Questions tagged [integrity]

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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Consider a Fraudulent bank website, would it violate all the aspects of the CIA triad or any one? [closed]

I believe it would violate all the three aspects due to following reasons: Confidentiality: Since the website is obviously a scam, in case any person/user registers it, the data of the user would not ...
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85 views

How hard is to reverse engineer a signature for a given message?

Given the following situation: User makes a request for temporary access to a video Backend responds with a json file containing timeAllowedInSeconds: 5 Backend also responds with the signature of ...
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65 views

Does gpg (or openpgp in general) authenticate symmetrically-encrypted data?

When using gpg --symmetric to encrypt a file/message with a passphrase, is there any cryptographic integrity check to prevent an attacker from modifying the ciphertext? E.g. does gpg (or any other ...
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27 views

Does dnf enforce cryptographic authentication and integrity validation by default for all packages? (fedora linux)

Does the built-in dnf package manager in Fedora-based systems require successful cryptographic authentication and integrity validation for all packages? I know that software downloaded with apt-get ...
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1answer
43 views

Does pacman enforce cryptographic authentication and integrity validation by default for all packages? (arch linux)

Does the built-in pacman package manager in Arch-based systems require successful cryptographic authentication and integrity validation for all packages? I know that software downloaded with apt-get ...
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How does validating the PGP signature of a downloaded executable against the publisher's public key show that the binary has not been tampered with?

Websites that host downloadable executables often provide measures to confirm the integrity of the data that is available to download. Such measures include: Hosting the website under HTTPS; ...
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62 views

E2E-Encrypted Storage: How to detect that data has been rolled back?

I am aware that it is possible to use a block cipher with the GCM-mode to provide authenticity, but this does not completely do what I need. I have a cloud storage provider I do not completely trust, ...
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62 views

Cloud storage data integrity without trusting the server

Assuming I am using a cloud storage provider like Google Drive, how do I know that data hasn't been lost, deleted, modified or created by the service provider? I think the answer is that it is not ...
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104 views

Why aren't installer isos gpg signed?

When downloading a Linux installer iso, the user is supposed to check the iso with sha or m5sum and compare the result against a checksum file, and then check the gpg signature of the checksum file. ...
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Can a meltdown attack also violate data integrity of other processes or is it just violating data secrecy?

Can a meltdown attack also violate data integrity of other processes by obtaining different passwords or is it just violating data secrecy by reading data it is unauthorized to do?
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Open-Source Hardware Security Modules (HSM)

Are there any Open-Source Hardware Security Modules (meeting OSHWA requirements)? I've worked with Utimaco HSMs, but I'm not a big fan of closed-source hardware -- especially when it comes to security ...
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Does snapd enforce cryptographic authentication and integrity validation by default for all packages? (debian, ubuntu)

Does the snapd package manager in Debian-based systems require successful cryptographic authentication and integrity validation for all packages? I know that software downloaded with apt-get packages ...
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1answer
107 views

What config files and logs files of a Linux system (CentOS 7) deserve to be monitored by a SIEM?

I am not a security expert (I am more a software developer) and I am working on a project related to a SIEM installation (Wazuh). This installation is only a demo for a customer, in a second time a ...
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1answer
240 views

Authenticate-then-Encrypt: does the authenticity provide a benefit?

First off: I know that encrypt-then-authenticate is better, however I want to understand the following for authenticate-then-encrypt. The underlying cipher is AES-CTR or AES-CBC for this consideration....
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How to verify integrity of software when the download provider doesn't publish hashes?

I noticed that certain software does not provide hash anymore nowadays. E.g. Zoom https://zoom.us/download wolf@linux:~$ ls -lh zoom_amd64.deb -rw-rw-r-- 1 wolf wolf 44M Jan 1 00:00 zoom_amd64....
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Does TLS provide data integrity? [duplicate]

I've looked around on this site and I've not seen a clear answer on this question. From what I've read TLS does not provide data integrity unless specific ciphers are used which use HMAC'ing as part ...
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Does npm (Node.js package manager) provide cryptographic authentication and integrity validation?

