Fixing typo in 09-04-Testing_for_Weak_Encryption

[Bankde]

This PR covers issue #.

• [x] This PR handles the issue and requires no additional PRs.
• [x] You have validated the need for this change.

What did this PR accomplish?

fix the typo in content.

Thank you for your contribution!

[kingthorin]

https://dictionary.cambridge.org/dictionary/english/asymmetric

[Bankde]

Hi, the ECB is generally referred to "symmetric encryption", not asymmetric. Right now it's like saying RSA should not be used for symmetric encryption. It is not meaningful.

https://book.hacktricks.xyz/crypto-and-stego/electronic-code-book-ecb

(ECB) Electronic Code Book - symmetric encryption scheme

Edited a bit since it's possible to invent asymmetric ECB if you really want one.

[rbsec]

This PR fixes a mistake in the content (which is good), but also introduces a bit of a grammatical error, as "in a symmetric encryption" isn't really a complete sentence. And leads to the confusion about whether that should be "a symmetric" or "asymmetric".

How about we just cut the sentence short and say ...is not suggested for use. or generally should not be used. - because there's really very few cases where you should be using ECB at all, regardless of whether you're trying to do symmetric or some kind of weird asymmetric version of it?

[Bankde]

@rbsec thank you for the review. I agree with the better change.

[kingthorin]

Thank you both!

[rbsec]

There's definitely a crypto-related version of the four candles/fork handles sketch to be made out of this.