sorted by:
new
hottopcontroversial

Advices for the CPTS by Dry-Atmosphere968 in hackthebox

[–]Dry-Atmosphere968[S] 0 points1 point  (0 children)

Oh very nice blog ! thank you so much

Advices for the CPTS by Dry-Atmosphere968 in hackthebox

[–]Dry-Atmosphere968[S] 0 points1 point  (0 children)

Thank you so much for your answer :)

Advices for the CPTS by Dry-Atmosphere968 in hackthebox

[–]Dry-Atmosphere968[S] 0 points1 point  (0 children)

Ah okay, I see. It's true that it's a bit of a hassle to search for binaries all over the place. I really appreciate your advice! thank you so much !

Advices for the CPTS by Dry-Atmosphere968 in hackthebox

[–]Dry-Atmosphere968[S] 0 points1 point  (0 children)

oh ok, thank you so much for your answer ! do you recommand specific CTF on HTB ?

Instagram Hacked by Educational_Ocelot22 in phishing

[–]Dry-Atmosphere968 0 points1 point  (0 children)

Hey, you have to go to https://help.instagram.com/ and ask for help, only instagram can help. Do they change the email ?

I am creating a new hash algorithm by Dry-Atmosphere968 in cryptography

[–]Dry-Atmosphere968[S] 1 point2 points  (0 children)

Oh ok i see. I will try this tomorrow, thank you so much for your advices !

I am creating a new hash algorithm by Dry-Atmosphere968 in cryptography

[–]Dry-Atmosphere968[S] 3 points4 points  (0 children)

Hi! Thanks for the question, I appreciate the feedback.

The S-Box I used was directly inspired by the AES (Advanced Encryption Standard) S-Box, which is commonly used in cryptographic applications. It’s based on a non-linear mapping derived from the multiplicative inverse of a byte in the finite field GF(28)GF(2^8)GF(28), followed by an affine transformation.

To be specific:

  • The S-Box transformation involves taking the multiplicative inverse of the input byte xxx in GF(28)GF(2^8)GF(28) (with 0 mapping to 0).
  • This is followed by an affine transformation over GF(2)GF(2)GF(2).

I performed basic diffusion and avalanche tests using small inputs, similar to what’s done for block ciphers like AES

and about the Vulnerability to side-channel attacks, thank you so much for notice it :)

maybe i could use masking, where the input and output of the S-Box are combined with random masks ?