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#1 2024-02-13 20:06:47
- jojo06
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- Registered: 2023-11-04
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[SOLVED]What is the danger of iso integrity ?
We are checking the iso integrity with sha and b2sum. Why its necessary and what is the danger about it ? And also is it needed for every download even with the same version ?
Last edited by jojo06 (2024-02-14 00:56:42)
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#2 2024-02-13 20:35:48
- seth
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Re: [SOLVED]What is the danger of iso integrity ?
To catch transfer errors or manipulations corrupting the image resulting in bad behavior/boot failures.
Stuff one happens to use checksums for.
You can also just ass·u·me that the image is valid and the risk of that is that it's not.
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#3 2024-02-13 20:55:45
- bybrl
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Re: [SOLVED]What is the danger of iso integrity ?
In my about... Say 6 Arch installs, I've never had to check the integrity haha.
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#4 2024-02-13 20:59:59
- jojo06
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Re: [SOLVED]What is the danger of iso integrity ?
In my about... Say 6 Arch installs, I've never had to check the integrity haha.
Im heading to 10 its 7-8 used 3 times in the last one.. did not 
@seth
I can assume because the same version i checked ? Or do you know its okay ? It can hurt my system by manipulated image such as rat/botnet ? Is it rarely happening or sometimes ?
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#5 2024-02-13 21:10:51
- seth
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Re: [SOLVED]What is the danger of iso integrity ?
You want to check every file you downloaded *once* - if you dd the same local file a dozen times on a usb key you don't have to check it before every single dd.
I've never faced a bogus checksum, it's precaution and good practice - not a frequent threat. At least not in civil democracies 
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#6 2024-02-13 23:14:10
- jojo06
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Re: [SOLVED]What is the danger of iso integrity ?
"At least not in civil democracies" sorry did not get one.
I mean, i downloaded yesterday and today again. Did not use dd in both. I used popsicle and in second i used rufus. Checked yesterday but today i did not.
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#7 2024-02-13 23:49:54
- seth
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Re: [SOLVED]What is the danger of iso integrity ?
What you're using to write the image is irrelevant.
https://en.wikipedia.org/wiki/File_verification
https://en.wikipedia.org/wiki/Man-in-the-middle_attack
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