Encryption is the process of transforming plaintext using a cipher to make it unreadable to anyone except those possessing the key.

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1answer
74 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
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2answers
149 views

Opinions on my “Encryption at rest” implementation idea

Ok so basic overview of the environment I'm envisioning: Webapp w/ db backend storing sensitive data, possibly phi; standard user:pass auth due to unteachable users. My idea was to encrypt row data ...
0
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2answers
127 views

How do I know that my connection is really encrypted?

I am using a VPN to ensure to encrypt my browsing. I wonder though if I could check somehow if the datastream really is encrypted?
3
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3answers
1k views

RSA Key Pair generation with Javascript

I need to generate a RSA key pair with Javascript. This key pair will be used for encrypting a one time blob of data (20-100kb), then discarded. This data can be reduced to a couple of hundred kb or ...
1
vote
1answer
96 views

What network protocol is Crashplan using?

I have been using CrashPlan for a while internally (i.e. local backup server). I would also like to setup off-site backup but my experience is that I have to forward a port from the router sitting at ...
3
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2answers
84 views

Link Layer authenticated encryption vs authentication

Many security articles discuss about adding an extra layer of security at the link layer by either authenticating the data at the link layer authenticating and encrypting it. If we have ...
1
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1answer
55 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
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2answers
687 views

What does Gazzang zNcrypt actually protect against?

In an effort to increase security of our website, I'm reading up on Gazzang zNcrypt, which claims to protect data in databases from breaches. Technically, it seems to do filesystem encryption. As far ...
13
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2answers
588 views

How Does A Random Salt Work? [duplicate]

I don't understand how using a random salt for hashing passwords can work. Perhaps random salt refers to something other than hashing passwords? Here is my thought process: The salt is used to add ...
0
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1answer
383 views

Can eavesdropping be facilitated by injecting content that will be transmitted?

I was asked during a job interview the following question, to which I couldn't find an answer then, and this thing is still bothering me. I was hoping someone might know the answer here: Consider ...
5
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1answer
3k views

Android / CyanogenMod encryption vs GNU/Linux

Hi I am trying to understand how encrypting an Android based phone works compared to a GNU/Linux host which relies on LUKS dm-crypt. Here is what I understand: Encrypted LVM on GNU/Linux is an ...
2
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1answer
2k views

How does small dish satellite secure their signal?

For example how does Direct TV's small plastic cards control who receives the TV signal? How is the signal encoded in a way that can allow future updates without the provider needing a new satellite? ...
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2answers
65 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 ...
4
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2answers
3k views

Strongest cryptographic algorithm available in PHP 5.3

Which options are available in the default installation and which ones by third-parties like extensions or frameworks? P.S. By Cryptography I mean algorithms which could be decrypted, not one-way ...
5
votes
1answer
11k views

Why so long to break 128-bit encryption?

I read that 128-bit encryption takes millions of years to break. But if I encrypt a file using say winzip that uses 128-bit encryption but the password I use is only one character long (for example ...
5
votes
1answer
322 views

BitLocker Password Change

My team at work was recently working on encrypting some hard drives using Microsoft's BitLocker on Windows 7 hosts. The initial encryption for the 2TB drives took several hours to complete. This is ...
0
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2answers
94 views

mac adress encryption

I am a student of information technology and I am doing a project on avoiding MAC spoofing by using MAC encryption. My goal is to encrypt the MAC address inside the packet and send that packet to the ...
2
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1answer
135 views

How effective is Opera Mini's encryption? Can it hide activity on a WiFi network?

I'm curious since I discovered the nature of how browsing works in Opera Mini. A URL request is sent to Opera's servers, they download the page then compress it to lower bandwidth. They use a file ...
-1
votes
1answer
121 views

Is there a benefit to encrypting a file multiple times? [duplicate]

If I had to store a text file with some confidential information on the cloud, would encrypting the file multiple times (say, 3) with different passwords using WinRAR (AES with a 256 bit key) provide ...
13
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3answers
5k views

Can Cryptolocker (Or Other Ransomware) Encrypt Files That Are Already Encrypted?

If you have already encrypted files, are they still vulnerable to being encrypted a second time by a program like Cryptolocker, or would this protect them?
0
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1answer
82 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
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3answers
139 views

Basic simple encryption with already installed tools

If you are exchanged email messages with people using Linux, Windows and some odd Mac and want to implement some really basic security, encrypting all messages, just trying to avoid some ...
1
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3answers
146 views

Encrypting a huffman encoded file

I wrote a huffman encoding program that can compress and decompress files. The file contains a header which contains information that allows me to retrieve the huffman tree. I wanted to add a simple ...
-2
votes
1answer
496 views

Is AES more secure than Rijndael? [closed]

Which algorithm is generally considered to be more secure, and is AES-192/AES-256 still considered to be secure? After reading this it's lead me to belive that the Rijndael algorithm would be a more ...
-2
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2answers
133 views

Is this adaptation of using a One Time Pad safe?

For example, lets say there are two people named, Bob, and Jim. Bob wants to send Jim a long secret message, and he decides to use a OTP to encrypt his message. Both Bob and Jim know a secret ...
4
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1answer
123 views

Car Remote App Security

Car manufactures like BMW, Audi or Mercedes-Benz all provide mobile applications to control your car. All apps share really critical functions like remote lock/unlock or the ability to find your car ...
2
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1answer
134 views

Is it possible to design a system where the client doesn't have to trust the server?

