Hello and welcome to #NakedDieFriday! This time with proper capitalisation. :-)

The die of today is named HD6483153 and is designed by Hitachi. It fell out of a SIM card. I do not know what commercial p/n this is, if it was ever assigned one. If anyone can provide any details on what smart cards were made by Hitachi, please do so! In the meantime, we shall explore a bit. 🧵

Full-res map: http://infosecdj.net/map/hitachi/hd6483153/infosecdj_mz_nikpa40x_2/

EDIT: This is H8/3153, part of the H8/3150 series.

#electronics #reverseengineering #smartcards

Level up your security game! 🛡️ Learn about smart cards, passkeys, and TOTP – plus how to keep those seeds safe with a YubiKey. It's more than just a password, folks! Check it out. #SmartCards #MFA #Cybersecurity

https://www.youtube.com/watch?v=W0cq32riYYA

Hello, wonderful people. Taking a break is good, so I am taking a couple moments to write the #nakeddiefriday post of the week.

Today we have this interesting sample. Yes, it has certainly seen better days; been sitting in a queue for a real while now. This is again a smartcard chip without a name to it. I believe this to be fabbed by Samsung, and be rather old. The chip is built using poly-gate CMOS with 3 metal layers; later processes moved to a higher layer count.

#electronics #smartcards #reverseengineering

#Newsboat und #Wallabag - Mehrere Smart Cards und unterschiedliche Betriebssystem verwenden

Newsboat kann über die API Artikel direkt an Wallabag senden. Dort können die Beiträge bequem und übersichtlich verwaltet, mit Tags versehen und im Webbrowser oder der Wallabag-Apps auf allen Endgeräten gelesen werden.

In diesem Beitrag werden mehrere Clients und #Smartcards (#YubiKey und #Nitrokey) verwendet, um interessante Artikel an die zentrale Wallabag-Instanz senden.

https://strobelstefan.de/blog/2026/03/08/newsboat_und_wallabag_-_mehrere_smart_cards_und_unterschiedliche_betriebssystem_verwenden.html

Does anybody know what elementary file 2FE4 contain on SIM cards? It doesn't look like it is described in any standards I've looked at, and its contents varies widely across cards. Maybe boost for reach?

#electronics #smartcards

Hello! It's #nakeddiefriday today, and what I got for you is yet another smartcard chip. Please welcome an unnamed die marked K2D0A, fabbed by STMicro. This came from [REDACTED], used to [REDACTED]. The die oriented with power supply pads on top, so it's possible to figure out which die pads correspond to which module pads. Unusually enough, there are 6 pads bonded out; the function of the extra
pad is not known at this time-- certainly not VPP.

A short thread follows.

#electronics #reverseengineering #smartcards