Brian Greenberg 
@brian_greenberg@infosec.exchange
CIO by day, cybersecurity professor & Forbes Contributor by night, and a firm believer that the best ideas start with good coffee. I’m passionate about using AI, cloud tech, and leveraging system dynamics to make work (and life) a little easier. Outside of work, I’m either reading/writing in some indie coffee house, hiking shady trails along the river, or adding to my ever-growing collection of houseplants. I’m always learning, always leading, and always up for a good book or a new coffee house to explore. #CyberSecurity #systemstheory #hiking #philosophy #actor #improviser #storyteller #coffee house addict 📍Chicago, IL 🦋🥾☕️🎭🤖🪴✍️
infosec.exchange
Brian Greenberg
@brian_greenberg@infosec.exchange
CIO by day, cybersecurity professor & Forbes Contributor by night, and a firm believer that the best ideas start with good coffee. I’m passionate about using AI, cloud tech, and leveraging system dynamics to make work (and life) a little easier. Outside of work, I’m either reading/writing in some indie coffee house, hiking shady trails along the river, or adding to my ever-growing collection of houseplants. I’m always learning, always leading, and always up for a good book or a new coffee house to explore. #CyberSecurity #systemstheory #hiking #philosophy #actor #improviser #storyteller #coffee house addict 📍Chicago, IL 🦋🥾☕️🎭🤖🪴✍️
infosec.exchange
@brian_greenberg@infosec.exchange
·
3d ago
Trying to be secure... You deleted the app. You turned on disappearing messages. You did everything right. The FBI can still read your Signal messages.
Huh? This wasn't a Signal failure. Signal did its job. iOS didn't. The phone was storing notification previews in a database long after the app was gone, because someone turned on Lock Screen message previews. Apple just patched it in iOS 26.4.2, and they only found out about it because a defendant's court case exposed it during testimony.
🔎 This is why privacy promises and privacy architecture are two different things
📲 Update your phone. Not because you're hiding something. Because your phone is quietly keeping receipts you don't know about.
⚠️ And if you're a CISO still telling employees that "just use Signal" is a complete privacy answer, it's time to revisit that conversation.
https://www.macrumors.com/2026/04/22/ios-26-4-2-notification-database-security-fix/
#Cybersecurity #Privacy #iOS #InfoSec #Leadership #security #cloud #infosec #AlwaysUpdate
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