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

learn more… | top users | synonyms

1
vote
0answers
39 views

What is the current consensus on storage of primary credentials or long-lived cryptographic tokens?

The problem: some environments need to use plain text credentials or long-lived tokens in order to unlock a specific functionality. Examples include third party legacy services which need a ...
1
vote
1answer
104 views

How to implement iterations when hashing passwords?

To securely hash passwords, algorithms such as PBKDF2 do many iterations of a common hash such as SHA1. Are there certain ways that these iterations need to be done to be safe? In particular, from ...
0
votes
0answers
41 views

Risks with shared informations of an Network Attached Storage

I'm trying to create a file server with my RaspberryPi to deploy all over the private network. I therefore mounted my disks on installed Samba and began to modify the settings. By default shared ...
2
votes
4answers
101 views

Are there any quick-erase devices with a small memory available for storing key information?

I would like to set up my computer's full disk encryption to unlock with a key file (preferably one that uses the SD card interface, but I'm not particularly picky) because it's annoying to enter in ...
-3
votes
1answer
28 views

Is it fundamentally possible to prove a current industry standard end-to-end system of secure data storage and transfer?

I know we can design an ultra simple system that is proven to perform one thing with perfect security. We've done that. That's called a proven system, and it has been done with micro-kernels. (An ...
22
votes
3answers
3k views

To what extent does formatting a disk (securely) remove its data?

If the goal is to make data no longer retrievable, how secure is it to format the disk? I assumed formatting the disk overwrites free space (thus making it a safe bet no one's going to be able to ...
0
votes
1answer
48 views

Store password ciphers using Powershell ? DPAPI/AES

Hi and sorry if it is in wrong place I am making a script that requires to have a lot of server's IP and their passwords stored into a file. I wanted to use Windows DPAPI, but as we can easily ...
0
votes
0answers
48 views

Handling Credit Card info in Source Code

Background Info I am using an API to make donation to charities (First Giving API). The API only supports credit card info for making a donation. Due to the requirements of the application, donors ...
-3
votes
2answers
113 views

Is it more secure to delete emails from the server once a client has downloaded them?

From this email provider We strongly adivse people to download their email whenever possible, so as to lessen the amount of personal private data present at any time on the servers. Does ...
2
votes
1answer
52 views

Recommendation Key Management and Storage in Cloud Storage

I am currently researching about key management in the cloud storage and looking for alternative for it. The current system stores encryption key for each file in the server and each key is encrypted ...
1
vote
0answers
108 views

How can I safely store a password during a user session

I am writing an Java application that is using OAuth to authentificate against a server API. The server is offering the OAuth secrets for users to copy from its website. Because each request needs ...
1
vote
2answers
104 views

How secure is a BIOS/UEFI hard drive password? [duplicate]

I'm buying some new machines and am concerned about security of the data should the machine be physically stolen. It's easy to take out the drive, image it, and read what you want. I could use file ...
0
votes
0answers
30 views

How to know who and when files and folders have been deleted in CentOS? [duplicate]

I have a dedicated web server and there is some files and folders have been deleted from my client's sub-domain accidentally and there are more than one user mange the client site. How to know who ...
14
votes
1answer
3k views

Is a single pass enough when disposing of a HDD? [duplicate]

I am in the process of wiping a number of hard drives using DBAN. I always believed that a single pass makes the data near impossible to recover, but DBAN has a default of 3. Is it any more secure, ...
0
votes
2answers
81 views

Personal Cloud Storage vs. File Sharing Services

In terms of maintaining Confidentiality, Integrity, and Availability, what are the risks and benefits associated with setting up a personal cloud storage device on your home network versus using a ...
2
votes
2answers
227 views

Best reasonable way to store a secret safely

I'm working on a software that need to store and use secrets. These secrets can be for example: a password to connect to a database a client secret for an OAuth 2.0 client_credentials grant. I ...
0
votes
0answers
28 views

What are the risks of sharing disk storage by NFS by two machines in different security zones?

