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- W2238181472 abstract "This paper analyses the cryptography used in the Open Smart Grid Protocol (OSGP). The authenticated encryption (AE) scheme deployed by OSGP is a non-standard composition of RC4 and a home-brewed MAC, the “OMA digest”. We present several practical key-recovery attacks against the OMA digest. The first and basic variant can achieve this with a mere 13 queries to an OMA digest oracle and negligible time complexity. A more sophisticated version breaks the OMA digest with only 4 queries and a time complexity of about $$2^{25}$$ simple operations. A different approach only requires one arbitrary valid plaintext-tag pair, and recovers the key in an average of 144 message verification queries, or one ciphertext-tag pair and 168 ciphertext verification queries. Since the encryption key is derived from the key used by the OMA digest, our attacks break both confidentiality and authenticity of OSGP." @default.
- W2238181472 created "2016-06-24" @default.
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- W2238181472 date "2015-01-01" @default.
- W2238181472 modified "2023-10-17" @default.
- W2238181472 title "Practical Cryptanalysis of the Open Smart Grid Protocol" @default.
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- W2238181472 doi "https://doi.org/10.1007/978-3-662-48116-5_15" @default.
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