Simple Power Analysis
Simple power analysis (SPA) is a side-channel attack which involves visual examination of graphs of the current used by a device over time. Variations in power consumption occur as the device performs different operations. For example, different instructions performed by a microprocessor will have differing power consumption profiles. As a result, in a power trace from a smart card performing a DES encryption, the sixteen rounds can be seen clearly. Similarly, squaring and multiplication operations in RSA implementations can often be distinguished, enabling an adversary to compute the secret key. Even if the magnitude of the variations in power consumption are small, standard digital oscilloscopes can easily show the data-induced variations. Frequency filters and averaging functions (such as those built into oscilloscopes) are often used to filter out high-frequency components.
Read more about this topic: Power Analysis
Famous quotes containing the words simple, power and/or analysis:
“Although military, economic and political strength certainly favors the more powerful side, the matter of simple justice is a counterbalancing factor.”
—Jimmy Carter (James Earl Carter, Jr.)
“He utters substantial English thoughts in plainest English dialects.... Indeed, for fluency and skill in the use of the English tongue, he is a master unrivaled. His felicity and power of expression surpass even his special merits as historian and critic.”
—Henry David Thoreau (1817–1862)
“The spider-mind acquires a faculty of memory, and, with it, a singular skill of analysis and synthesis, taking apart and putting together in different relations the meshes of its trap. Man had in the beginning no power of analysis or synthesis approaching that of the spider, or even of the honey-bee; but he had acute sensibility to the higher forces.”
—Henry Brooks Adams (1838–1918)