October 2021
Intermediate to advanced
462 pages
16h 18m
English
© Antishock/Shutterstock
SOME PEOPLE WHO HAD SIGNED UP ON the social media site FriendFinder™ were uncomfortably surprised when they learned of a security breach in which hackers stole data from multiple databases that included their names, passwords, email addresses, and other information. The hackers identified a flaw in a cryptographic function that takes an input and produces a value known as a message digest using a technique called hashing. FriendFinder had used the weak SHA-1 hashing algorithm with a Local File Inclusion (LFI) vulnerability. Some scripting languages such as PHP allow files ...
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