I’m just wondering, is there a reason why some libraries (be it any language) use iterative hashing such that the hashed data is encoded in hex and rehashed again instead of rehashing the actual binary output?
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I’m just wondering, is there a reason why some libraries (be it any language) use iterative hashing such that the hashed data is encoded in hex and rehashed again instead of rehashing the actual binary output?
Read this page and especially the sections at the end about iterative hashing and double hashing http://hungred.com/useful-information/enhance-security-hash-function-web-development/
I guess a tl;dr version of the sections would be the sentence at the end saying: “Therefore, try avoiding double hashing and go for iterative hashing instead. Furthermore, hashing two times with the same algorithm is considered suboptimal.”