Does the npm package manager cryptographically validate its payload's authentication and integrity for all packages after downloading them and before installing them? I see a lot of guides providing ...
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38 views

Does yarn (Node.js package manager) provide cryptographic authentication and integrity validation?

Does the yarn package manager cryptographically validate its payload's authentication and integrity for all packages after downloading them and before installing them? I see a lot of guides providing ...
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23 views

How to ensure authenticity of photographic evidence and derived work?

Photographic evidence is not what it used to be before generative ai, reface, deepfake, live deepfake, etc. Is there a way to ensure authenticity of photos/videos, as well as derived work? For example:...
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1answer
105 views

Why there is nothing that automatically checks signatures of files downloaded in browsers? [duplicate]

When downloading files (mainly software/installers) from pages in browsers, sometimes it comes also with a cryptographic hash or a signature to verify the authenticity of a file against data ...
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162 views

How do I know that the ISO image of the Linux distribution I have downloaded does not contain the NSA backdoor?

I have downloaded the ISO image of Kubuntu 20.10 and installed it. I am afraid that the ISO image may have been tainted (for example, by the NSA) to insert a backdoor into it. As I see it, there are ...
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3answers
293 views

Different SHA256 checksum of same version of ssh binary on different machines

I was wondering if I compare SHA-256 of two binaries with same version on different machines, results will be two identical checksums. I tried this on ssh on macOS (Catalina). (I checked that ssh -V ...
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How Should Multiple Checksums Be Performed On the Same Data? [closed]

I am using CRC32 to verify the integrity of received UDP packets. Along with the generator polynomial, the sender will also specify how many checksums to perform on the sent data, as well as what ...
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1answer
64 views

How to ensure integrity of program execution on foreign(someone else's) computer?

I want to run my computer program(or code) on someone else's computer(with permission from the owner of the computer) and get the results back. How can I make sure the owner is running my program only,...
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How should backups be tested in large offices?

I always hear people say "test your backups", but I have no idea how that is done in practice when you have to deal with complex infrastructures. For personal backups it's easy to rely on ...
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1answer
110 views

what is the appropriate data integrity check control for the data at rest?

An application does encrypt the data using a secrete key before the data is being written to the database to prevent the disclosure attack. However how do we verify the integrity of such data when ...
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230 views

How can the authenticity of releases on GitHub and GitLab be ensured? Can their hashsums change?

To help ensure authenticity of packages some projects on GitHub and on GitLab add hashsums to the descriptions of the release on the Releases page. Sometimes, at least here, the hashsum are made part ...
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How are Android's native libraries protected against tampering?

On Android it is possible to add native libraries provided by the system (/system/lib/) or the vendor (/vendor/lib/) to a system app. For example, the libandroid_runtime.so is loaded with System.load(&...
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Cryptographic way to detect deleted rows in a database table

I have a web application talking to a PostgreSQL database. My threat model is the following: Attacks must not occur at rest. What i'm afraid of is unwanted deletion of data on a specific table, let's ...
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1answer
299 views

Is there any point in using PGP or S/MIME when your receipients mostly don't use it?

For an company with sensitive customer relations and above average secrecy how much does it make sense to implement S/MIME or PGP for providing their E-mails the verification functionality (please ...
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1answer
73 views

How to validate the integrity of a back end?

I just read following statement in a technical guideline about network-accessible mobile devices with medical applications (BSI TR 03161): The application MUST verify the integrity of the back end ...
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Signing event-stream responses

I am working on an application where the general approach is signing most response payloads with HMAC, but there are a couple of endpoints that return text/event-stream in the response. What is the ...
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1answer
87 views

Is using full TLS suite in all communication scenarios a defacto standard?

