Posts from the Samsung Software Membership blog

Finally, I copied my posts from the Samsung Software Membership blog. Those are not translated yet. I hope I can finish the translation someday. ๐Ÿ˜ข๐Ÿ˜ข๐Ÿ˜ข 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 -...

2022-04-26 ยท 1 min ยท RBTree

Sudoku and Nonogram with z3

์„œ๋ก  ์ด์ „์— z3์™€ Boolector๋ฅผ ๋น„๊ตํ•˜๋Š” ๊ธ€์„ ์˜ฌ๋ฆฐ ์ ์ด ์žˆ์Šต๋‹ˆ๋‹ค. (Link) ๊ทธ๋Ÿฐ๋ฐ ์ •์ž‘ z3์— ๋Œ€ํ•ด์„œ ๊ธ€์ด ์ž˜ ์—†์–ด์„œ, ์ด๋ฒˆ์— z3๋กœ ํผ์ฆ์„ ํ‘ธ๋Š” ๊ธ€์„ ์ž‘์„ฑํ•ด๋ณด๊ฒŒ...

2020-11-22 ยท 4 min ยท RBTree

SMT Solvers in CTF - z3 vs Boolector

์„œ๋ก  SMT (Satisfiability modulo theories) Solver๋Š” CTF์—์„œ ๋น ์งˆ ์ˆ˜ ์—†๋Š” ์กด์žฌ์ž…๋‹ˆ๋‹ค. SMT Solver๊ฐ€ ๋ฌด์—‡์ธ์ง€ ๊ตฌ์ฒด์ ์œผ๋กœ ์„ค๋ช…ํ•˜๊ธฐ ๋ณด๋‹ค๋Š”, ๋‹ค์Œ z3py ์˜ˆ์‹œ๋ฅผ ๋ณด๋Š” ๊ฒƒ์ด ๋” ์ง๊ด€์ ์ผ ๊ฒƒ...

2020-06-19 ยท 9 min ยท RBTree

AntiVirus Oracle

์„œ๋ก  CONFidence CTF 2020 Teaser๋ผ๋Š” ๋Œ€ํšŒ์—์„œ Angry Defender๋ผ๋Š” ๋ฌธ์ œ๊ฐ€ ๋‚˜์™”์Šต๋‹ˆ๋‹ค. ํ•ด๋‹น ๋ฌธ์ œ๋Š” Windows Defender์˜ ํŠน์„ฑ์„ ์ด์šฉํ•ด์„œ ๋ฌธ์ œ์˜ ๋‹ต์— ํ•ด๋‹นํ•˜๋Š” Fl...

2020-03-19 ยท 9 min ยท RBTree

How to build WebAssembly apps with Rust

์„œ๋ก  ์ž‘๋…„์— ๋งˆ์ž‘์—์„œ ํ˜„์žฌ ๋“ค๊ณ  ์žˆ๋Š” ํŒจ์˜ ์ ์ˆ˜ ๊ธฐ๋Œ€์น˜๋ฅผ ๊ณ„์‚ฐํ•˜๋Š” ์›น ์‚ฌ์ดํŠธ๋ฅผ ์ œ์ž‘์„ ํ•˜๋ ค๊ณ  ํ•˜๊ณ  ์žˆ์—ˆ๋Š”๋ฐ, ๋‹ค์Œ๊ณผ ๊ฐ™์€ ๋ฌธ์ œ์— ๋ถ€๋”ชํ˜”์Šต๋‹ˆ๋‹ค. ๊ฐ€๋Šฅํ•˜๋ฉด ํด๋ผ์ด์–ธํŠธ ์‚ฌ...

2020-02-19 ยท 7 min ยท RBTree