Integrity is the property of preventing unauthorized modifications of an asset. In other words, integrity protects against the threat of tampering. It is one of the three key security properties of an asset, along with confidentiality and availability.

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Why aren't application downloads routinely done over HTTPS?

We all know we should be using SSL whenever we collect passwords or other sensitive information. SSL provides two main benefits: Encryption: The data can't be read by a middle-man while in transit. ...
21
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6answers
12k views

Does SSL/TLS (https) hide the urls being accessed [duplicate]

Suppose I type this in my browser https://www.mysite.com/getsecret?username=alice&password=mysecret and an attacker is watching all traffic from me to my ISP. What information is protected by ...
18
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5answers
3k views

How can I ensure my dll has not been modified?

I have an old project in VB which created an unique pc code from MAC address and disc id. This was used to identify a pc so credentials cannot be used between pcs. This project migrated to C#, and I ...
17
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1answer
921 views

Is there a way to verify a binary against the sources?

It seems like there is no practical way to verify the full integrity path of precompiled and packaged software? I can check the downloaded package itself by hashes, but I have no verification if the ...
16
votes
7answers
3k views

Tripwire - Is it security Theater?

Tripwire type intrusion detection systems supposedly protect your system from rootkits, by monitoring the checksums of important binaries for changes. Let's say I have tripwire configured to run ...
16
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1answer
3k views

Something is changing my hosts file without asking

First: I can't find any information on this phenomenon, not anywhere on the net. I don't know which application does it, but something in my Windows 7 Home Premium system (fully updated & legal) ...
13
votes
1answer
917 views

Are there Linux rootkits circulating that directly modify the kernel (without modules)?

It has been said, over and over, that disabling dynamic kernel module loading on Linux increases security. I understand why people give this advice, but I've always assumed that a bad guy could ...
9
votes
5answers
963 views

Protect application from being modified

I have a question about how to protect a program from modification if that program is able to communicate with a remote validation server. More specifically I'm asking for android APK file, but it can ...
7
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4answers
1k views

Why secure encrypted data consistency by strong hashing?

Consider the SSH protocol: the SSH packet is like [data, SHA1(data)]. The packet is entirely encrypted by a block cipher. The question is, why do we need a strong hash to protect the packet ...
7
votes
1answer
906 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 ...
7
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3answers
1k views

What does a court need to successfully prosecute a hacker? Please cite previous cases if possible

Once a business decides it is worthwhile to persue legal action against the attacker, what information and processes should be followed so that: Integrity of the investigation is maintained The ...
7
votes
1answer
603 views

What prevents the Intel TXT boot loader from being maliciously altered?

From my understanding of Intel TXT, the technology can be used to put the processor in a trusted state where measurements can be performed. My understanding looks something like this, where I believe ...
6
votes
3answers
373 views

How safe are copies of Firefox that are on various Mozilla mirror sites?

If I end up downloading a .dmg or .exe (depending on OS) installer from some mirror site, how can I be sure that a virus or trojan or spyware has not been added? I don't see any mechanism for ...
6
votes
4answers
2k views

Safest way for multiple users post to a single social networking account

Suppose I have a team or organization managing a single twitter account and a single facebook page. Different users need to be able to post content to the same account. How can I minimize the risk of ...
6
votes
3answers
79 views

Automatic detection of a compromised web server

I'm trying to figure out if it is possible to automatically detect the the fact that the HTML or javascript files on a server have been tampered with or changed by an attacker. Our website, say ...
6
votes
2answers
1k views

What security standards and regulations are in place for bank ATM?

Are there any international or US mandated standards and regulations that apply to communications between automatic teller machines and bank's central office? Are banks or ATM operators subjected to ...
5
votes
3answers
4k views

Bell-LaPadula imlementation example

I'm currently studying the Bell-LaPadula model and i need to do an implementation as an example. I understand how the model works, but I have difficulties implementing it in a programming language ...
5
votes
3answers
3k views

Using MD5 for file integrity checks?

