Browsing by Author "Vainio, Johannes"

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  • Physically Unclonable Functions as Trust Anchors for Connected Embedded Device Security
    (2018-06-19) Vainio, Johannes
     Perustieteiden korkeakoulu | Master's thesis
    Physically Unclonable Functions (PUF) carry promise for solving some of the current problems in current embedded device security. Devices are often deployed in unmonitored areas accessed over the untrusted public internet. Confidential communications require secrets on the device, but simple persistent memory can easily be read during transit from a factory to the deployment by untrusted personnel. A PUF can be thought of as a mechanism for extracting deterministic randomness from something that cannot be copied or cloned. In this thesis, we design, implement and evaluate an FPGA PUF that can produce an estimated 250 bits of physically unclonable, reliable entropy from measuring slight variations in ring oscillator frequencies deployed on the FPGA fabric. The frequency variations result from submicroscopic silicon chip manufacturing variations that lie below manufacturing tolerances and cannot thus be copied. The PUF can be used as a device trust anchor, providing a stable basis for various cryptosystems, in turn making it possible to authenticate devices and initiate encrypted channels without any “leaps of faith” in trusting unknown key fingerprints at first sight.
  • Sidosryhmien johtaminen megaprojekteissa
    (2015-12-17) Vainio, Johannes
     Perustieteiden korkeakoulu | Bachelor's thesis