Security related aspects of databases and database access.

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Is it possible to make cracking a password pointless to an attacker with database access?

I've been reading information on making passwords secure, but what are the reasons an attacker would want to put effort into getting the original password? If an attacker does indeed have a copy of ...
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3answers
1k views

Why are triggers not often used to secure a database?

I did an intern for a company becoming PCI compliant and instead of using triggers to prevent SQL injection, I went through 1000s (if not more) lines of web-app code and called functions every time ...
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4answers
4k views

LDAP vs MySQL for Usernames and Passwords

I understand the LDAP databases are more secure, but is it always necessary to use LDAP instead of MySQL for usernames and passwords?
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3answers
458 views

Strategy for updating stored passwords to more secure hash? [duplicate]

I know that we cannot update our hashed passwords without having the plain text password to re-hash. When a member logs in with login/password, we have the plain text, so that gives us an opportunity ...
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4answers
2k views

If a hacker were to compromise a GMail database

Assuming the systems that store the Gmail database is compromised what is preventing them from reading everyone's emails by looking at the data in the database? I assume nothing, and in order for ...
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4answers
101 views

For all the hassle it brings, why isn't password management handled by the database?

Right now, we might do something like password varchar(72), when defining a password column, with for example BCrypt. But there's a lot of folks that don't do this very effectively. Maybe they just ...
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4answers
351 views

“Out of the box” database security

When you install a RDBMS (say, PostgreSQL) and create a database, without taking any additional steps, what can you assume about the security/confidentiality of the data? I mean, is it encrypted by ...
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3answers
500 views

How do attackers find the database technology used by a web application?

These days there are several database technologies are available for data storage purpose. While performing injection attacks, how do attackers actually identify the database used by a website? If ...
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3answers
2k views

how long does it take to brute force varying encryption standards?

Let's say I want to encrypt information in a database. What would be the best encryption algorithm to use and why. I was thinking AES, since it's widely used as a government standard, but if the ...
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2answers
330 views

Storing lots of passwords that different levels of employees need access to

I am wondering what other people do for storing passwords. Our current model at my employer is fundamentally flawed in my opinion, so I am trying to see what other people do so I can select the best ...
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2answers
937 views

Potential insecurity in not sanitizing variables before INSERT with prepared statement in PDO

I use PDO with prepared statement when connecting to my database, and I do this because it is considered a safe way to do so, but one thing I could not help but to wonder was, can submitted data from ...
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3answers
148 views

Feasibility of time-based database brute-force attacks on websites

I recently learned that there is an attack that utilizes the fact that when brute-forcing a compared string (e.g. hash from a password or token) in a database the query fails a few nanoseconds earlier ...
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2answers
146 views

Database security: Remove superuser role

I've recently heard on some IT-SEC conference, that good idea to secure database (probably against privilege-escalation attack) is to remove superuser role, and leave only user roles. I imagine that ...
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3answers
537 views

What things should a penetration tester know about databases?

I want to start learning about databases from a penetration tester's perspective and I would like to know what things will be useful on the long run. Also do you know any good books to kickstart my ...
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2answers
30 views

Database Protection : External & Internal

My company is using a weird database setup and I can't really figure what it is adding in term of security. Our Setup Outside World [Firewall] DMZ – Web Server [Firewall] External Database ...
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2answers
312 views

High level design for secure web application

I'm looking for some advise on designing a secure web app for storing passwords. Why reinvent the wheel? Because I don't trust a 3rd party with all of my passwords. Here are my thoughts: There are ...
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2answers
214 views

Should I use a separate SQL Server instance for a database with PII?

We build software which needs a SQL SERVER database. This database will hold private user information (address,bank, ...) My question is: Should I install my database in a fresh SQL Server ...
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2answers
564 views

MySQL Access Control?

I have read somewhere that it is better to have two different MySQL logins in order to prevent hacking. What I mean is having one MySQL login for read access (SELECT permission) and another login for ...
2
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2answers
112 views

Is this logic security / performance wise or not?

Each physical user will have about 20 tables in the database. When a new user registers, another 20 tables will be created with access only for their new MySQL account. Data does not have to be ...
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1answer
2k views

How to secure MySQL based web session data table?

I have the following MySQL session schema: CREATE TABLE `SessionData` ( `id` varchar(50) COLLATE utf8_unicode_ci NOT NULL, `data` text COLLATE utf8_unicode_ci, `date` datetime DEFAULT NULL, ...
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1answer
931 views

iOS/Android authentication and security

Here is what I am trying to do and can anyone provide some best practice advice for authentication and security? Each user will have their own private database on the cloud. He will have his local ...
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2answers
64 views

Securing microsoft access database

Let's say I have a website which is written in ASP and I keep my .mdb database in a random directory like /asd8asd/dkdgk32/asdmv/askdasd/kasldk.mdb Can an attacker find database's location without ...
2
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3answers
262 views

Most secure location of database

Let's say I have a straight forward completely database driven web site application and I store my database on my web server in the DMZ. I won't be broadcasting the IP address of my database because I ...
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3answers
130 views

How could a shared password database be implemented?