General Always check the MD5 hashes of the .NET Framework assemblies to prevent the possibility of rootkits in the framework. Altered assemblies are possible and simple to produce. Checking ...
5
votes
2answers
168 views

Data integrity of malicious content in the database

From a data integrity standpoint, if I persist the following code into my database: <script> alert('hi'); </script> should I sanitize it before persistence, for instance making ...
5
votes
4answers
313 views

Contact person by phone, when their phone might have malware

I have a problem setting where I want to contact a user by phone, and where I need to protect the integrity of the phone call as much as possible. I'm wondering about how to design the interaction in ...
5
votes
2answers
4k views

How can I check the integrity of the downloaded files?

I know we use hash functions to check for the integrity of the files etc... but my question is how can we check for the integrity of the files being downloaded from some server?
5
votes
1answer
799 views

Is Torrent safe for sharing legitimate files (file verification)? Does it use SHA1 or SHA256?

Let's assume that a legitimate torrent file has been safely and successfully downloaded over HTTPS and perhaps even OpenPGP verification was used to verify the integrity of the torrent file. How good ...
5
votes
4answers
2k views

What are the most common files to check with File integrity monitoring software?

I have a file integrity monitoring suite and in it I have to select specific files and folders for it to monitor. There are some obvious services that I want monitored like our web-server. Is there a ...
5
votes
1answer
163 views

Integrity check against package repository?

I have a Debian installed. When there are security updates, I review and install them as soon as possible and think about using automatic updates. From time to time I want to boot from a clean boot ...
5
votes
1answer
165 views

Authentication by Signing or MAC?

I'm still new to security, so I'm sorry if this question doesn't make sense or if I'm completely off base with something. I've got some messages I want to encrypt (probably with AES-256-CBC) and send ...
5
votes
2answers
384 views

Oracle Internet Directory (OID) hardening

What are best practices, recommendations, required reading for securing/hardening an Oracle internet directory? note: OID is compatible with LDAP version 3.
5
votes
2answers
204 views

Which Windows Files Should be Monitored by HIDS?

I highlighted my question below. Here is some background. It's easy to find data showing the most commonly trojaned/modified Linux binaries and config files. ps, ls, find, kill, lsof, passwd, ...
4
votes
1answer
2k views

Who is the creator of the CIA triad?

The Information Security goals - Confidentiality, Integrity and Availability (CIA) - are often referenced to as the CIA triad. As I am writing on my master thesis, I am wondering to which resource I ...
4
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3answers
502 views

Preventing users from tampering with replay data [duplicate]

Possible Duplicate: Protect application from being modified This probably belongs here as much as it does belong in gamedev.stackexchange.com, but I suppose I might find better technical ...
4
votes
3answers
415 views

How do I transfer the HMAC?

I have a file I'd like to encrypt with a symmetric key using AES-256 and then use an HMAC for integrity. So I don't "roll my own" scheme which I know is a big mistake, what are the standards for using ...
4
votes
2answers
870 views

How to correctly implement AES in a backup application

I am writing a back-up application which should have the feature of encrypting the back-up. It must encrypt file data, paths and filenames. The application is being written in C# (.NET). Target is ...
4
votes
2answers
908 views

Detect changes in /boot when using full disk encryption

When running a fully encrypted linux system using dm-crypt, the /boot partition has to be unencrypted to boot, as far as I know. I've setup a server that can be unlocked remotely by connecting to a ...
4
votes
6answers
731 views

Is a self signed certificate sufficient to prove the integrity of my executable?

I have an EXE file on Windows that I have to distribute around. It's based on tclkit so an adversary could unpack it, change some tcl script inside and repack the exe. I would like to know if this ...
4
votes
1answer
96 views

Securing client-side data from users

So my problem, in its general form, is encrypting test questions such that a client-side testing application can access the questions while students cannot. The naive approach, in my opinion, is to ...
4
votes
1answer
450 views

In the Clark Wilson models, why can't the TPs be executed in parallel?

