Tagged Questions

Details on how data is being kept in memory/on disks, most frequently being applied to databases, media banks and backup-recovery solutions.

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4
votes
1answer
81 views

Is Firefox Password Manager less secure than LastPass?

After installing the LastPass password manager, I am presented with a login dialog including the option to "Disable Insecure Firefox Password Manager". (This option appears as long as the Firefox ...
6
votes
4answers
72 views

Where should a team store server credentials [duplicate]

Imagine we are working in a team of around 5 people. We all install new servers on a monthly base and need to find a better way of storing and sharing the server credentials ...
1
vote
0answers
6 views

Files associated with Thunderbird - Security mechanism for local storage [migrated]

I am trying to know how Thunderbird stores the mails, associated files in the local machine. I use Ubuntu 13.10 and Thunderbird 24.6.0 When I see in the local profile folder in the location in ...
1
vote
1answer
103 views

Secure backup on online Cloudstorage

i own a small private server (@home) with all necessary features for my backup purposes (Owncloud, SVN, GIT). My target now is to ensure the safety of my data in emergency cases like fire/flood. For ...
3
votes
3answers
188 views

Is it ok for software to store passwords locally in plain-text?

There are already plenty of questions about what to do when websites store plain-text passwords. But this one is a little different. I use a piece of open-source (see below) software for playing ...
-2
votes
1answer
78 views

I want to encrypt content on USB or SD Card [closed]

I want to encrypt the content on a USB or SD card that can only be decrypted by an app installed on any device or TV. When the USB is not connected to that particular app, it should not be accessible. ...
1
vote
1answer
19 views

Can I keep large encrypted files in my mailbox on mail provider server?

Is there any restriction or policy of large e-mail providers (such as GMail, Yahoo, Hotmail and similar) for keeping/storing large encrypted files by the users within their disk quota in 3rd party ...
2
votes
2answers
112 views

Password verification scheme (used in eg. MS Office) - more secure than just a hash?

Usual password verification schemes stores a salted password hash and the salt. If the hash is good and computational costly, it is considered secure. However an alternate version (used in Microsoft ...
6
votes
1answer
216 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 ...
4
votes
4answers
252 views

Does Windows have a built-in password store?

What passwords are stored in Microsoft Windows? How can I know what password are saved in computer?
1
vote
1answer
75 views

Can any malware access the OSX keychain data

I'm working on a security project. I have sensitive data that I would like to store in OS X's keychain. I'm able to add the data programmatically into the OS X keychain by using RHKeychain. But after ...
0
votes
2answers
117 views

Store a file on a harddisk without root having access to it

Is there a way to store a file on a disk as a user so that even the root user has no access to it? I tried EncFS but that is no solution because the root user can switch to every user, so he/she can ...
39
votes
8answers
5k views

What are some considerations before moving personal data to Google Drive?

I am considering uploading some (all) of my digital personal data to Google Drive. I guess this would instantly grant access for NSA to my data. (Is that right?) Who would have access to my data on ...
1
vote
4answers
241 views

Storing CVC / CVV / CVV2 until payment is processed

I need to store the payment info of a transaction. We have a script that reads which transactions haven't yet been sent to our ERP (the business management software), to then send it. This script ...
0
votes
2answers
73 views

securely storing password in a file

I am working on making a log file for a small application. If an error occurs in the application then I have to send a mail to a person. I've figured out the code to send a mail to a person, but I ...
1
vote
0answers
43 views

Securing server from attacks and linking while allowing users to upload and store personal files?

I have read some questions and answers about uploading images specifically: Have I done enough not be compromised through image uploading Risks of a php image upload form Uploading images safe of ...
3
votes
3answers
194 views

How can a site know about insecure password?

I received an email from my web host recently that informed me I had an "insecure" password on one of my email accounts and that I had to change it. Their definition of what a secure password is as ...
1
vote
0answers
38 views

Storing Tenants Cloud Keys In a Database

Imagine you are building a public service where you need to store the customer's cloud credentials(like their aws secret and access keys) in your database to regularly use by your backend services in ...
1
vote
1answer
105 views

Hashing password for secure storage (generating salt)

I wanted to check if the following means of generating a hash for storage of a password was secure. I have an username and password combo. In order to generate a secure hash, I am doing the ...
2
votes
1answer
169 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
votes
1answer
64 views

Tools for Verifying Secure Deletion

It is recommended to verify the zeroing-out was done properly when you try to secure delete a HDD. From this post, some drives with firmware bugs prevent secure erase from working properly. What are ...
3
votes
1answer
188 views

Safe ways to store passwords without hashing them

I'm working on an email client for Windows, and to send emails, my application needs to have the email address and the password of that email address. When the user gives his password, I store it ...
5
votes
1answer
253 views

Is the SD card write protection hard-wired or optional?

According to Wikipedia, the SD card reader recognizes if the little tab on the left of the SD card is in the "lock" position or not. Thus, a SD card reader can still write on the SD card even if the ...
0
votes
2answers
253 views

How do you protect strings in code from users decompiling them and seeing them [duplicate]

For an example say we have an application such as a client based application which connects to an API using an api key. We are saying for this purpose there is no OAuth. How would a string or in this ...
2
votes
2answers
184 views

Locality Sensitive Hash (LSH) function to approximately match old passwords

Recently, I ran across a website that requires me to change my password after X number of days had passed since I had last created one. Intelligently, the service made sure that the password did not ...
1
vote
1answer
154 views

Are there any secure ways to store the secret key used in a TOTP scheme?

I'm writing a little webapp that demonstrates 2 factor authentication. I'm using the TOTP protocol as described in RFC 6238. In our scheme, we are storing, in addition to a b-crypted password hash ...
3
votes
2answers
118 views

How can I ensure that Dropbox is using only its folder?

