Finally, I copied my posts from the Samsung Software Membership blog. Those are not translated yet. I hope I can finish the translation someday. ๐ข๐ข๐ข Digital Signatures and Nonce Reuse Shellcoding and Bitflip Conjecture Smooth numbers and Factorization On Factoring Given Any Bits Forgery Attack on ElGamal Signatures How to build WebAssembly apps with Rust AntiVirus Oracle Singular Elliptic Curves Anomalous Elliptic Curves SMT Solvers in CTF -...
There was an interesting challenge about AES-GCM in LINE CTF 2022, called โlazy STEK.'
Iโm not gonna talk about the challenge itself. When I was solving this challenge, I realized that I did not save a script to convert between byte blocks and $\mathbb{F}_{2^{128}}$ elements in SageMath. As it is a bit confusing to understand how the conversion works, I share my script with the solution of lazy STEK here for someone struggling with this problem....
ํ๋ค์๋ ํด ๋งํ ์๋ ์๋ ํ๋ ์ผ์ด ์ ๋ง ๋ง์๋ ํด์ธ ๊ฒ ๊ฐ์ต๋๋ค. ํนํ 8์ ๋ฌ ์ฏค๋ถํฐ ์ฐ๋ฌ์์ ๊ดด๋ก์ด ์ผ์ด ๋ง์๋ ๊ฒ ๊ฐ์ต๋๋ค. ๊ดด๋ก์ด ์ผ์ด ๋ง์์ง๋ ํ์์ ์ข์ ๋ชจ์ต...
์๋ก ์ด๋ฒ ๊ธ์ ์ ๋ฒ ๋ฌ์ ๊ธ์ ์ด์ด์ pbctf 2021๋ฅผ ์ถ์ ํ๋ฉด์ ์ฌ์ฉํ ๋
ผ๋ฌธ ํ๋๋ฅผ ๋ฆฌ๋ทฐํ๋ ค๊ณ ํฉ๋๋ค. ์ด ๋
ผ๋ฌธ์ Yet Another RSA๋ผ๋ ๋ฌธ์ ๋ก ์์ฑํ๊ฒ ๋์์ต๋๋ค. ํด๋น ๋
ผ...
์๋ก 10์ ์ค์ ์ ๊ฐ ์ํ CTF ํ perfect blue์์ pbctf 2021์ ์ฃผ์ตํ์ต๋๋ค. CTF๋ฅผ ์ค๋นํ๋ฉด์ ๋ค์ํ ์ํธํ ๋
ผ๋ฌธ๋ค์ ์ฝ์ด๋ณด์๋๋ฐ, ๊ทธ ์ค์์๋ ์ฐธ๊ณ ํ ๋งํ ํฅ...