In order to share files between two systems, an IT department has decided to share disk storage in a SAN device. The volumes are shared by NFS. The two machines mount the same volume in the SAN. The ...
1
vote
2answers
108 views

Keeping user files secure while allowing a web-application to use the files

Short background I am currently in the process of designing a web-application where the user uploads some files to the server and then asks the server to do some calculations based on these files ...
2
votes
1answer
58 views

How well does FDE protect against disk firmware malware?

In early 2015 news broke that the NSA was installing firmware backdoors in many hard drives. I was wondering, if there was a BIOS and Hard Drive backdoor how well would full disk encryption protect ...
3
votes
3answers
139 views

Good way of storing lots of third-party passwords

I've consulted this question, but I'd like to hear some more input. I'm building a scraping app that is going to act as an aggregator of sorts for a large number of businesses which use a few popular ...
2
votes
0answers
28 views

OAuth2 client account & data storage [duplicate]

Context I have a REST API where a user can create an account from a web client. The password is saved as a salted hash in a database. When a user is authenticated they can save and retrieve private ...
1
vote
2answers
34 views

Rembering password on client (not database) [closed]

I am trying to implement the capability for my program (C++) to remember a user/password combination, so the user does not need to type it in again. Is there a secure way for my program to store ...
2
votes
1answer
142 views

How to store client login credentials?

My company has to constantly connect to remote server where there are numerous way to access, often via vpn and remote desktop connections, as well as SQL servers. There are over 50 clients that this ...
3
votes
2answers
132 views

Is there a way to guarantee removal of data after closing Facebook / Gmail / Dropbox account? [closed]

Of course my default way of thinking is: deleted: true while keeping all the data in place. In fact I would be interested in knowing what standard operating procedures are in place for retention of ...
3
votes
1answer
186 views

Using Google Cloud Platform to store credit card data

I have made an iPhone app for users to book hotel rooms. A third party provides the service for booking the hotel rooms and charging the credit cards. At the moment, my app makes no attempt to save ...
2
votes
1answer
104 views

Secure sharing between Windows computers

I'm working on a project to setup a secure system to share files between 5 Windows computers. The computers are part of a domain so could have multiple different users logging in (based on an AD ...
4
votes
4answers
179 views

Should I format storage after buying it?

I've just bought a new (unused) external HDD. Should I format it or is it save to use it directly? Did it already happen that a device was infected before the first customer use? Will formatting ...
2
votes
1answer
102 views

Can we determine how securely files are stored on a cloud storage service?

After asking two questions about the security of online cloud storage, it seems to me that we can only at best speculate as to the security practices of the hosting company, and believe what they tell ...
1
vote
2answers
177 views

How can a seamless cloud storage service be Zero-knowledge?

Cloud based storage services like Dropbox and Google Drive are a cause for concern when it comes to privacy. They store encryption keys for your files on their servers. Therefore, anyone who manage to ...
2
votes
0answers
114 views

How to store a file securely on the windows file system?

Problem: I have a windows service running under local system account. I have a blob of data that I want to store securely and persistently between reboots. I have decided to store it as afile( as ...
0
votes
2answers
194 views

how to store and retrieve nonce in practice

As nonce is supposed to be random and used only one time, when receiving a nonce, I need to check it with all past nonce records. That means I need a database to store every nonce I had before. Of ...
5
votes
1answer
623 views

Convenient Write Once Media to attach to a computer: A USB stick or device?

What is a convenient write once media to use with a Computer, preferably via the USB interface. I often see this use-case in several ways: I have a server whose logs need to be on a medium that ...
2
votes
2answers
994 views

How to safely store bearer tokens on server?

