1
vote
2answers
95 views

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

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 ...
2
votes
2answers
93 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. ...
4
votes
2answers
521 views

Securing remotely accessible IP cameras that do not support HTTPS

I have some IP cameras set up on my home network, which is WPA2 protected. These cameras are setup to be accessible from the Internet thru my router's DDNS address, and port number. So for example, ...
9
votes
4answers
271 views

What are the main security considerations that must be taken into account if you intend on creating a (localised) whistleblower website?

Also: Is it something that can be achieved with limited funds? I ask because I am intrigued by the obstacles that are in place.
0
votes
1answer
98 views

Securely transmit sensitive data

I am creating a java application which is dependent on a server. On startup the application will transmit sensitive information (passwords and emails) which will be sent to the server and from there ...
1
vote
2answers
174 views

Idea for hiding your mobile phones' location, and still be able to place and receive calls. Any suggestions?

The diagram below is a thought experiment that could provide a certain level of privacy to mobile (smart)phone users, beyond what they currently have. Some of it is purely theoretical, but it should ...
1
vote
3answers
117 views

How to guarantee privacy on files that I store

I want to create an Android app where users from an office (typical use) can upload scanned documents to the app backend service for later use. e.g. A lawyer want to upload a sentence ...
3
votes
2answers
395 views

Why don’t SMTP servers just require all senders to be authenticated before accepting mail?

Why don’t SMTP servers just require all senders to be authenticated before accepting mail?
3
votes
2answers
1k views

What is the difference between SSH and IPsec?

There seems to be similar encryption going into both. They both use asymmetric (RSA, elliptic curves, etc) for the initial key exchange, then go to some symmetric (AES, Blowfish, etc) protocol. I'm ...
2
votes
1answer
312 views

How can I secure IP Multicast traffic?

I'm interested in securing IP Multicast traffic for content that will be sent globally with several low bandwidth receivers. I understand that simplified Broadcast encryption takes N public keys ...
2
votes
2answers
475 views

What order is best for nesting VPNs?

if anyone is available to give me advice on a VPN situation I'd appreciate it. So the story is, I have one Swedish VPN which I trust not to log, and which I've connected to with my real IP, and I've ...
1
vote
1answer
762 views

Open source video conferencing software with encryption [closed]

A couple of friends and I are looking for an open source video conferencing software. We'd like to run the server on a Debian box, but the clients are Windows machines. Most importantly, it should ...
0
votes
3answers
135 views

Can a computer's contents be downloaded wirelessly?

So my calculus teacher, who also teaches computer science, claims that a computer's entire filesystem can be downloaded wirelessly by anyone on the same network? As a Ruby on Rails professional, ...
2
votes
3answers
1k views

Is there an alternative to TCP/IP that encrypts end-to-end?

If there was a communication protocol that encrypts at the very low-level, this would solve the problem of wiretapping entirely and for all.
3
votes
5answers
3k views

Encrypting All Network Traffic

For a corporate network, is there a way to possibly encrypt all network traffic on the local network? I would like to ensure that there is nothing left for chance to be packet sniffed. Not even ...
0
votes
1answer
532 views

Man-in-the-middle attack over an encrypted channel

I learned recently about man-in-the-middle attacks and came up with this question. Let's say we have two computers who try to communicate over the network. Each computer has an encryptor and a ...
2
votes
1answer
339 views

Protect an application that uses internet from packet sniffing

I developed a stand alone application such a way that, application use a remote service (using SOAP/REST) which available WWW. I am using HTTPS though out the application calls. It was perfectly ...
2
votes
0answers
92 views

Is the GTK or MIC in the unencrypted portion of a WPA protected frame?

In order to decrypt traffic you must have all 4 portions of the WPA Handshake. In WPA protected data frames, is there an unencrypted portion of that frame that has some sort of identifiable value to ...
6
votes
4answers
12k views

Can Skype chat be protected from snooping? Are there safe alternatives?