In the traditional form, a password database is similar to any other database file, except the contents are encrypted using a key derived from a passphrase entered by the user. The user enters their ...
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1answer
177 views

Hiding remote database credentials in application

If I'm building an application that connects to a remote database, where should I hide the credentials? I've seen many suggest that you go through a web-application and use POST and GET requests to ...
2
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1answer
235 views

Where to store uploaded images from perspective of security

It is quite common that uploaded files (images, videos, etc.) are stored on a file server because of performance and database-recovery-time reasons. But is there a benefit of storing such files in ...
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1answer
360 views

Uploading Executable Files

Using proxy software, I was able to bypass a file upload control file-checking for an asp.net system I am pen testing. I noticed they are saving the file into the database as bytes, and it is ...
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2answers
185 views

Store which parts of an IP address, for user to remain anonymous?

I'm thinking about building a very anonymous forum, where people can comment and upvote each other's comments anonymously. People are supposed to remain anonymous even if the forum's database contents ...
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1answer
407 views

Should I encrypt Long-lived Facebook Access Token when storing them in my DB?

I own an application that grabs some Long-Lived Facebook Access token, in order to be use later according to the corresponding logged user. Should I need to encrypt them before storing them, to avoid ...
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3answers
585 views

How can I prevent my database from being compromised if my CakePHP app is compromised?

I have an app server hosting a CakePHP app and a database server hosting the databases. The servers are physically separate. The databases contain encrypted sensitive information. The encryption keys ...
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3answers
13k views

Database field type for password storage?

In the past I used varchar(255) for storing hashed passwords (no salt). Is this still enough? Or are longer fields required?
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2answers
160 views

How can I protect a client's mirror of the server's database?

The scenario is as follows: There are clients that users can access and work with. These clients can be online or offline. There is a central database on a server, holding all the authorization ...
2
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1answer
73 views

How to save passwords temporarily?

I work for a hosting company and are about to design a rest api for a 3rd party so they can create Active Directory user accounts. I also want this api to be async and robust enough to survice ...
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1answer
65 views

Do password derived encryption keys need to be salted?

If I have a database where I store users' sensitive information, and encrypt that information, do I need to do something like PBKDF2(password,salt,10^5) for the encryption key as well as the hash?
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69 views

Trusted vulnerability database source [closed]

Would like to ask currently, is the National Vulnerability Database (NVD) still the place to go if you want to search for update vulnerabilities for different products? I find that some product ...
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2answers
119 views

How to appropriately secure a database using different db users

I was thinking recently of the steps to secure a database server. Most of us are aware how to handle the security on the application side, although a malicious user might find his way to bypass the ...
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1answer
64 views

Display link to admin section or not?

I have a question and answers site. I have an admin section. From that section I can delete users, threads, responses, and edit various other things. I have some simple code at the start of the admin ...
2
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1answer
183 views

Good resources on ACH/banking details security?

In our web application, we allow customers to enter their bank account information as a method of payment (account number, routing number, bank name). This information goes nowhere at all; it's up to ...
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1answer
489 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 ...
2
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1answer
302 views

PCI DSS compliance for storing PAN and PII in multi-tenant environment

I wanted to know if I can still be PCI compliant if I store card holder and PII information for multiple tenants in the same database? I.e., have an identifier on the table level to identify the ...
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2answers
1k views

What does Gazzang zNcrypt actually protect against?

In an effort to increase security of our website, I'm reading up on Gazzang zNcrypt, which claims to protect data in databases from breaches. Technically, it seems to do filesystem encryption. As far ...
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2answers
776 views

Least insecure way to encrypt a field in the database so that it can still be included in queries

I have a table where all columns need to be encrypted (aside from the PK). This will be achieved using AES at the application level. However there is one particular field that needs to remain ...
2
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4answers
1k views

Code, Data and Passwd encrypted? sqlplus $USER/$PASSWORD@$ORACLE_REMOTE_SID

Lots of our *NIX scripts use "sqlplus $USER/$PASSWORD@$ORACLE_REMOTE_SID" I know that not good to have clear text password in scripts (there is no alternative at the moment). But question is the ...
2
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1answer
506 views

Best security algorith for storing passwords [duplicate]

Possible Duplicate: Which password hashing method should I use? I want the best cryptography algorithm for storing passwords in database, which one should I use and how can I implement ...
2
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2answers
334 views

Practical steps for encrypting an encryption key for data stored in MySQL

So I'm working on my first project where user data is stored as encrypted using the user's password as (part of) the key. I have read many similar things about best practices, but the details seems to ...
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2answers
61 views

Are foreign keys linking to a table with PHI considered PHI under HIPAA?

Table 1 has PHI and it's encrypted. Table 2 doesn't have PHI, isn't encrypted and has a foreign key to Table 1. I'd like to recommend the strongest security. If there's a requirement in HIPAA, it's ...
2
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1answer
422 views

Is this a sensible way to encrypt user data?

I want to make a site for storing sensitive user data, that retains per-user data encryption in the event that the database is compromised. This is the model I was thinking of, to give the best ...
2
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1answer
730 views

Is it fine to store single-use beta keys plain-text?

Is it okay to store single-use beta keys in plain-text in the database? I'll be pre-generating and storing about 2M keys. The keys get passed around so that people can sign up with it, rather than let ...
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2answers
375 views

What are the risks of encrypting a database with a single symmetric key

An application is required to store sensitive data* on each user. Additional columns are added to the database which store cyphertext encrypted on the application server. The algorithm of choice is ...
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3answers
220 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 ...