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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Synchronizing secret codes on two different devices? [duplicate]

I was reading an article about how keyless entry systems for automobiles prevent people from recoding the signal and replaying it to open someone's car. In the article they describe the process as ...
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1answer
26 views

Encrypting files securely using user supplied password

I'm currently trying to build a (sort of) secure, desktop based RTF text editor written for node-webkit using node.js. Based on some answers that I read here, such as How can I securely convert a ...
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1answer
14 views

DNS leaks using tor with instant messanger [on hold]

What does it mean for me? When i use Jabber with tor will my ISP see to which jabber server i am connecting ? In that case only DNS crypt would help or VPN, right? I got the impression using DNS ...
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0answers
24 views

Assignment on two factor key authentication in cloud system [on hold]

I am doing a assignment on two factor key authentication in cloud system. but I could not find any white papers related to this. Its grateful if you can provide some notes or sources related to this ...
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1answer
95 views

Encrypted quiz data in PHP and JS

I'm developing a quiz with which you can win a few cool prizes. Therefore I'm afraid, that someone might try to hack/manipulate it. All participants have to be logged in and the website takes 15 ...
2
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2answers
91 views

High level design for secure web application

I'm looking for some advise on designing a secure web app for storing passwords. Why reinvent the wheel? Because I don't trust a 3rd party with all of my passwords. Here are my thoughts: There are ...
2
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1answer
29 views

poodle attack/padding oracle attack

According to wikipedia or https://www.us-cert.gov/ncas/alerts/TA14-290A this is an issue with the SSL v3.0 non deterministic padding used in CBC. Is AES in CBC mode itself is un-secure or it is an ...
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2answers
67 views

Storing lots of passwords that different levels of employees need access to

I am wondering what other people do for storing passwords. Our current model at my employer is fundamentally flawed in my opinion, so I am trying to see what other people do so I can select the best ...
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1answer
40 views

PGP Key publishing on MIT PGP Public Key Server [duplicate]

I have a public pgp key, so that users can send me an encrypted message. Ofcourse, any user that wants to send me a message, wants to verify that the public key (s)he has, really belongs to me. From ...
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1answer
65 views

Two-factor encryption model [on hold]

Please some on help me to understand this "Are you ready for this? With the two-factor encryption model your data is protected two-fold. First, a unique key is generated, encrypted, and turned into ...
0
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0answers
19 views

Android FIPS capable project [on hold]

I want to create an Android FIPS Capable app (140-2 level 1). In the app I use network communications (Android SDK, HttpClient), encryption (bouncy-castle) and GCM (GooglePlayServices). How can I do ...
0
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0answers
31 views

I forgot my ZIP file password. How do I bypass the encryption? Which software would work? [duplicate]

Should I use brute-force attacks? Do they even work? What options do I have? I only remember short fragments of the password and it's definitely more than 7 characters long.
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3answers
1k views

Store password locally. Where? How to pass it securely?

I'm developing an application. The user must enter his credentials which will be sent to the server. If the user opens the application a second time he shouldn't need to enter them again - credentials ...
6
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4answers
165 views

How to communicate securely

What is the proper way for two parties, say A and B, to communicate securely where: Communication between A and B must be secure so that only they know the content of the communication. A isn't ...
0
votes
1answer
62 views

Is it safe to store encrypted volumes on cloud syncing services?

A recent discussion on another website prompted a proclamation that storing (TrueCrypt, LUKS, DMG, etc) on cloud sync services like Dropbox is unsafe, since a version history is kept of each file, and ...
0
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3answers
198 views

How to trace the owner of a computer by mac address

I was given the mac address of a computer that was on my wifi . It was not my computer. There were 2 computers, mine plugged to the modem and a 2nd computer with different mac address than mine. So I ...
0
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1answer
34 views

Looking for a way to encrypt/decrypt data using a generated key that works in Windows and Linux

I am looking for a way to encrypt/decrypt data on windows and linux platforms. The data gets encrypted in windows and the same data needs to be decrypted on linux/windows and vice versa. I understand ...
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votes
1answer
47 views

Is it really worth to spend time on Telegram Crypto Contest? [closed]

Telegram is running this crypto contents. But what I heard from some people on the web is that they designed the contest in such a way that they made it practically impossible to crack. Is it really ...
1
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1answer
64 views

Is it safe to combine AES with TLS?

