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ioonag.bsky.social

@ioonag.bsky.social
55 followers 52 following 5 posts
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ioonag.bsky.social @ioonag.bsky.social · 04/06/2026
Just ranked 2nd in SSTIC 2026 security challenge! 🏆️ www.sstic.org/2026/challen... My write-up is now live 📝 github.com/fishilico/ss...
Screenshot of a remote terminal titled "weapon auth supervisor" with some messages related to Shadow stack mechanism.
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ioonag.bsky.social @ioonag.bsky.social · 21/01/2026
Last December I solved @synacktiv.com 2025 Winter Challenge: Quinindrome bsky.app/profile/syna... . Here is a 81-byte Linux program which is both a quine (it prints itself when executed) and a palindrome (it is symmetrical)! To learn how I achieved it: github.com/fishilico/sy...
Screenshot of a terminal with a hexadecimal dump of a 81-byte Quinindrome:

$ ./solution_3_minimal.bin | xxd
00000000: 7f45 4c46 80cd 584b 80cd 51b2 4508 e1c1  .ELF..XK..Q.E...
00000010: 0200 0300 b904 0443 3900 0300 2c00 0000  .......C9...,...
00000020: 2c00 0000 0100 205e 5f5e 2000 0100 0000  ,..... ^_^ .....
00000030: 2c00 0000 2c00 0300 3943 0404 b900 0300  ,...,...9C......
00000040: 02c1 e108 45b2 51cd 804b 58cd 8046 4c45  ....E.Q..KX..FLE
00000050: 7f
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ioonag.bsky.social @ioonag.bsky.social · 07/01/2026
libsodium 1.0.21 was released yesterday 🎉 github.com/jedisct1/lib... It fixes a small issue I found, showing how hard it is to write C code: github.com/jedisct1/lib... (fixed by github.com/jedisct1/lib... and github.com/jedisct1/lib...)
github.com
Release 1.0.21 · jedisct1/libsodium
Version 1.0.21 This point release includes all the changes from 1.0.20-stable, which include a security fix for the crypto_core_ed25519_is_valid_point() function, as well as two new sets of functio...
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ioonag.bsky.social @ioonag.bsky.social · 18/09/2025
This summer @synacktiv.com organized an interesting challenge: the aim was to craft a container image as small as possible which replicated itself (i.e. an OCI Image Quine), bsky.app/profile/syna.... I am now publishing a write-up of what I did (Rust/asm/code golfing/...): github.com/fishilico/sy...
github.com
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ioonag.bsky.social @ioonag.bsky.social · 05/02/2025
After finishing in the top 3 of ZK Hack V competition, I got interviewed with the two other winners. The replay is available on www.youtube.com/watch?v=gLy0... The competition consisted in solving 3 puzzles involving vulnerabilities in Zero-Knowledge systems. More details on zkhack.dev/zkhackV/
youtube.com
ZK Hack V Winners Interview
YouTube video by ZK Hack
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