While it is not yet (to my knowledge) known to be ‘broken’ as some other functions – notable SHA1 and MD5 are. This is probably the most ‘minimally secure’ modern hashing function. In our demonstration we show the example to be defaulting to use the SHA256 hashing function. It is called Hashlib and it contains the features necessary to allow you to generate hashes in a few modern algorithms. While you can get libraries to support using just about any common hashing algorithm in Python today we will focus on the use of a particular library which comes built in. Only that one input will produce that particular output – and guessing ‘close’ to the right password will be indistinguishable from guessing incredibly ‘far’ from the right password. This is why in an offline password attack – a hacker will guess many passwords via “brute force” – putting those passwords into the function and checking to see if they get the target output. The only way to learn what the input ever was – is to guess the exact same input again. This means that you cannot infer anything about the input by looking at the produced output.
But changing even one bit of the input should produce a completely new and random looking output. The output is deterministic – meaning that if you put the same inputs in again you will get the same output. This function will algorithmically produce an output that is completely indistinguishable from the input. In short, when we ‘hash’ a password we are taking that plaintext password (and some additional data – usually a salt or pepper) and passing all this to a hashing function. Here is a good post that goes deeper on the subject of hashing. Though if you’re looking for more on this subject I recommend a more in depth study. I’ll touch on this very briefly for anyone who might need a quick refresher. As always, if you have questions please reach out to me on Twitter ( What is “Password Hashing”?
#Remembear salted hash code
We will discuss how exactly a password can be hashed, and give some examples of the code that can be used to do this. This post will briefly detail a basic password hashing mechanism written in Python.
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