A Chemical Memory Snapshot
نویسنده
چکیده
Smart cards and embedded systems are part of everyday life. A lot of them contain sensitive data like keys used in secure applications. These keys have to be transferred from non-volatile to static memory to generate signatures or encrypt data. Hence, the possibility to read out the static memory of a device is a crucial security threat. This paper presents a new technique to read out secret data from the internal static memory of a cryptographic device. A chemical reaction of the top metal layer of a decapsulated chip is used to identify lines connected to the positive power supply. Using this information, we are able to obtain the content of memory cells like the secret key of a cryptographic system.
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