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Find out more in the article Crime scene evidence. 2. Extract the DNA DNA is contained within the nucleus of cells. Chemicals are added to break open the cells, extract the DNA and isolate it from other cell components. 3. Copy the DNA Often only small amounts of DNA are available for forensic analysis so the STRs at each genetic locus are copied many times using the polymerase chain reaction (PCR) to get enough DNA to make a profile. Find out more in the article What is PCR? Specific primers are used during PCR that attach a fluorescent tag to the copied STRs. 4. Determine the size of the STRs The size of the STRs at each genetic locus is determined using a genetic analyser. The genetic analyser separates the copied DNA by gel electrophoresis and can detect the fluorescent dye on each STR. This is the same piece of equipment used in the lab for DNA sequencing. 5. Is there a match? The number of times a nucleotide sequence is repeated in each STR can be calculated from the size of the STRs.

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With hackers deploying sophisticated attacks against operating systems, processors, and even firmware, manufacturers have increasingly turned to a tamper-resistant processor—or part of one— often called a "secure enclave" to stymie all sorts of attacks. They place in that immutable chip the "root of trust" on a device, relying on it to run cryptographic checks every time the system starts to make sure nothing has been subtly, maliciously altered. If something is wrong, the secure enclave stops the machine from booting up. Which leads to a nagging question: How can you always be sure that you can trust the secure enclave itself? It's not a hypothetical. While secure root of trust schemes offer real security improvements in many ways, researchers have repeatedly shown that it can be possible to undermine those chips. Which is why Google and a consortium of companies, nonprofits, and academic institutions have all signed on to an initiative meant to improve the transparency—and ultimately the security—of secure enclaves.

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July 21, 2021, 12:20 pm