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A note on quantum related-key attacks | | Martin Roetteler
; Rainer Steinwandt
; | | Date: |
10 Jun 2013 | | Abstract: | In a basic related-key attack against a block cipher, the adversary has
access to encryptions under keys that differ from the target key by bit-flips.
In this short note we show that for a quantum adversary such attacks are quite
powerful: if the secret key is (i) uniquely determined by a small number of
plaintext-ciphertext pairs, (ii) the block cipher can be evaluated efficiently,
and (iii) a superposition of related keys can be queried, then the key can be
extracted efficiently. | | Source: | arXiv, 1306.2301 | | Services: | Forum | Review | PDF | Favorites | |
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