The whole anonymization of IP addresses by just hashing the date and IP is just security theater.
Cryptographic hashes are designed to be fast. You can do 6 billion md5 hashes in a second on an MacBook (m1 pro) via hashcat and there’s only 4 billion ipv4 addresses. So you can brute force the entire range and find the IP address. Basically reverse the hash.
And that’s true even if they used something secure like SHA-256 instead of broken MD5
Cryptographic hashes are designed to be fast. You can do 6 billion md5 hashes in a second on an MacBook (m1 pro) via hashcat and there’s only 4 billion ipv4 addresses. So you can brute force the entire range and find the IP address. Basically reverse the hash.
And that’s true even if they used something secure like SHA-256 instead of broken MD5