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0
votes
1answer
93 views

Best way to encrypt passwords?

I've switched to PHP 7.0 very recently and I was wondering that if password_hash was better than making your own salt and using the crypt function. I have three examples of code and I don't know which ...
0
votes
1answer
29 views

Secure communication between a mobile app and a microcontroller

I have a MCU-based design that essentially controls other hardware and this MCU is controlled through an app. I was hoping someone could help me figure out how to secure this communication between the ...
4
votes
1answer
674 views

Client side authentication through signatures instead of passwords

I want to save some user-generated data with some signature of the user that generated it (let's say that the user has to fill some forms with some data and I want him to sign the written data). The ...
5
votes
2answers
69 views

How to add users to a mapping table?

In the accepted answer to "Encrypting stored data for multiple unique users to access information", @lserni describes a mapping table for users. But among the operations for the table, they didn't ...
-1
votes
1answer
36 views

ASP.NET - Data Encryption & Decryption framework designs

I have the following app scenario where i would need to implement the cell-level encryption. Database - MS SQL Server Web Technology - ASP.net MVC Existing app scenario:- Currently the web ...
0
votes
2answers
60 views

How can I effectively design password authentication for encryption in my project?

I'm working on a small personal project that involves a user entering a password that would then allow them to view a text file that would otherwise be encrypted. I'm having trouble wrapping my head ...
1
vote
2answers
108 views

Best ways for startups to handle sensitive user information [closed]

Many companies struggle with even basic sensitive information handling. One screaming example I can give is the attack on TalkTalk's servers resulted as 4 millions customer's personal information ...
4
votes
2answers
175 views

Store encrypted data in XML

Context I work in the energy domain with devices that send data in clear text over some medium, that finally ends on a computer. The data is there decoded and stored in XML files. A current XML file ...
2
votes
1answer
83 views

How to encrypt communication without hard coding key in client?

I've found description of vulnerability here. The kankun smart socket device and the mobile app use a hardcoded AES 256 bit key to encrypt the commands and responses between the device and the app....
2
votes
3answers
2k views

Options for client-side encryption of local web databases

My scenario is as follows: Web application, run from the browser, designed for mobile devices. Uses WebSQL storage which may contain sensitive data. Uses Application Cache to enable offline use ...
43
votes
13answers
8k views

Encrypted content in games

I have been having this idea of using encryption to prevent users from figuring out content in my program outside of the program itself. Like users may find textures never used in the game meant to be ...
10
votes
7answers
12k views

Should I encrypt data in database?

I have a client, for which I'm going to do an Web application about patient care, managing patients, consults, history, calendars, everything about that basically. The problem is that this is ...
2
votes
0answers
68 views

Windows Phone 8.1 & above - is there some equivalent for Apple's keychain

I want to store store some app specific secret on the phone - this should be available only for the app & no other app. I was looking at DPAPI - however, if the user does not have a logon ...
12
votes
2answers
2k views

How can I get my own encryption algorithm tested?

I've just developed a block cipher symmetric-key algorithm and I am using it in some of my products. I want to put it to real test. How would one go about entering their encryption algorithm into an ...
0
votes
1answer
124 views

Strategy for Public / Private API, Encrypted (or Hashed) Data, and Server Compromise

In this very simplistic but realistic scenario, I have 2 combo web/database servers (A) behind a load balancer and a single IP address. They also permit access only from one IP address -- the client (...
1
vote
1answer
64 views

MS SQL Server Cell level Encryption options

Recently, i got the task of doing some research into the data encryption at the cell level. I tried using the Symmetric key (by passphrase) & second option i took is Symmetric key (by Certificate)....
0
votes
0answers
65 views

Web service security token storage

I have two operations in my JAX-WS web service: First takes username and password as parameters and generates random alphanumeric token, second takes this token and username as parameters, verifies ...
0
votes
0answers
33 views