When you are using services like chat, file sending, exchanging etc., you always have to trust server providing these services. The only way to use services without having to trust third party is to ...
-3
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1answer
37 views

Which encryption technique should be used for users name and passwords in my notebook [duplicate]

i writing all my passwords and users names on my notebook emails,amazons,facebook. and i have really Nosy little's brothers that will probably look at my notebook when i am not around, which ...
1
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2answers
189 views

Which encryption technique should be used for cloud computing data transfer?

I want to setup my application for cloud computing for Software as a Service. There is going to be a lot of data transfer between my server and client, to and fro. The technique I have envisaged is: ...
7
votes
1answer
264 views

Collision attacks on OCB?

I've been looking into the OCB cipher mode and everything I hear sounds good. I was planning on implementing it. Everything except for this lone voice, that is: Collision attacks on OCB: We ...
14
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3answers
6k views

Are phone calls on a GSM network encrypted?

When I make a call on my cellphone (on a GSM network), is it encrypted?
6
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1answer
241 views

How could a system be zero-knowledge?

I'm actually interested about zero-knowledge storage system. Those system where the storage provider claims he can't have any access to the data stored. As far I know, the data are encrypted using a ...
16
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8answers
6k views

Is TrueCrypt safe enough to store clear-text-passwords?

The reason: I want to be able to use a portable USB drive to access my passwords on any machine and OS. TrueCrypt seems to be the only program that has sufficient support on all major platforms. So I ...
0
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1answer
42 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? ...
49
votes
6answers
15k views

Can my IT department read my Google Hangouts chats while at work?

Is Google hangouts encrypted? Would my work's IT guys be able see pictures and text I send while on a work computer? Yes I know I shouldn't be sending stuff I don't want them to see while at work, but ...
2
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1answer
101 views

How does Mylar ensure encrypted data remains secure even if the live app code is compromised

Because Mylar does the decryption in the browser, the key is never stored on the server. Nice. This moves the threat to the browser, where, if the attacker is able to get a malicious script to be ...
2
votes
2answers
165 views

How can I secure the secret key?

I am a bit confused about securing the secret encyption key. Here is the scenario: I need to encrypt some data (file) This data will be read by a program (say written in C/C++). Both the program ...
0
votes
1answer
65 views

encrypted lookup-keys for key-value store

I'd like to use a key-value store (cassandra, redis, ...), but I don't trust the server. The clients have a shared secret, and I'm using that to encrypt the stored values. But what is the proper way ...
2
votes
2answers
331 views

Using a TPM with Linux

I have the need for a company laptop (Dell e6540) that contains our java application on it to go out for evaluation purposes. For this reason I would like to make sure that the HDD is protected from ...
15
votes
4answers
2k views

In what ways does Full or Partial Homomorphic Encryption benefit the cloud?

Can someone explain, in plain English, the practical ways FHE and PHE can be leveraged in the cloud? Some interesting (and confusing) links include this Microsoft Research PDF and this wiki entry. ...
1
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1answer
35 views

updatedb and encrypted home folders: Does it store unencrypted file and folder names somewhere?

When you encrypt your home folder in Ubuntu and Debian, it protects not only the file contents but also the file and folder names. Yet I see that updatedb and locate works in Debian. When I run ...
0
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0answers
32 views

Possible CPA or CCA attack when using AES-CBC mode under the following situation?

Both client and server know a shared key in advance. Both sides us EVP_BytesToKey() derive a pair of same key and same IV. Then, client and server start transferring data encrypted by AES-CBC mode ...
-1
votes
1answer
146 views

PCI compliant transparent data encryption at disk/folder level on Windows?

Is there a way to achieve PCI compliant data encryption at disk/folder level in Windows in a way that is transparent to applications(they must be able to write/read to encrypted folders/disks as if ...
1
vote
3answers
416 views

Protect database data from everyone, including sys admins, etc

One of the things that has always bothered me about simple database data encryption: If the server is compromised, the database is effectively compromised. The attacker can use the same code as the ...
2
votes
2answers
311 views

Easiest solution for automatic encryption of files on Dropbox?

I don't trust Dropbox to keep my files secure. In fact, the same goes for all the other file clouds. What I'd like is a easy and cross platform means of encrypting files that I add and read from ...
2
votes
2answers
132 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
1answer
68 views

Encrypting folders with flash drive key?

Is there any way to have a flash drive encrypted and it will only open with one computer that has the key in it?
13
votes
5answers
2k views

Securing a laptop against attacks (article)

I came across this article when looking for ways of hardening my laptop, and this guide seemed extremely thorough. It is perhaps overly paranoid, but it will be good to have a guide I can trust should ...
2
votes
1answer
270 views

Are there HIPAA requirements to encrypt our database hosted in AWS

I'm developing Medical Billing & EHR Software. On completion we are planning to use AWS for hosting and thus provide SAAS. Do we need to encrypt the MySQL database in order to keep HIPAA ...
0
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1answer
369 views

How are TLSv1.0 ciphers negotiated as TLSv1.2?

I'm a little confused about something I am reading in Bulletproof SSL. "TLS 1.2 is the only protocol that allows suites to define their PRFs. This means that for the suites defined before TLS 1.2 ...