I use Skype a lot. With all of my clients, staff, contractors and friends, however, the acquisition by Microsoft worries me, as two of my clients are direct MS competitors, and I often work on long ...
4
votes
1answer
3k views

Exchange of DEK and KEK (encryption keys) between app server and key server

In my application, it is required to encrypt a user's data before inserting it into the mysql database. I am using AES algorithm to encrypt the data using a 256 bit hash (and is calling it Data ...
6
votes
2answers
6k views

Is it possible to use the aircrack-ng tool to crack a WPA2 Enterprise network?

is this tool (aircrack-ng) capable of cracking into a WPA/WPA2 Enterprise network? This tool has major success cracking the passwords of WEP/WPA networks. If it can, how, but if not, is there another ...
2
votes
1answer
188 views

What security risks are involved with sending data over the internal network on Rackspace Cloud servers?

What are the risks involved with sending unencrypted data over the internal network with Rackspace Cloud Servers? Assume the interfaces use iptables to filter IPs and ports so they only accept data ...
6
votes
2answers
505 views

What risks does WPA carry?

A family member of mine would like to be able to play old PSP games online. Unfortunately the device does not support WPA2, and my network is strictly WPA2 AES secured. What are the risks involved in ...
2
votes
2answers
366 views

AES CBC over TCP - when is new IV needed

I am working on a project where two devices will be communicating with AES with CBC over TCP. We already have a secure mechanism for sharing the encryption/decryption key. I am not sure if we need to ...
2
votes
3answers
301 views

Without SSL, what vantage point does one need to MITM non-SSL'd HTTP?

OK, so there are two things here: being able to read the content of the requests and responses, and then being able to modify them. The former may depend on the latter, I'm not sure. But basically, ...
2
votes
2answers
3k views

How to set up a user-friendly NAS encryption?

We recently installed one NAS drive (Buffalo LinkStation Pro Duo, LS-WVL, running the most recent Firmware version 1.6 to be precise) in our (small) company network. Currently, there is no encryption ...
4
votes
1answer
167 views

How does my antivirus determine which CTL is used?

I have imported a trusted root certificate into the Windows local machine list. This works fine with my signed certificates, unless my AV (Bitdefender Antivirus Plus 2012) is set to "scan SSL", in ...
4
votes
6answers
1k views

Tracking unique web site visits without logging IP addresses

On Monday, some IP address xxx.xxx.xxx.xxx visits my site. I log it. On Tuesday, another IP address yyy.yyy.yyy.yyy visits my site. I log it. If the two IP addresses are equal, I throw out the ...
9
votes
5answers
2k views

Can voice chat be spied?

I wonder if voice chat (via public services like yahoo, google talk, skype, etc) is practically secure? Is it possible for the ISP or any middle point? I do not consider hacking the computers, but ...
3
votes
2answers
1k views

How to use RC4 securely

I want to encrypt my network communications with RC4. The reason for choosing RC4 is the simple implementation and speed. I need to have a pure Python implementation, because I cannot compile for my ...
8
votes
2answers
2k views

Using RSA with 3DES instead of plain 3DES. Does it make sense?

I have a large legacy code. Currently it is using 3DES encryption for a network based application. It encrypts data packets with a main key. This key is used to encrypt and decrypt (symmetrical). And ...
1
vote
1answer
161 views

What does Bluffdale mean for privacy?

I posted a question related to tracing webserver attacks over here and the responses got me google-ing. My understanding has always been that privacy is dead and that essentially there's always ...
1
vote
3answers
205 views

will all instrusion dectection will become host-based? [closed]

Will all intrusion detection become host-based once all network packets have been encrypted?
2
votes
1answer
526 views

Is SSL session based only? Is there a (formal) definition of an SSL connection?

