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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3answers
72 views

Can HTTPS or VPN connection be sniffed through UTM device?

Someone told me that if my device communicates with a server on Internet via VPN connection or HTTPS, all the contents that I have sent can be sniffed and decrypted by the UTM device (or more ...
0
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3answers
212 views

How could i totally secure a connection between two nodes?

I've posted this question on stack overflow a bit earlier and lazy functor redirected me here. Thank you ! I'm building an authentication server in python and was wondering about how i could secure ...
10
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1answer
747 views

TextSecure protocol

Is anyone aware of an analysis of the TextSecure protocol? https://whispersystems.org/blog/simplifying-otr-deniability/ https://github.com/WhisperSystems/TextSecure/wiki/Protocol It is a ...
4
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1answer
356 views

How to implement client side encryption for CalDav & CardDav content?

I'm looking for a client-side encryption implementation that would be able to secure CardDav & CalDav data so that they couldn't be compromised even by the hosting provider. Server side: PHP or ...
2
votes
1answer
95 views

Encrypt Android app data and send to web service

I want to develop an Android app that may contain sensitive personally identifying information (national ID number, phone number, etc.) among other data that will be stored in an Android phone. Let's ...
2
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1answer
201 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 ...
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1answer
41 views

Storing encryption keys on a server using Node.js and MySQL

I am writing a web backend/api for an iOS application using Node.js and MySQL. In my database I have a table for posts. I would like the posts content to be encrypted. Let's say I'm using this AES for ...
1
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1answer
23 views

Save application autostart login token on computer

I need to login desktop application while autostart on server (like skype does). What is the best practice to save authentication token (password)? Should I use something like RSA encryption (which ...
1
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1answer
50 views

Need help designing an encryption workflow

Background: I'm building a .NET application, a very small part of this application allows for users to communicate with a third party application. I am designing this aspect. The third party simply ...
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1answer
55 views

Making a bitcoin-like secure mail protocol, how to tackle public keys?

I'm making a new mail protocol (probably already exists, but I've learnt a lot of things about security and privacy on the way). Here's the summary(much simpler if you know bitcoin's inner workings): ...
1
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1answer
66 views

Why is the read write speed of a Protected DVD so slow?

I got a DVD with copy protection enabled on it, but the problem I am facing is that it loads extremely slow. I have seen such happenings with other kinds of protected DVD's as well. Can anyone tell ...
1
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1answer
74 views

Is a Diffie Hellman Ephemeral key good material for being used as a symmetric cipher algorithm key?

I am designing a secure protocol (for academic/learning purposes) and I am at the point where I need to (re)design the key exchange step. In my previous implementation, I used to rely on RSA to ...
1
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1answer
94 views

Only one entry in No-SQL database needs encrypting

So I have the document format as follows: { id : plaintext, date-created : plaintext, data : binary } The data entry needs encrypting and decrypting. My idea was to have a private key, ...
1
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1answer
109 views

Requiring 2 keys to access a content

I need to use an external service that can only be accessed by password. I don't like the idea of storing the plaintext password on the server, but AFAIK there's not much I can do. Considering this ...
0
votes
1answer
17 views

What is the point to the IPEK in DUKPT?

I'm trying to understand the DUKPT (Derived Unique Key Per Transaction) system used for PIN devices, but I'm getting hung up on the IPEK. This blog post has an image where the sequence is: BDK ...
0
votes
1answer
88 views

I need two separate hidden volumes in disk encryption. What are my options?

C: for system (Windows) D: for my files Makes much more sense to me than packing everything on the same volume, right? Is there a disk encryption utility capable of doing this? I don't know much ...
0
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1answer
138 views

How do I determine S/MIME encryption used?

From what I understand it seems that S/MIME uses PKCS #7 which can handle various different types of encryption. How is the choice of encryption method made by the e-mail client and how do I know what ...
-1
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1answer
347 views

How to encrypt by AES-Twofish-Serpent

I was wondering how to encrypt by doing a AES-Twofish-Serpent encryption. Does this mean I encrypt in AES first then after that in Twofish, and after that in Serpent (three separate encryptions). ...
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1answer
79 views

What are the risks if a weak ciphers are accepted by a technology that uses SSL

The TLSSLed tool found that the host that I use has SSL connection that accepts 8 different TLSv1 and SSLv3 ciphers that are weak by their length (40 bits). How can an attacker exploit this fact?
3
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0answers
118 views

Decrypt Passwords based on using a user's password

I am creating a database to store our client's information at work (a heritage center specializing in DNA based genealogy). Once the results of a test come back, we have people that use the ...
3
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0answers
139 views

Is 'Forge' Javascript crypto library secure?

I need a client-side crypto library. I've seen https://github.com/digitalbazaar/forge linked many times on stackexchange. Forge seems to be the most complete and well-documented crypto library for JS. ...
3
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0answers
414 views

MPPE-Send and Receive key derivation from MS-CHAPv2

I am trying to get the MS-MPPE-Send-key and MS-MPPE-Recv-key from the MS-CHAPv2 challenge material. I am able to follow the RFCs 2548 3078 and 3079 to the step of getting the GetNewKeyFromSHA() it is ...
2
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0answers
67 views

HIPAA compliant blob storage architecture

There is a task to design a system to store sensitive data securely (should be HIPAA compliant in the future). It's just a draft - this will not be used in production in a foreseeable future. I have a ...
2
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0answers
34 views

DNSSEC signing algorithms

Virtualmin supports a flurry of algorithms for DNSSEC: RSASHA1, RSASHA256, RSAMD5, DSA, DH, HMAC-MD5, NSEC3RSASHA1, NSEC3DSA. If I understand correctly, there's Proof of Concept available for SHA1 ...
2
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0answers
51 views

Why doesn't Bitlocker mix the password with stored key?

