Tyojan

Ph.D. student in security
Cryptanalysis & FPGA development

[suzaki @KuniSuzaki]

昨日BlackHat Asia 2026で発表したスライドが公式HPから公開されました。
Breaking the Illusion of Key Zeroization: How OS, Libraries, and HardwareKeep Your AES Keys Alive
https://t.co/u2D0MifsbL
FPGAで実装したPeriodic-AESKeyfingerのオープンソースURLもついています。
オープンソースで公開している

[Tyojan @_Tyojan]

📣 Our talk at Black Hat Asia 2026:
Zeroizing cryptographic keys is harder than you think.
Interactions across apps, libs, OS, and hardware can break zeroization.
Using an FPGA, we observe memory and show AES keys persist.
📅 April 23, 2:30 PM
https://t.co/z7wgDhaCdG
#BHASIA

[Black Hat @BlackHatEvents]

BLACK HAT ASIA SPEAKER SPOTLIGHT SERIES 💡
Meet Toyofumi Sawa @_Tyojan, Ph.D. candidate at the Institute of Information Security (Japan), as he answers three key questions in our latest Spotlight video:

👉 What are you most excited about for Black Hat Asia 2026?

👉 What will your session focus on?

👉 What’s one key insight or takeaway attendees can expect?

Catch his Black Hat Asia Briefing, “Breaking the Illusion of Key Zeroization: How OS, Libraries, and Hardware Keep Your AES Keys Alive,” where he uncovers why cryptographic keys often persist in memory despite zeroization—and what this means for real-world system security. 🔐⚠️

Don’t miss his deep dive into key persistence, system-level behavior, and cryptographic risk: https://t.co/CNo5Lin6km

#BHASIA #Cybersecurity #Cryptography #SystemSecurity #MemoryForensics

[Black Hat @BlackHatEvents]

BLACK HAT ASIA SPEAKER SPOTLIGHT SERIES 💡
Meet Toyofumi Sawa @_Tyojan, Ph.D. candidate at the Institute of Information Security (Japan), as he answers three key questions in our latest Spotlight video:

👉 What are you most excited about for Black Hat Asia 2026?

👉 What will your session focus on?

👉 What’s one key insight or takeaway attendees can expect?

Catch his Black Hat Asia Briefing, “Breaking the Illusion of Key Zeroization: How OS, Libraries, and Hardware Keep Your AES Keys Alive,” where he uncovers why cryptographic keys often persist in memory despite zeroization—and what this means for real-world system security. 🔐⚠️

Don’t miss his deep dive into key persistence, system-level behavior, and cryptographic risk: https://t.co/CNo5Lin6km

#BHASIA #Cybersecurity #Cryptography #SystemSecurity #MemoryForensics

[Tyojan @_Tyojan]

Black Hat Asia 2026採択を機にTwitterを始めました。よろしくお願いします！！
I’ve started using X as part of my participation in Black Hat Asia 2026. I’ll be presenting my research on AES key persistence and memory forensics using FPGA. Nice to meet you all!
#BHASIA