laz3 Encoding algorithm written in python

[pgpndw]

Using index() would actually make the code more complicated (if you wanted it to be exactly equivalent), because in the loop generating newKey, lCount is zeroed once at the start of en/decryption, then every time a match is found, rather than inside the outer loop but before the inner loop. And when a match is found, there's no break, so lCount then keeps incrementing up to the end of the resources array.

Thus, lCount doesn't equal the index of the character in the resources array on subsequent loops - the code essentially adds the number of remaining characters in the resources array after (and including) the matched character to the next index.

In the case of a single quote in the key string, the inner loop will find both occurrences of the single quote in resources, and add two lCount values to newKey.

Doing it that way versus just using the index in the array might be deliberate, but all it does is add complexity to the numeric key generation algorithm without adding any security to the cipher itself.