Its usually recommended that 'don't use your own system of Crypto' rather use standard SSL/TLS! I understand that SSL/TLS is a complete protocol suite that addresses all three elements of CIA triad. ...
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1answer
215 views

Understanding Secure Boot

I'm trying to understand the secure boot process of an OS but there are few points I can't wrap my head around. At a high level, afaik, secure boot ensures that the loaded OS is authenticated by its ...
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218 views

Secured data upload to Aircraft over ARINC 615A

We have a requirement for Data loading function to Aircraft. There is Avionics standard termed as ARINC 615A and ARINC 665. 615A specifies high speed Ethernet based data load operation; where POINT-TO-...
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1answer
157 views

Checking system integrity after clicking scam email link on Linux

Earlier today, my mother opened an email thinking it was from my sister-inlaw, then clicked on the shortened link. The link loaded a page of fairly nonsensical text. The source of the page had no ...
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870 views

Does python's pip provide cryptographic authentication and integrity validation?

Does python's pip package manager cryptographically validate its payload's authentication and integrity for all packages after downloading them and before installing them? I see a lot of guides ...
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1answer
83 views

Comparing two Linux system clones - what about non-regular files?

Could you please help me to understand the best approach to compare two filesystems / hard disks? As a practical learning exercise I created a clone of whole hard drive a month ago and again ...
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1answer
106 views

Practice question for Security+ that I think is wrong. Integrity vs availability

There is the following question on a practice test: Which service are you addressing by installing a RAID array and load balancer? A. Confidentiality B. Availability C. ...
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51 views

How do you securely give access to a Java App interactive console (Linux/GNU)?

I have a Java App running, which prints out messages into STDOUT and also has an active interactive console (also accepts STDIN), when the server has started up. How do I securely give access to an ...
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61 views

How to measure security level of digital signature?

I want to measure the guarantee of integrity of a digital signature. I use RSA with a 4096 bit key, and SHA 256, and a passphrase. The level of security is going to depend on these three factors, ...
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47 views

Possible to verify the integrity of AIDE itself?

I recently installed the package AIDE (Advanced Intrusion Detection Environment) on my Linux server. This is a web server installed about a year ago. Since no integrity checks have been done before on ...
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1answer
325 views

Integrity Check on power on VS. Secure boot

Can we consider the Integrity Check on power-on and the secure boot equal from security point of view? Secure boot is about allowing only a trusted SW to boot on the processor. A chain of trust can ...
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2answers
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Detecting/preventing rollback of encrypted data on a server

I need to store a frequently-changing set of encrypted data in a database. This can be encrypted and decrypted with an internal key. The data is based upon other metrics within the system, mostly the ...
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1answer
269 views

How to ensure authenticity and integrity of a directory

I want to do something similar to Ubuntu's signed checksums in distribution and I'm currently stuck on the integrity part. The tutorial here covers most of what I'd like the process to look like (I've ...
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1answer
670 views

HMAC and integrity

I'm studying network security and I found this question in my slide, but don't have an answer. Discuss the use of keyed HMACs for guaranteeing the integrity of a file being transmitted over the ...
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How can I maintain and automate a list of download URLs with known hashes? [closed]

I'm familiar with the concept of downloading a file and manually checking it against a published checksum. See How to verify the checksum of a downloaded file (pgp, sha, etc.)? and Is there a command ...
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What does jarsigner verify in the first place (integrity or authenticity)?

I was reading sth about android code signing and have run into this statement: The second jarsigner command at v in Listing 3-7 first verifies the signature block and signing certificate, ...
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583 views

Do integrity and authentication always come together?

I cannot come up with a case where there is only one of them. When there is integrity, a random person cannot modify the message without being noticed. That is, an unauthenticated user cannot modify ...
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1answer
104 views

Does Integrity assures protection from unauthorized read, without any modification?

I'm not quite sure if I understood integrity deep enough. Let's suppose that Alice and Bob are using a public-key algorithm and using signatures to assure their data integrity. A hacker was able to ...

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