Bitlocker doesn't support USB key + PIN (password). The reasoning was "the password is too weak to provide additional security". Isn't that flawed? With a USB key and password, I've got some level of ...
2
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0answers
99 views

BSD encryption advantages

If someone who knows about the BSD project has a moment to answer this, I'm wondering a few things about the encryption used. It's more than what I'm finding in the docs and on Wiki/Google (even the ...
2
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0answers
84 views

What is the best way to manage gpg keys across multiple devices?

I have a desktop computer and a laptop computer both running Debian. All of the devices have encrypted hard drives. I also have a phone running Cyanogenmod/Android. What is the best way to manage ...
2
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0answers
56 views

What flexibility does a “Third party gamma” offer to U-Prove deployment?

The U-Prove SDK has the following comment: (link) // 1: CA-RA split (a party trusted by the issuer provides the gamma value) Given that the Gamma value (if provided) overrides the Attributes value, ...
2
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0answers
74 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 ...
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0answers
33 views

What should I do when I need to store passwords for usage in 3rd party softwrae?

I have a desktop WPF application which authenticates with Dynamics CRM 2011. I ask for the username and password of the user and use them to connect to Dynamics CRM 2011 using ...
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0answers
44 views

Storing private messages in a database

I am creating a portal where users can send private messages (PMs) for a very large audience. So I want to encrypt the messages and store them in the database. But I do not want to ask the users for ...
1
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0answers
106 views

An attacker got a few 128bit TrueCrypt keys from a RAM analysis. What can he do?

I'm trying to simulate a possible attack scenario for my studies. I've got a image, which has a encrypted disk, encrypted by TrueCrypt (confirmed). TrueCrypt is installed on the image itself too. ...
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0answers
43 views

P2P sharing of uniquely encrypted files

I need a way to share large, uniquely encrypted files (AES256) that are actually the same file when decrypted, through P2P, to optimize download speeds. For instance, a centralized server would ...
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0answers
39 views

Is it possible to produce incorrect Metadata?

There is an app on xposed installer called XPrivacy for android that let's you decide what information you want your device to give a specific app and for information you don't want to give it ...
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0answers
47 views

Vigenere polyalphabetic cipher

A Vigenere polyalphabetic cipher has a repeated keyword length of k, and encrypts any of 26 letters using a rotation cipher. What is the keyspace of this cipher?
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0answers
73 views

Designing a security and encryption strategy for MongoHQ

I'm trying to design the best strategy to achieve the following goals: Securing data-on-the-wire between my server and MongoHQ. Encrypting all data-at-rest with MongoHQ (possibly key values as ...
1
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0answers
32 views

Message and Key Security

I'm reading Post-Quantum Cryptography, and in the page 106 in the beginning of the Section 3 it says: In this section we consider the message security (opposed to key security) of code-based ...
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0answers
66 views

Is my approach to anonymous certificate based HTTP(s) authentication and secure private messaging sound?

I'm trying to work out a somewhat anonymous secure messaging system, and was hoping someone could validate my overall approach. Keep in mind, this all takes place over HTTPS. Authentication While ...
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0answers
84 views

Bouncy Castle C# API and NTRUEncrypt

I want to play around with NTRUEncrypt and I found this tweet that NTRUE is now part of bouncy castle. But I cannot find any proof of the existence in the source code of teh Bouncy Castle C# API, ...
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0answers
47 views

Putty Event Log

Can anyone explain me the Step by step process of Key Exchange that takes place while accessing Linux machine using Putty ? I found the Event Log of Putty but the Various Key Exchange didn't make very ...
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0answers
46 views

How do time-limited keys work for e.g. DCP files?

According to http://en.wikipedia.org/wiki/Digital_cinema under How Digital Cinema Works it states that the decryption keys are time-limited and expire after the end of the booked time. From a high ...
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0answers
84 views

Is this good management of the Encryption Key

The site is to be hosted on a shared internet server, to store non-commercial data and it will be clearly labelled as not for sensitive information. I wish to offer a credible solution to the risks ...
1
vote
0answers
104 views

Implementing OAuth flow in JavaScript

I am making a custom auth flow for the application. It is inspired by OAuth 2.0. Dev sends user to an auth page on my domain, passing callback_url and api_id. I redirect user to callback_url, passing ...
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0answers
117 views

Routing Protocol Encryption

As far as I know 'newer' versions of routing protocols support authentication between routers. What about encryption and integrity checks? Some implementations like this one from Cisco use MD5, which ...
1
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0answers
103 views

Bitlocker lock drive on standby or switch users

Is possible to auto lock drive with bitlocker when the laptop go on standby or sleep mode? Or when the user is changed? I want the drive to be accesible only by one user.
1
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0answers
98 views

Techniques for web-user communication across an untrusted server

I'm designing a web-based notification framework (i.e. a user can subscribe to updates from a service or another user) where communication between users is encrypted. User-to-user communication on ...
1
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0answers
196 views

Configure Asterisk for lan with SRTP enabled SipDroid

I want to have a secured call over internet between two android phones. I have found SipDroid which is an open source SIP client for Android. And also I have followed this to install Asterisk, Dahdi ...
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0answers
328 views

Decrypt “key” that encrypted with LMK or TMK

Newbie here, new to HSM (Thales payshield 9000), i'm working on DUKPT algorithm, i manage to derive the IPEK(encrypted either under LMK or TMK), but i need to inject a plain text IPEK in to a end ...