In RSA Key Extraction via Low-Bandwidth Acoustic Cryptanalysis [PDF], a paper by Daniel Genkin and Eran Tromer of Tel Aviv University and Adi Shamir, the authors show that a sensitive microphone (such as the one in a compromised mobile phone) can be used to infer a secret cryptographic key being used by a nearby computer. The computer's processor emits different quiet sounds ("coil whine...caused by voltage regulation circuits") as it performs cryptographic operations, and these sounds, properly analyzed, can reveal the key.
It's a pretty stunning attack, the sort of thing that sounds like science fiction. But the researchers are unimpeachable (Shamir is the "S" in RSA), and their paper is very clear.
The techniques they demonstrated certainly aren't viable for casual attacks. Still, as Wednesday's updates from GnuPG attest, they represent a realistic threat for people who use cryptographic software and devices in certain settings. The researchers outline several countermeasures application developers can implement to prevent computers from leaking the secret keys in acoustic emanations, namely a technique known as RSA ciphertext randomization. People who rely on cryptography applications should check with the developers to make sure they're not susceptible. In the meantime, end users shouldn't assume that running a computer in a noisy environment will prevent attacks from working, since acoustic emanations that leak secret keys can often be filtered.
New attack steals e-mail decryption keys by capturing computer sounds [Dan Goodin/Ars Technica]
Gabriella Coleman is the “hacker anthropologist” whose book on the anthropology of Anonymous is among the best books on hacking I’ve ever read; her new paper in Current Anthropology, From Internet Farming to Weapons of the Geek, poses a fascinating question: given that hackers are as well-paid and privileged as doctors, lawyers and academics, how […]
Mr Robot is the most successful example of a small but fast-growing genre of “techno-realist” media, where the focus is on realistic portrayals of hackers, information security, surveillance and privacy, and it represents a huge reversal on the usual portrayal of hackers and computers as convenient plot elements whose details can be finessed to meet […]
The unprecedented denial-of-service attacks powered by the Mirai Internet of Things worm have harnessed crappy, no-name CCTVs, PVRs, and routers to launch unstoppable floods of internet noise, but it’s not just faceless Chinese businesses that crank out containerloads of vulnerable, defective-by-design gear — it’s also name brands like Sony.
The Boing Boing Store’s Gift Guide is full of ideas for pretty much anyone in your life like hipster ice cub trays, Xbox controllers, Halo Boards, and even diamond necklaces. As always, all products in the Boing Boing Store come at great discounts, too. Shop by price bucket starting at under $20. Under $20:Bloxx Jumbo Ice Trays […]
Unlike traditional lighters, the SaberLight features an electronic plasma beam that’s both rechargeable and butane-free. This sleek lighter is even approved by TSA, so you’ll never be stuck buying lighters you’ll just have to throw away partially used. For some people, like me, this is a pretty big game-changer. The SaberLight’s beam is actually both hotter and cleaner […]
Holiday shopping is in full swing, and the Striiv Touch is one of the best gift ideas I’ve landed on. Its simple design works for females and males, and its wide range of features makes it suitable for even the non-fitness enthusiasts in your life.Unlike traditional fitness trackers, the Striiv Touch also acts as a smartwatch. It […]