I am studying the Clark-Wilson model, I can't exactly understand why the TPs must be executed in serial, is there a way to execute them in parallel? What would happen if I did execute them in ...
4
votes
1answer
59 views

Can BTRFS provide authentication on an encrypted disk?

One of the problems of disk encryption is providing authentication. An attacker with access to the ciphertext can modify the ciphertext at will without consequence. Given, this isn't a likely attack, ...
4
votes
1answer
58 views

Does LUKS protect the filesystem integrity?

I have read in: http://css.csail.mit.edu/6.858/2013/readings/bitlocker.pdf that Bitlocker does not provide data integrity since it takes more space in the disk. The PDF says also that drive ...
4
votes
1answer
108 views

MD5 security concerns in download verification

The MD5 hashing algorithm is known to be vulnerable to collisions for a number of years now, see its Wikipedia entry. Still, I see that in many places throughout the web, MD5 is used to verify ...
4
votes
1answer
385 views

Does deliberately wrong information from a DNS server violate standards generally accepted good practices?

For certain host names my DNS gives me a wrong ip address (the ip address of a transparent proxy) for which inverse DNS look up does not give me back the host I originally looked up. This is related ...
3
votes
4answers
4k views

I had SSL certificate on my site but still it has been hacked…how to prevent this from happening?

I used SSL certificate on my site but still it has been hacked. How do I prevent this from happening? Do SSL certificate come with a waranty which would compensate me because my site was hacked?
3
votes
3answers
256 views

Why are handheld tape recorders used?

Pardon me for doing the following as I know it is cringed upon (the tv reference) but: Is there any good reason for the usage of 'tape' recorders? Ex. taping a conversation between criminals, this is ...
3
votes
3answers
299 views

Company decrypting SSL, is it common?

We've just implemented a proxy that decrypts all SSL traffic in order to classify and scan it. Naturally a lot of our users feel concerned. We're a small company (100 users) owned by a big company ...
3
votes
2answers
290 views

Confidentiality and integrity for web session

When the client authenticates with our service, he is issued an opaque "token". This token includes the information, that identifies the client and some other information about the client ("payload"). ...
3
votes
5answers
246 views

Is DRM considered Confidentiality, Integrity, Availability, or some combination of the three?

I was discussing software trial time limit enforcement with a colleague and the idea of CIA came up. Do stricter enforcement techniques increase confidentiality at the expense of availability? (for ...
3
votes
2answers
367 views

What's the point of using multiple checksum algorithm with “aide”?

In aide the author offers more than one hash algorithm to do the check-sum, why is that? Aren't a single one, i.e sha512 enough for determining file changes? I believe these algorithms are all ...
2
votes
3answers
331 views

Remote Connection Tampering

My small high street laptop repair/service/maintenance shop has been up and running for about 3 years. It's doing quite well so I'm looking to expand into other areas of the PC market. One area I ...
2
votes
3answers
1k views

Is SSL Tamper Detectable?

I know how SSL provides security against people reading your messages - by encryting the message with a SYMMETRIC KEY, which was exchanged during SSL Handshake with the help of ASYMMETRIC KEYS. But I ...
2
votes
1answer
142 views

TLS WG Charter and Security Goals

I was looking at the TLS Working Group Charter. I noticed that confidentiality and integrity of messages for those who desire it are not goals for the group. Naively, I believe confidentiality and ...
2
votes
3answers
2k views

Why is it necessary to match the checksum of a download with another file provided by the same server? [duplicate]

Possible Duplicate: Does hashing a file from an unsigned website give a false sense of security? On many servers providing files for download, there is a file on which checksums are ...
2
votes
1answer
592 views

What extra protection is added to an REST API over HTTPS by the use of some kind of HMAC?

I'm designing a RESTFUL API that will always be used over HTTPS, what security advantages over the use of HTTP Basic Auth could be brought to my system by using such kind of message authentication ...