Imagine you're running a service that implements an OAuth 2.0 flow to allow your end users to log into 3rd party apps, and authorize those apps to consume your service's data through some API. Upon ...
0
votes
2answers
191 views

Saving passwords in database

I have recently been studying a lot on writing secure code and choosing secure methods for saving passwords to a database. I'm wondering if it's secure to use ready made libraries or APIs to do this ...
0
votes
0answers
37 views

Is the SanDisk ULLtraDIMM secure after power-down?

I found an interesting product last night called the SanDisk ULLtradDimm SSD (product page), which essentially claims drastic performance gains by plugging an SSD into a standard DDR3 memory channel. ...
5
votes
1answer
113 views

If I fill a hypothetical 1gb HDD with 1024 single 1mb files, will all sectors be overwritten?

When a file is deleted, its only marked as an unused sector of a hard drive. Im wondering if it's possible to fill a 1gb HDD with 1024 individual 1mb files to completely use every sector?
19
votes
5answers
2k views

Considerations for long-term key storage (paper backup, media for vault storage)?

I'm reviewing our company's security procedures regarding cryptographic keys and master passwords, and also my private system at home. The key generation process is pretty much the same as that ...
6
votes
5answers
168 views

Can I show Credit Card Data to final customers and be PCI Compliant?

I work with reservation management syatems. In the hospitality industry there is the concept of credit card as guarantee. By it when making any kind of reservation you are asked for your credit card ...
-5
votes
1answer
93 views

Does Server Mistrust improve security? [closed]

By server mistrust, I mean the fully implemented lack of customer plaintext on a vendor's system, and lack of vendor access to customer plaintext. Specific case in question: Password and SSH key ...
19
votes
4answers
4k views

Why is writing zeros (or random data) over a hard drive used when writing all ones is more beneficial? [duplicate]

As far as I know, in order to securely delete the hard drive's contents, one should fill it with zeroes or, for added security and harder recoverability, random data first and then all zeroes. In ...
3
votes
1answer
69 views

Is it safer to store valuable information on a unsecure client or send the data through the internet?

Background: I'm creating a secure web app with the purpose to act as a no-knowledge storage for small data (we're talking a few bytes). Since all the encryption and decryption happens client-side, ...
3
votes
3answers
348 views

How is truncation according to PCI DSS secure?

In section 3.3 of the PCI standard, it says that when displaying PANs, limiting visibility to the first 6 and last 4 digits of the PAN is considered secure. Doing some quick math, on a 16 digit PAN, ...
2
votes
3answers
547 views

How can my bank issue a new credit card with the same pin number? [duplicate]

I live in France, and I have a debit card issued by my bank. When it expires, I receive a new one with the same pin number. I recently asked my banker to issue another card (a different one, for ...
1
vote
4answers
289 views

What options exist for authenticated full-disk encryption?

Title says it all really. I'm toying with the idea of storing some disk images in "the cloud", but am concerned about the possibility of an attacker manipulating cipertext to do evil things once it's ...
1
vote
1answer
157 views

Strategy for encryption before cloud storage

Apologies if this has been asked before. I am looking to encrypt documents before storing in the cloud. There will be a separate metadata storage, which could be either internal or cloud hosted. My ...
0
votes
1answer
94 views

Safely encrypting data received through HTTPS

I am receiving sensitive data over an HTTPS connection and need to store this on disk, encrypted so no one can tamper with it, but for reading later on. Each user in the system has a password. The ...
0
votes
1answer
133 views

Encyption Key Storage and floating point encryption

I am working on a web application where I need to encrypt some fields based on user configuration and display the decrypted information. The field values can be text or integers or floats. We are ...
0
votes
1answer
47 views

How are various softwares' files/information kept safe from me, the user [closed]

I started making a simple user authentication program just for fun, and I realised I don't know how to keep safe the files that will store all the usernames and passwords. This got me thinking. What ...
5
votes
2answers
313 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 ...
1
vote
2answers
961 views

Is a sensitive NAS behind a router safe?

I have four pcs connected to a switch connected to a router that gets connected directly to the internet. How safe is a NAS attached to the same router along with the switch plug? I'd like to have ...