Computing device for iterative applications of tabular networks

Abstract

A computing device (500) comprising an electronic storage device (510) and an electronic processor (550) coupled to the storage device, the storage device storing a sequence of a network of tables (110, T 1 , T 2 ), the processor is configured by applying the tabular network of the tabular network sequence to the global data input (121,w 0 ) and the global state input (121,s 0 ) on computed iterated functions, ‑sequences of tabular networks (112, 114, T i ) configured for the corresponding data function (f i ) and the state function (g i ), and configured according to the corresponding data function (f i ) to feed the data into (121, 122, w i‑1 ) maps to the data output (122, 123, w i ) and at the same time according to the state function (g i ) puts the state into (121, 122, s i‑1 ) is mapped to the state output (122, 123, s i ), ‑ the electronic processor is configured to iteratively feed the global data input (w 0 ) and the global state input (s 0 ) to apply a sequence of tabular networks (T 1 ,T 2 ,T 1 ,T 2 ), the tabular network in the iteratively applied tabular network (T 1 ), and successive tabular networks of the iteration applying the iteration to the data output and state output of the previous tabular network of the sequence (T 2 ,T 1 ,T 2 ), the iterative application of the sequence determines the global data function on the global data input and the global state function on the global state input, thereby obtaining the intermediate data output (w inter =f(w 0 )) and intermediate state output (s inter =g(s 0 )), - the electronic storage device also stores a protected table network (150) configured to cooperate with the sequence of table networks for modifications made to the sequence of table networks, the protected table network configured to receive as input: intermediate status output (126, s inter ) and the global state input (131, s 0 ), the protection tabular network is configured to verify that it is applied to the global state input (s 0 ) of the global state function (g) produces an intermediate state output (s inter =g(s 0 )?).

Description

technical field [0001] The invention relates to a computing device comprising an electronic storage device storing a network of tables and an electronic processor coupled to the storage device, the processor being configured to compute a function by applying the table network. [0002] The invention also relates to computing methods, compilers and corresponding computer programs. Background technique [0003] In traditional cryptography, it is typically assumed that an attacker only gains access to the input and output values ​​of the secure system. For example, an attacker would be able to observe plain text going into the system and observe encrypted text coming out of the system. Although an attacker may try to gain an advantage by analyzing such input / output pairs, possibly even using computationally intensive methods, he is not considered to have direct access to the system implementing the input / output behavior. [0004] More recently, it has become necessary to cons...

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Problems solved by technology

The resulting algorithm only works for one specific key

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