlineaccess.ncsecu.org because a network glitch made me paranoid. Both Firefox and IE on my computer have this chain: onlineaccess.ncsecu.org Serial number ...

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