Edit - Cryptography Stack Exchange

You are not logged in. Your edit will be placed in a queue until it is peer reviewed.

We welcome edits that make the post easier to understand and more valuable for readers. Because community members review edits, please try to make the post substantially better than how you found it, for example, by fixing grammar or adding additional resources and hyperlinks.

Required fields*

Rev

$\begingroup$ You say about Merkle–Damgård constructions, does the same applies to Merkle tree based hash functions? $\endgroup$

phantomcraft
– phantomcraft

2022-10-19 01:54:04 +00:00
Commented Oct 19, 2022 at 1:54
$\begingroup$ @phantomcraft: It think the situation with a Merkle tree based hash is in between that for a Merkle–Damgård hash $H(S\mathbin\|\mathtt{00})\mathbin\|H(S\mathbin\|\mathtt{01})\mathbin\|H(S\mathbin\|\mathtt{02})\mathbin\|H(S\mathbin\|\mathtt{03})\mathbin\|\ldots$ (minimum entropy, potentialy down to the hash size) and $H(\mathtt{00}\mathbin\|S)\mathbin\|H(\mathtt{01}\mathbin\|S)\mathbin\|H(\mathtt{02}\mathbin\|S)\mathbin\|H(\mathtt{03}\mathbin\|S)\mathbin\|\ldots$ (maximum entropy, near the output width). $\endgroup$

fgrieu
– fgrieu ♦

2022-10-19 05:44:19 +00:00
Commented Oct 19, 2022 at 5:44
$\begingroup$ And about H(H(F) || 00) || H(H(F) || 01) || H(H(F) || 02) || H(H(F) || 03) || .. ? How does it compare to H(00||S) || H(01||S) || H(02||S) || H(03||S) || ... ? -- If I use H(00||S) || H(01||S) || H(02||S) || H(03||S) || ... instead of H(S||00) || H(S||01) || H(S||02) || H(S||03) || ..., the answer to my question would be "yes"? $\endgroup$

phantomcraft
– phantomcraft

2022-11-23 23:18:20 +00:00
Commented Nov 23, 2022 at 23:18

Add a comment |

Correct minor typos or mistakes
Clarify meaning without changing it
Add related resources or links
Always respect the author’s intent
Don’t use edits to reply to the author

create code fences with backticks ` or tildes ~
```
like so
```
add language identifier to highlight code
```python
def function(foo):
print(foo)
```
put returns between paragraphs
for linebreak add 2 spaces at end
_italic_ or **bold**
quote by placing > at start of line
to make links (use https whenever possible)

<https://example.com>

[example](https://example.com)

<a href="https://example.com">example</a>
MathJax equations $\sin^2 \theta$

formatting help »
answering help »

MathJax help »