Given that two clients want to sync data through a server, is it safe to use AES to encrypt the data and TLS to communicate with the server? Assumptions: Server has never access to unencrypted data ...
0
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2answers
156 views

Is an >=2048bit key with Asymmetric encryption secure enough to negotiate a Symmetric encryption key?

Let's say that a client app already knows the public key of the server to which it needs to communicate with and the client app needs to connect to the server using a normal non-secured internet ...
0
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1answer
31 views

Encryption and unique id [closed]

Why not encrypt all confidential, sensitive and borderline data? Why not use a fingerprint ID system as the private encryption key? Why not use a fingerprint and/or other unique identifier such as ...
0
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0answers
26 views

How to find type of encryption used by Mobile Operator? [closed]

How can I find out the type of encryption used by a mobile operator? E.g: A5/1, A5/2, etc.?
4
votes
4answers
597 views

Effects Of Encryption On Computer Systems

I am currently writing an essay and one part is a discussion about the effects of encryption on an Operating System/Computer/Infrastructure in general. However, I am struggling to see how a computer ...
3
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1answer
120 views

In depth TOR encryption design details

I am currently struggling with understanding the details of a connection in tor, mainly because I try to understand PCTCP. In this paper the authors claim that the changes are local to the onion ...
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0answers
23 views

Has Stackfield been security audited and is the metadata safe?

It appears that Stackfield is one of the only functioning applications that combines end to end encryption, messaging services and file sharing. Peerio has just been launched (literally a day or two ...
6
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3answers
690 views

How to encrypt all existing customer passwords [closed]

I work for an online shop and since I worked here we have stored customer passwords in plaintext. I joined the company as a data inputter and when I discovered that we did this I flagged it up with ...
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0answers
39 views

For use with RC4 how do I combine a reused key and an initialization vector

I am an a-level student writing an encryption program using an rc4 implementation I have written myself. I have the basic algorithm coded correctly (and I have checked that some ciphertext for a given ...
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0answers
44 views

Hashcat, finding out the Hash

I've been searching but I can't seem to find the much information on how to extract hash's from say PDF files or Lotus Notes files that I can then use in Hashcat? I know how to get them for Office ...
31
votes
3answers
3k views

What is the best home wireless network encryption algorithm to use?

What is the best home wireless network encryption algorithm to use? I realize the best answer will probably change over time, and hopefully people can provide updated answers as new standards come ...
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0answers
33 views

How to securely store application data on mobile device

How can security be enhanced to the maximum in a messaging app storing messaging history on the device (like whatsapp)? I am specifically referring to methods to minimize the risk of the data being ...
2
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0answers
93 views

Has the POODLE SSL vulnerability ever actually been used?

Is there any evidence that the the POODLE SSL or TLS has actually been proven to be a risk for file transfer like SecureFTP etc...? ...or is it just a theoretical exposure?
22
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4answers
3k views

How do I verify that WhatsApp is using end-to-end encryption?

Slightly old news: Whatsapp Just Switched on End-to-End Encryption for Hundreds of Millions of Users Is there any test that I can perform to verify that WhatsApp is indeed using end-to-end encryption ...
5
votes
2answers
470 views

Security of Linux Full Disk Encryption (Ubuntu / Mint) -insecure?

