The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 2021
Filed:
May. 29, 2018
Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A method to obscure a control execution flow in a computer program includes initializing a state variable, q, and a switching variable, selecting a code block for execution using a present value of the switching variable, executing the code block, updating the state variable based on a present value of the state variable and a block-dependent constant that is associated with the code block to generate an updated state variable, and by applying a state update function to the updated state variable, and updating the switching variable by processing the state variable through a non-injective output function that generates a new value of the switching variable based on the state variable. The operations of selecting the code block, executing the code block, updating the state variable and updating the switching variable are repeated to control execution flow.