I'm using several cloude storage services, like Dropbox. Each have windows app for its synchronization, and this app actually can read anything from my disc, not just files from its 'synchronized' ...
8
votes
2answers
585 views

Is it really secure to store API keys in environment variables?

This site says it is best to keep API keys in environment variable out of the code. And here Storing Credentials Securely You should take great care to ensure your credentials are stored ...
1
vote
1answer
156 views

What are the implications of storing sensitive data in bookmarklets?

While discussing alternatives for asking the browser to remember your password, one guy suggested using a bookmarklet to store users' credentials. The original answer is in portuguese, but I'll ...
5
votes
2answers
603 views

Encrypt user data when they log in with Facebook, Gmail, etc

I made a login system. The user can login by: using a normal email / password (bcrypted). using a service like facebook, gmail, etc. So far so good. Now I want to store sensitive information (ftp ...
0
votes
3answers
110 views

Best way to store passwords for a LAN tool?

I am making an app in Python for linux as a front end to the router (to automate some tasks). But I need to log in to the router before I can do any operations on it and since it uses a http-auth I ...
1
vote
1answer
111 views

How secure is the web-based file browser that comes with my NAS?

I have a Buffalo Linkstation Pro 2 Duo for home use. It has a web GUI for browsing the contents of the NAS (distinct from the admin interface). The idea is that you would expose the web GUI to the ...
0
votes
3answers
225 views

How to store user credentials like Mint.com [duplicate]

If you have a website that need to store user's credentials for other sites, how do you store those credentials securely? An example is Mint.com where you give them your username/password for your ...
3
votes
2answers
261 views

How secure is the private storage of a mobile app

Are there any know security flaws/hacks to gain access to the private storage(file system or SQLite database) of Android and iOS applications? What measures do Google and Apple take to "prevent" ...
5
votes
2answers
430 views

What SSD maker has implemented Secure Erase to spec?

I have a Kingston hyperx drive circa 2012. I kicked off a secure erase on it. I then remounted the drive and was horrified (well, not really more like bemused) to see my whole parts of my old file ...
0
votes
3answers
229 views

Storing passwords and other data for coworkers

At the moment we are encrypting our server passwords and other important data internal via PGP. Every coworker has got his/her own private key/pass combination set up on their workstation. The problem ...
3
votes
1answer
115 views

Optimise user data fetch using S3

I'm writing a mobile app that communicates with my server using REST. Upon every launch, the app makes a call to the server api to check whether there was a change in the user details (using a ...
4
votes
1answer
136 views

Keeping a user's passwords, but can't hash them

I'm making a web application to provide intermediary service for customers to facilitate their interaction with a set of other web applications. A simplified example would be to let a user access his ...
0
votes
2answers
616 views

How do i know if I have moved or copied a file from my SD card to PC? [closed]

is there any way to know if the file I have on my mini-SD card was moved or copied to my PC? i have sensitive files on my SD card which is stolen and i cant remember if I cut or copied the file from ...
0
votes
2answers
183 views

Is my domain registrar storing my password in cleartext? [closed]

I called my domain registrar (unnamed here but not difficult to find out and a major provider) about a year ago to have them change some DNS settings. While on the phone, the customer service rep had ...
3
votes
2answers
706 views

Deduplication of Encrypted Files

Let's assume I have an 18GB database that is backed up nightly by dumping the database and then encrypted using a modern algorithm such as AES-256. This database has a daily update of rate of ...
4
votes
2answers
244 views

Security of PGP for Long-Term Storage

How secure are PGP/GPG encrypted mails? I realize that it's probably fine for regular e-mail scenarios, but what about the security over longer time periods (>30 years)? Is the 4096 bit limit for ...
4
votes
3answers
838 views

How can salted, hashed password storage be combined with a plaintext, nonce and hash based authentication?

My understanding is as follows: To securely store a password (e.g. in a database), you use a hashing algorithm designed for this purpose (designed to be slow, e.g. bcrypt), and you use a unique salt ...
0
votes
1answer
348 views

How to encrypt files without giving the user access? [duplicate]

I don't know if I should ask this question on security.SE or stackoverflow, so please move my post if necessary. I want to store my (C#) application data in a way that the user cannot read or modify ...
4
votes
4answers
2k views

Does a commercially available self destructing HDD (set in BIOS) exist?

Does a self destructing HDD (physically destruction) that will destroy after a certain time exist, or when I use some software to initiate its self-destruction? I guess it need to be set in BIOS or ...
1
vote
1answer
4k views

What method of secure erase is sufficient for MacBook Pro SSD Drives? [duplicate]

I would like to securely erase the hard drive of a SSD in a MacBook Pro. The Disk Utility does not give me the option to wipe this drive even when I boot into the System Partition. (it is greyed ...
13
votes
2answers
751 views

Secure wiping of EEPROM and flash memory

Older magnetic storage exhibited some data remanence, so a recommendation emerged to wipe data by overwriting it multiple times with varying patterns — the “Gutmann wipe”. More recent hard disk ...
3
votes
2answers
685 views

Shutdown: Clear virtual memory pagefile

I was reading about Windows Local Policy of "Shutdown: Clear virtual memory pagefile". I need some clarification on this brief policy description: What do it mean by operating system that allow ...
3
votes
1answer
229 views

Remote System Administration of an Encryption-Switch-Encrypted Infrastructure

I can't seem to find a decent explanation anywhere of the practicalities of remote system administration (e.g. SSH) of an encryption-switch-encrypted SAN-stored infrastructure. The environment will ...
1
vote
1answer
572 views

Browser cache, cookies, active logins and other data

This question is regarding common browsers, even though I may refer to Firefox settings. Not IE though, I wouldn't expect that to be in any way secure. I'm seeking to know how secure it is to let the ...