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by DanielC
Fri Aug 12, 2011 8:55 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0936: "Password Strength"
Replies: 893
Views: 317489

Re: 0936: "Password Strength"

Spoe wrote:
DanielC wrote:How do you figure that MD5 hashes consume 16^32 bytes of storage? Each hash requires 16 bytes to store (32 if you store it as ASCII hex) and there are 2^160 possible MD5 hashes.


Just a minor quibble: 2^128. 2^160 is (most commonly) SHA-1 in context of hashes.


Indeed. I mistyped.
by DanielC
Fri Aug 12, 2011 5:12 pm UTC
Forum: Individual XKCD Comic Threads
Topic: 0936: "Password Strength"
Replies: 893
Views: 317489

Re: 0936: "Password Strength"

Each MD5 hash is comprised of exactly 16 bytes stored as a 32 plain text character string. Therefore the hash can only contain 0-9 and a-f This is just a choice of representation. There is absolutely nothing fundamental about 0-9, a-f. It is popular to represent hashes as hexadecimal values, but if...

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