Client application and secure data exchange without ssl/tls

I have my own home server and port 80/443 is blocked from my ISP provider. I want to create a Qt gui application that saves my data on my server using REST (using port 8080 or something) using nginx/...
0
votes
1answer
77 views

Where should I put my key? [duplicate]

I have a Private Key that is regularly used to decode incoming files during off-business hours as part of an automated process. Currently, it is stored in the application code itself, and only ever ...
2
votes
2answers
653 views

matching usernames with their password

We are working on a simple login/registration form. Our login script checks to see if the username and password exist in the same row of the database. If it does exist, we bring the user to a welcome ...
1
vote
2answers
682 views

PHP Source Code Encryption Concept

Scenario: I'm looking to protect my software that is written in PHP. The nature of PHP is that it is delivered as plain text and therefore cannot be protected by itself. I don't want to install libs ...
0
votes
5answers
258 views

How to handle the problem of modified encrypted files [closed]

I have a simple encryption/decryption application that I am testing to learn more about security. I found out that if the user modifies the encrypted file, then decryption fails because the hashing ...
1
vote
1answer
34 views

How to sign a document in LAMP environment?

I'm working on a LAMP environment (Linux-Apache-MySQL-PHP) and I need to sign documents (PDF, but maybe in a future, I'll use other formats so I'm interested in a general answer). These documents are ...
3
votes
1answer
313 views

Decrypt data on any Windows computer by same user

I have a license system which currently locks licenses to a physical computer using CryptProtectData (with CRYPTPROTECT_LOCAL_MACHINE) and CryptUnprotectData. This is of course not the entire license ...
2
votes
3answers
194 views

Where to store hashes, salts, keys in Desktop Applications

I am trying to figure out where or how i should store application secrets and keys inside a desktop application. For example a facebook app key or dropbox key and secret. So I've read that i should ...
0
votes
1answer
125 views

Is using digital signatures and bytecode machines a viable technique to make reverse engineering hard? [duplicate]

If I have a private key with which I sign byte code, and a public key with which I can decipher the signed code to verify its authenticity, can I protect that byte code from being reverse engineered ...
3
votes
2answers
346 views

Encrypting stored data for multiple unique users to access information

Developing a database for many users, and thousands more "people" in the database, one section requires we encrypt the personal data - Youth's information, medical information, etc. We have users who ...
2
votes
1answer
330 views

How can I encrypt or remove readability of source code before publishing it?

I am working on a collaborative project, for which I have to submit source code, which will be used/embedded in the main repository for re-compilation. Is there any way, I can encrypt the source code ...
29
votes
7answers
4k views

Is there any algorithm pattern to protect any content in the web to ensure I am the first one who created it?

A few years ago there was this hacker (don't remember who he was) that full disclosed a vulnerability in a given system, but to make sure nobody took credit for that, he created some kind of PGP key. ...
1
vote
1answer
171 views

How to protect an AES encryption key in shrinkwrapped software

If I want to do file encryption in a desktop piece of software I'm assuming I'll have to hardcode an encryption key in my compiled code. Is that assumption correct and if so what precautions can I ...
3
votes
4answers
3k views

How to implement simple secure client side encryption

I know these sorts of questions come up, but I couldn't find a simple answer, most of the answers are "don't do that" For play, I built myself a webapp, it uses sjcl to encrypt and decrypt notes on ...
-1
votes
1answer
112 views

Looking for encryption method [closed]

I have a blackbox system whose code is hidden from the end user. That's the intent anyway, I know some may break into it, but generally it's closed. It's running on PHP, and I need to export a ...
0
votes
2answers
330 views

Snapchat clone: How do I secure pre-downloaded notifications so that they cannot be opened outside of the app?

