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So, recently when downloading an update, I saw the option that stated:
'Download and verify the file SHA-256 checksum.'.
My question(s):
What is the purpose of this?
How is it beneficial(if question 1 doesn't answer this) ?
Who would need to make use of this ?
Can you point me to some literature in this regard ?
Thanks.
The purpose is to ensure the integrity of the file arrived exactly as it was intended.
2 reasons I am aware of:
A) file was not corrupt in transit,
B) file was not intercepted and modified in transit, having said that if someone is able to modify the download in transit then modifying the checksum in transit should not be a problem for them either.
Only situation I can imagine B would be useful is if the downloads are transmitted over HTTP whereas the SHA has was delivered over HTTPS.
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I checked the DNS records on the digwebinterface.com/?hostnames=mydomain.com&type=TXT&ns=resolver&useresolver=8.8.4.4&nameservers=
The Dig shows two TXT records but but I don't have the first record: (ca3-0158c3e5584b4fdba369cf3efeb6c56a)
Dig shows:
mydomain.com#8.8.4.4 (Default):
mydomain.com. 299 IN TXT "ca3-0158c3e5584b4fdba369cf3efeb6c56a"
mydomain.com. 299 IN TXT "v=spf1 redirect=_spf.yandex.net"
This web site is on the CloudFlare. DNS records: http://prntscr.com/r2m9ln
What can be reason and how can I solve this issue?
the mentioned TXT record which starts with "ca3-" is a CloudFlare internal record which they use for TLS validation. I guess since they need it to make their services available to you, there is no chance to delete it.
There is several posts inside the CloudFlare community about it: https://community.cloudflare.com/t/unable-to-see-and-remove-txt-record/44179/5
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As I'm using a windows 7.We are configured public ip to access our apache server. After a Remote desktop connection via Anydesk Ended. All the Files in System are encrypted with .deep extension. Every Folder Contains Text files that has id and mrdeep#protonmail.com and bitcoin donate information and also system already has K7 AntiSecurity(Licensed but about to end).But after affected, K7 automatically vanished. Hence can anyone help me to recover those files and also guide me to escape from such viruses in future..
it looks that this is Scarab ransomware new version. Scarab has decryption tool developed by Dr. Web. You should try that, it may work for this .deep extension or just use anti-malware tools, clean everything. Then maybe Data Recovery Pro will help with data decryption. Keep your anti-virus and anti-malware up-to-date so you can avoid this nasty virus. These most commonly come from infected spam email attachments. so clean that box more often and scan your system more frequently. Good luck!
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They both seems to store files in a decentralized network. So what's the difference between them in terms of data structure and algorithms they use? And also what's the difference between them in terms of use cases?
If I store a file in IPFS or Filecoin, will it remain there forever or it may get lost?
IPFS does storage and content-based addressing. Filecoin is just a way to incentivize people to store IPFS content.
So it's not really easy to tell the difference because they are not comparable. Filecoin just works on top of IPFS.
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This time i'm going to participate in Google CodeJam for the first time.. I don't know how to submit a output and i cant understand the guidelines please help me.
I tried to upload a text file containing the answers for small input but it won't accept
You can ask for assistance from the CodeJam administrators. Post your query on the CodeJam forum they can guide you well. Plus the response time is also pretty good.
Secondly you mentioned that your text file was not accepted. In that case, what was the error?
I know, it is late, but for the next codejam and other coding competitions -
If you are using bash, then run this on terminal, [assuming the input file has name input.in and your code reads everything from stdin and prints everything on stdout]
./myCode < input.in > output.out
and then upload the output.out file.
** For more details, search for I/O redirection on bash.
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How can I prove that images were stolen from a website?
Is there any way to check from when an another website have the same images? I have no any access to the server.
Thanks for any idea!
UPDATE:
No, I'm not the one who forgot watermark. An old client of mine just found me with this question. Actually found Google cached page which we can use, but still interested if any other solution is exist. Like any image format contains any date attribute in it?
If you're using a Unix-based operating system, you might have access to cURL. Try running
curl --remote-time --remote-name http://url-to-your-image/
and see if you get a timestamp that is different from the exact time you downloaded the file. Not all servers respond with the time, but it might be worth an attempt.
But generally, if it's your original work, then you should have a copy of the image with higher resolution and/or lower compression rate, right? That should be enough to prove which of the images is the stolen one. Intellectual property rights on the Internet is a mess, though, for several reasons. But even if you can't take legal actions, you might have better luck convincing an administrator to remove the content.