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Posts Tagged ‘entropy’

Google Wallet PINs easily stolen from rooted devices

10
Feb
2012

Joshua Rubin, a security engineer with zvelo, disclosed his research into the (in)security of Google Wallet. Google Wallet is a new near field communication (NFC) electronic wallet that allows customers to pay for everyday purchases by entering a PIN on their Android smartphone and tapping it on a receiver, similar to Mastercard PayPass.What Rubin discovered […]

Category General Written by Naked Security - Sophos 0 Comments

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Add Bottom Up Randomization To (Your Own) Source Code

30
Sep
2011

EMET’s new Bottom Up Randomization spectacularly increased the entropy of DLL’s base addresses loaded into my test program. Instead of 15 different addresses, I had more than 200.Matt Miller told me how he implemented Bottom Up Randomization: “It works by reserving a random number (between [0,256]) of 64K regions via VirtualAlloc. This has the effect […]

Category Security Written by Didier Stevens 0 Comments

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