Collaborate Disseminate
So I am supposed to create a UDP server that is supposed to verify the checksums of packets being sent, and then log failures.
The packets have the structure of:
4 bytes – Packet ID
4 bytes – Packet Sequence # (Total Chec… Continue reading Verify Checksum of a UDP Packet [closed]
Back in the day, retail software was shipped on physical CDs that often had a printed “CD key” label affixed. The (usually alphanumeric) key on the label was unique to that particular copy of the product, and it needed to be … Continue reading Were software "CD key" schemes backdoored or simply misdesigned?
By David Balaban
VPN is a wonderful thing that you all have probably heard about. I assume it was something like this: “Using a VPN you can visit websites blocked by state services and engage in any network activity without fear of revealing your actua… Continue reading Understanding VPN through open systems interconnection model
Say I have some Apache logs that show brute force attempts on a login page. I’ve singled out the IP, and found out who the culprit was. How can I show to a third party that I didn’t makeup the entries in those logs?
Is there… Continue reading Prove log files weren’t tampered with?
This question already has an answer here:
Does hashing a file from an unsigned website give a false sense of security?
11 answers
Recently there have been quite some discussions about the security approach of ProtonMail. Since it do crypto stuff at client-side, loading the javascript code in the user’s browser, as far as i know, even if that code is pub… Continue reading Deploy verifiable webapp source code
For my work I’ll need to provide my customer a specific file which will be the result of the work I have done for them.
To protect the integrity of the work I have done and to guarantee it has never been modified, I intend to add a checksu… Continue reading Which hashing algorithm shoud I use for a safe file checksum?
This question already has an answer here:
Does hashing a file from an unsigned website give a false sense of security?
11 answers
… Continue reading Why verify a file / firmware downloaded online against a checksum? [duplicate]
I saw a few website APIs that use a checksum as a GET parameter.
For example:
http://api.test.com/get/?people=fathers&view=all&hash={28 character Base64-like string}.
The hash relies on all of the GET parameters, ch… Continue reading Standard ways that sites use Base64 hash/checksum for security/authorization
What are similarities and differences between a “checksum” algorithm and a “hash” function?
Can they be used instead of each other? Or their usage are different?
For example, for verifying the integrity of a text, which one is better to… Continue reading Checksum vs. Hash: Differences and Similarities?