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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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. ...
6
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3answers
740 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 ...
31
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3answers
4k 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 ...
0
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0answers
25 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 ...
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0answers
44 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 ...
2
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1answer
112 views

Is an anonymity network like Tor viable on top of the GPG web of trust?

The web of trust is a graph where the vertices are GPG users (actually, their keys) and the edges are cross-signatures. If we put issues of owner trust aside and assume that all participants only sign ...
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2answers
2k views

Encrypted code file (.vbs) hide all my files and shows .lnk files

I am using Windows XP Professional and what happens is that when I try to connect any gadget like a pen drive or a mobile through USB, all my data got hidden and it shows a 1 kb file which is a .lnk ...
5
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2answers
539 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 ...
2
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0answers
57 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 ...
7
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8answers
17k views

Is Windows BitLocker secure?

Naturally I feel that I have to ask this question, since it's a built-in feature in Windows. Let's say someone has physical access to my PC, is there an easy way for them to access a BitLocker ...
2
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0answers
102 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?
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0answers
666 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 ...
1
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2answers
109 views

What is the common practice to encrypt user's personal identifiable information

I am trying to protect the data by using AES to encrypt all PII data before it is saved to database, and I think the general mechanism is something like below. (This is what I think, not necessary ...
1
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2answers
158 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
110 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?
2
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3answers
127 views

If a phone is encrypted at a platform storage level do I need to encrypt my data stored on it?

I am writing a mobile app which would be expected to store sensitive data. It needs to be stored for offline use. I am wondering now that Android and iOS provide encryption at rest do I need to ...
1
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1answer
52 views

Necessary components for PGP [closed]

I came across this question during an interview. I was asked: What are the two main components of PGP encryption necessary for it to work? I was thinking in line of Private and Public Keys but I am ...
1
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1answer
47 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 ...
36
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6answers
3k views

Pattern to allow multiple persons to decrypt a document, without sharing the encryption key?

Current setup We have a service that allows users to upload documents through a website and stores the uploaded documents encrypted on disk. The documents on disk are encrypted with a per-user key, ...
4
votes
2answers
138 views

A method for securely sharing centrally-stored documents among a changing set of users?

I believe it's possible to meet these requirements only if a third party is involved in a manual process. For example: Each user is given the same public key The private key resides offline at a ...
0
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1answer
80 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
42 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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1answer
30 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 ...
4
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3answers
360 views

What is the security value of this on-the-fly SRP user registration?

I am currently implementing SRP on a game I am developing. However, I will be distributing this game server and client, so I would like registration to be allowable on-the-fly, without requiring the ...
32
votes
3answers
30k views

Is 7-Zip's AES encryption just as secure as TrueCrypt's version?

The main difference being TrueCrypt creates containers and 7-Zip encrypts the file itself, so file sizes can be guessed. Now let's just talk about the strength and breakability of the encryption. ...
2
votes
1answer
31 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 ...
3
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1answer
51 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 ...
4
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2answers
2k views

Symmetric or asymmetric encryption for JSON Web Token?

We're planning on using JSON Web Tokens (JWT) for our authentication server, and I am currently evaluating which encryption approach to take for the JWE token. There appear to be two options for ...
0
votes
1answer
31 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 ...
5
votes
2answers
366 views

Tor versus direct monitoring

I know if I use Tor and maybe made a tweet, it gives the government a really tough time tracing the originator. But what if like a police car was directly outside my home for instance. Is it still ...
0
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2answers
67 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
50 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 ...
-1
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1answer
148 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 ...
2
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1answer
81 views

Is it safer to use a PGP key encrypted with a password than just the same password separately?

I'd like to encrypt some master passwords that I want to store with added security outside of KeePass, instead as just a normal record in the database. I was considering storing these passwords in an ...
2
votes
4answers
151 views

Is it possible to communicate securely entirely over the internet given a global, resourceful man in the middle?

Assuming a global, resourceful man in the middle, is it possible to Securely communicate (I don't mean storing encrypted data off site) completely establishing and sending messages over the internet ...
24
votes
3answers
6k views

symmetric encryption session keys in SSL/TLS

This question concerns the session send and receive keys used in SSL/TLS protocol. my understanding is that this key uses symmetric encryption (DES, AES, BlowFish, etc.) I'm wondering, if ...
1
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0answers
39 views

Software to use for encrypting data in PHP [closed]

I'm interested in programming and information security, I would like to combine both my interests to build sort of password manager. This would be how the user would interact with the site: Alice ...
2
votes
2answers
199 views

How easy is it to crack gpg with private key, but without password

I was wondering if an adversary have your private gpg key but not the password/phrase, how easy/difficult would it be to crack a encrypted file compared to a encryption that only use password and not ...
2
votes
2answers
311 views

PGP as method of sharing AES key?

Would PGP work as a method of sharing the AES key, as shown below, and what would be the flaws with this method of encryption? Server sends PGP public key Client generates (uses as AES key for ...
8
votes
3answers
757 views

Does the SSL encryption strength or validation level of a website really matter?

When looking to get an SSL certificate one is presented with a lot of options. For example lets take Network Solutions since they have a nice comparison chart. Immediately there seems to be 4 major ...
1
vote
6answers
1k views

Is SHA-1 encryption?

I have read that SHA-1 is a cryptographic hash function. On an exam, SHA-1 was given as a possible one-way encryption algorithm. Does SHA-1 require a key as input? Is a key required to qualify as ...
0
votes
1answer
78 views

Hiding existing windows 7 and loading decoy windows 7 instead [closed]

I have windows 7 64bit installed on my computer (NTFS). I wish to hide this installation and create a "decoy" windows 7: When the computer boots up, it will boot to this new "decoy" win 7. If, on the ...
15
votes
0answers
730 views

Understanding HTTPS: why use both symmetric and asymmetric key cryptography? [duplicate]

As a Web Developer I recently realised my understanding of HTTPS is poor and am currently endeavouring to better understand it. After some initial reading I'm left a bit puzzled as to why initially ...
0
votes
1answer
92 views

How to store passwords to a remote web site?

Say I want to build a public API to access a website that doesn't have one. The website is protected by a standard username/password scheme and the API implementation will use scraping to get the data ...
6
votes
4answers
158 views

does using a long delimiter multiple times degrade encryption security?

I need to condense multiple distinct pieces of data into a single encrypted string that can be decrypted and separated out later. Before encrypting, I need to separate the data with some kind of ...
1
vote
2answers
49 views

Is it secure to split information into multiple packets?

I just stumbled upon this SO question. I was wondering if it would be still secure to split the encrypted packet into multiple packets, which are then transferred over the wire separately. Could ...
3
votes
3answers
644 views

Why have export controls for cryptography?

I've always heard someone justify the means for export restrictions with "it's for governmental control/spying". In most reasonable countries, the justice system asks people to adhere to the "spirit ...
23
votes
6answers
3k views

What real world benefits does PGP have over sending email with SSL/TLS such as with HTTPS?

I've been learning about PGP, and I asked myself, "Why?" For example, if I'm using https://mail.google.com, then what benefit would adding PGP offer that would justify it being used? I can ...
2
votes
1answer
133 views

Arduino to Android secure bluetooth connection

I'm using an Arduino Uno and a nRF8001 board from Adafruit to connect to an Android phone over bluetooth. I will be using it to lock and unlock a lock and I need to make sure only verified devices are ...
1
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1answer
123 views

All users can write only one can read system

The system I want to implement has the following requirement: All users can insert some sensitive data, but only one, master user, can see it. There is any known, already implemented solution to this ...