ACRSES – Advanced Cryptography on a Resource Scarce Embedded System
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Typ
Examensarbete på grundnivå
Program
Mekatronik 180 hp (högskoleingenjör)
Publicerad
2023
Författare
Svensson, Jonatan
Karlsson, Anders
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
This degree project aims to explore how a advanced cryptography can be applied on
a resource scarce system. Specifically, the targeted system is a Raspberry Pi Pico
and the advanced cryptography method is AES. Open-source AES implementations
were used to achieve encryption, decryption and CMAC verification. Various tests
cases were constructed to investigate the Raspberry Pi Pico’s performance under
these test cases. The performance of the system was analysed by extracting data
about the execution time.
The data conclusively described a linear and predictable behaviour both when encrypting
and decrypting 16 bytes thousands of times; when encrypting 4096 bytes;
and when the encryption functions were interrupted by a load case. Encryption
and decryption should theoretically take the same amount of time, however, the
data showed decryption taking significantly longer; a problem that gets exacerbated
with larger data sizes. Furthermore, the findings indicates that the performance of
encryption and decryption functions remains unaffected by the available RAM.
Beskrivning
Ämne/nyckelord
Cryptograhpy , Cybersecurity , Embedded Sytems , Microcontroller , AES , Raspberry Pi Pico