In various docs on SSL there is a mention of connection. But from the context I am not sure if this means the underlying TCP connection or the SSL connection. I am thinking that there is no SSL ...
2
votes
1answer
380 views

How can wireless router password encrypts data using WEP and WPA

How does the password that we enter (to connect to a wireless network) encrypt the data on the wireless network? Through my reading I am not sure if the password that we enter is the same as the ...
3
votes
5answers
355 views

Securing data transfer between public network and personal accounts

I would be traveling soon and I am looking for all kinds of ways to encrypt the data transfer (usernames, passwords, emails ...) between the new networks to which I will connect my Laptop, that is ...
7
votes
2answers
8k views

sniffing/recording GSM 3G signals

Is it possible to sniff or record and process GSM 3G signals (from some reciever) given that there is no other signals interrupting etc (the most comfortable conditions) Update (with some supporting ...
8
votes
3answers
933 views

Secure PXE network OS installation

How can one make sure that when PXE is being used to boot a remote operating system, that the data being sent is encrypted (or at the very least that integrity is maintained)? Would it be possible to ...
29
votes
8answers
11k views

Are powerline ethernet adapters inherently secure?

I have 2 Zyxel PLA407 powerline adapters. Router is downstairs connected to one adapter, other adapter is upstairs about 30 feet away connected to a desktop. I have a house, not an apartment or ...
8
votes
3answers
8k views

How do I ensure data encryption on Samba transmission on *NIX systems?

I have a heterogeneous system (both MS and *nix) that communicates with CIFS/SMB. How can I ensure proper data encryption at the application layer?
12
votes
3answers
2k views

How are mobile telephony networks like LTE and HSPA encrypted?

How are mobile telephony networks like LTE (4G) and HSPA (3G) encrypted? between what parts is the communication encrypted? who has access to the keys? is symmetric or asymmetric encryption used? is ...
4
votes
2answers
656 views

Which is the easiest secure file transport protocol to implement (SFTP, FTPS, HTTPS, FTP over SSH, FTP over IPsec)

I have to select a secure file transfer protocol, to be implemented in a pre-boot system. I have access to libraries with the basic network functionalities (IP, TCP, UDP, etc...). I might also have ...
1
vote
5answers
6k views

How to properly encrypt a communication channel between a client and a server (without SSL)?

I have a poor knowledge in the world of cryptography, I'm just starting to learn it so I'm a newbie :) As a project for getting into the field of cryptography I want to write a client\server program ...
7
votes
3answers
2k views

Encryption on mobile phone - myth?

Well, about six months ago I had pleasure to meet Harald Welte and when he talked about m-banking (banking via smartphones) he said that the most people thing it's safe while, in fact, mobile ...
10
votes
1answer
1k views

Native rsync protocol security

Is the native rsync protocol (port 873) secure? Does it encrypt data or credentials? I'm planning on using rsync to store encrypted files in the cloud, I'm wondering whatever the password is ...
2
votes
2answers
192 views

Which private-key encryption should I use for server to server communication?

I am tempted to write my own which covers: Checksum to ensure data is not tampered with. Long and multiple rotating keys so that it is (practically) impossible to decrypt. Will use /dev/random for ...
8
votes
2answers
407 views

How do you Secure VOIP in a large organization

As part of a large organization looking to implement VoIP, to get on the bandwagon of savings and converged network focus, I'm being asked to look at the security concerns to develop a policy to help ...
5
votes
1answer
808 views

What is the value of encrypting a payload when it will be transferred over sftp anyway?

We have a integration arrangement to send content across the internet and the agreed protocol encrypts then sends it via sftp. What possible reason coould there be to encrypt the content twice? I ...
2
votes
1answer
2k views

How to find out if a connection encrypted?

I'm sniffing a connection that uses ICEP (ZeroC ICE Protocol), and its packet bodies compressed using BZ2 (GNU BZip 2) algorithm. I want to find out whether packets encrypted, or not. ICEP can use ...
6
votes
5answers
13k views

Multiple VPN clients in parallel

If I were to run more than one VPN clients on my machine, simultaneously, what risks would be involved? E.g. are there technical conflicts, such that it wouldn't work right? Could there be ...