I'm wondering, why is Ubuntu and Mint using SHA1 for Full Disk Encryption? I heard several times that SHA1 shouldn't be used anymore because it is weak and it could be cracked. Could you guys ...
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1answer
84 views

Microsoft Bitlocker - Using my own encryption/decryption key

Is it possible for me to use my own encryption or decryption key and update it whenever is possible?
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0answers
41 views

Verify the security, encryption of VPN

We build the network as below The VPN server was built on CentOS and two PCs use windows 7. All three were built on VMWares. We want to check the encryption of the data so we use Wireshark to ...
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2answers
146 views

Overkill or appropriate?

I have come across a web application that a company has asked me to rebuild. After all the implementation is said and done I will deploy on a private server, and the database will be on its own ...
1
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1answer
43 views

How do you practically manage your never-use-personal-accounts-on-a-work-machine-ever double life, when your personal machine is a limited iOS device? [closed]

This is follow-up to Starting a new job after working at home for years. How to best protect data, secrets, and privacy in the workplace? The answer to that question is Follow company security ...
0
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2answers
67 views

Is it possible to run an encrypted java environment?

I've seen that virtual machines in virtualbox or VMware can be encrypted so that no one on the outside can access the disk, ram or CPU cache since the entire hardware is emulated and encrypted too. ...
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1answer
24 views

How does a keyfile work?

I was looking at some code on codereview that is far out of my league of understanding and just screwing around, but it raised a question. This program (along with many other encryption programs, i ...
0
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1answer
70 views

Starting a new job after working at home for years. How to best protect data, secrets, and privacy in the workplace?

I have just started interviewing for new computer job after years of working from home. At home I feel very secure with how I protect myself from data loss and keeping my secrets secure. I backup ...
2
votes
1answer
27 views

PBKDF2 strong salt for client-side hashing

What should I use as a secure/strong salt for PBKDF2 hashing when salt is not available to use before login as it will be client-side javascript to hash user+pass with PBKDF2 ? I'm going to use ...
0
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0answers
8 views

S/MIME for Mac and iOS [migrated]

I have been trying to generate S/MIME certificates for my MacOS and iOS devices and it does not seem to work. I have researched on this matter and it seems that keyUsage and extendedKeyUsage are ...
2
votes
1answer
29 views

Is it feasible to create a new key for symmetric encryption for each message rather than negotiating a long lives session?

The normal method of providing an encrypted channel appears to be negotiating a session key (using Diffie Hellman or similar), then using this key for a long lived session. Even IPSec that is message ...
1
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0answers
13 views

Arduino AES library [migrated]

I am using this Arduino library and this Android library to: Create random string in Arduino Pass it to Android to encrypt with AES and shared secret key Pass back to Arduino to decrypt with AES and ...
3
votes
1answer
44 views

What encryption and signature systems (don't?) allow for plausible deniability of the OP's key being used?

I need to prevent Mallory from blindly matching encryption and signing keys to messages Hypothetical scenario: A user creates a public key An encrypted or signed payload exists. With only public ...
2
votes
0answers
45 views

Deduplication: Encrypting the SHA-256 hash of a file chunk [migrated]

I'm designing a data storage system that should be both able to deduplicate data that share the same encryption key, and be reasonably secure. I know that this kind of encryption quality can be ...
0
votes
1answer
23 views

How to secure sensitive data in application with message queue

Currently we are creating one small service, where we are using some sensitive data from users(not worth zillions but to me it is like password). The idea is that application itself only inserts this ...
0
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2answers
62 views

Type of SSL connection used when visiting google services

I have 2 computers running chrome: a) Win 8 , latest chrome b) Win 7 , latest chrome ~ 1.5 yr old high spec laptop Both display the Certificate Authority as: Google Internet Authority G2 computer ...
2
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0answers
36 views

Should veil framework produce packed and obfuscated binaries which bypass virustotal?

I have been working with the veil framework to test an internal IDS system I have in place. I have used a public malware sample which produces an 8/53 hit score on Virustotal and run it through the ...
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1answer
77 views

Use openssl key to decrypt file in android/java [closed]

I want to decrypt file encrypted in openssl in java. File is encrypted with private key using openssl and on java side i want to decrypt it using public key. The code: public void testRSA() throws ...