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ETSI TR 103 967

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Omfang

The present document gives an overview of the impact of quantum computing on symmetric algorithms such as block ciphers and hash functions. It discusses the practicality of parallelising Grover's algorithm, the effect of limiting quantum circuit depth, and the overhead from quantum error correction. The present document supplements ETSI GR QSC 006 [i.1] by summarizing quantum resource estimates for attacks against widely used symmetric algorithms with reasonable circuit depth assumptions. It also provides guidance on the need to increase symmetric key lengths for a range of different use cases.

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  • Varetype: IS
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