Say I'm making a snapchat clone app for Android and iOS. Let's say that I get a snapchat from Baz. I want to pre-download the audio for this snapchat. However, as the developer, I want to secure this ...
1
vote
1answer
1k views

Polymorphic engines in C and/or C++ [closed]

I stumbled across polymorphic engines and I don't know anything about them. However, I am curious about how they are written. Every example that I've looked up writes them in assembly, my assembly is ...
4
votes
5answers
1k views

Paranoid Encryption

Call me paranoid, but I really like to keep my stuff secret, but readily available on the cloud. So, asking this question. How safe and reliable is encryption software (e.g., truecrypt)? The reason ...
0
votes
1answer
2k views

VB.NET - Serial Key Generating (Encryption, Hashing, Encoding?) Algorithm

I am trying to create a basic licensing system where I take a unique ID from the client computer, and I get this Hexadecimal string (hyphens removed e.g. "84-18-CE-...."): "...
3
votes
4answers
120 views

Can I save & store a user's submission in a way that proves that the data has not been altered, and that the timestamp is accurate?

There are many situations where the validity of the timestamp attached to a certain post (submission of information) might be invaluable for the post owner's legal usage. I'm not looking for a service ...
23
votes
4answers
4k views

Is this simple XOR encrypted communication absolutely secure?

Say Alice and Peter each have a 4GB USB flash memory stick. They meet and save on both sticks two files named alice_to_peter.key (2GB) and peter_to_alice.key (2GB) which contain randomly generated ...
0
votes
1answer
198 views

Browser security and payments

I've been finding a lot of blog posts claiming JS encryption is unsafe, here's a couple of detailed ones: http://www.matasano.com/articles/javascript-cryptography/ http://rdist.root.org/2010/11/29/...
0
votes
1answer
83 views

Encyption for passwords in config file? [closed]

I was wondering, if it makes sense to encrypt passwords for external services stored in my config file with an symmetric encryption algorithm? On the one hand I think, if someone gets access to the ...
77
votes
15answers
25k views

Why should passwords be encrypted if they are being stored in a secure database?

I have a web service. Right now, I have passwords stored in plain text in a MySQL table on my server. I know this isn't the best practice, and that is why I am working on it. Why should passwords be ...
0
votes
2answers
423 views

Encrypt and decrypt password for a specific application

I have a basic web application where users can login and edit their profile. In the profile they can submit an username and a password for a different application. I'd like to take that password and ...
4
votes
3answers
439 views

Login into application at startup

Short version: I want "Login on program startup" checkbox like in Skype, for example, but don't know how to protect saved credentials securely. I'm writing client application which, before doing ...
1
vote
3answers
682 views

Security through obscurity and storing unencrypted passwords

What exactly does "Security through obscurity" means in the context of stroing unencrypted passwords? I'm using a small program (I won't name it, to not enlarge enough large shame on its author) that ...
4
votes
5answers
5k views

Building a web app with encrypted MySQL database entries?

I have some experience in building PHP based websites with MySQL access, storing encrypted user details, but all other fields being plain text. My most recent project will require sensitive data to be ...
1
vote
2answers
134 views

Could someone help me understand SQL TDE Database encryption?

I don't quite follow how it works. According to the MSDN Article there is a big hierarchy of keys protecting other keys and passwords. At some point the database is encrypted. You query the database ...
5
votes
3answers
9k views

How do I encrypt the source code on the webserver?

I have a web application developed using Python, HTML, CSS & JavaScript. The customer installs it in any of their own Machine and uses it through their LAN. In short the customer sets up the ...
0
votes
2answers
292 views

Safest way (i.e. HTTPS, POST, PGP) to send decryption keys through the web?

I am in the final stages of development for my Revit plugin. This plugin is programmed in C#, and distributed via a DLL. One of the DLLs is an encrypted SQLite database (with proprietary data) that is ...
8
votes
2answers
298 views

Data encryption/protection - where to find info about high-level best practices [closed]

I feel that no one in the group I work in, myself included, really groks encryption and security, or the reasons behind making certain decisions. For example, we recently had a conversation regarding ...
28
votes
4answers
896 views

Zero-knowledge code hosting? [closed]

In light of recent revelations about widespread government monitoring of data stored by online service providers, zero-knowledge services are all the rage now. A zero-knowledge service is one where ...