发明名称 |
KEY SHARING DEVICE AND SYSTEM FOR CONFIGURATION THEREOF |
摘要 |
A method of configuring a network device for key sharing and a method for a first network device to determine a shared key are provided. The method of configuring uses a private modulus ( p 1 ), a public modulus ( N ), and a bivariate polynomial ( f 1 ) having integer coefficients, the binary representation of the public modulus and the binary representation of the private modulus are the same in at least key length ( b ) consecutive bits. Local key material for a network device is generated by substituting an identity number into the bivariate polynomial and reducing modulo the private modulus the result of the substitution to obtain a univariate polynomial. Security may be increased by adding (440) one or more obfuscating numbers to coefficients of the univariate polynomial to obtain an obfuscated univariate polynomial. In a use phase, the network device determines a shared cryptographic key, by substituting (530) the identity number of another network device into the univariate polynomial and reducing modulo the public modulus and reducing modulo a key modulus. |
申请公布号 |
EP2853057(A1) |
申请公布日期 |
2015.04.01 |
申请号 |
EP20130713432 |
申请日期 |
2013.03.28 |
申请人 |
KONINKLIJKE PHILIPS N.V. |
发明人 |
GARCIA MORCHON, OSCAR;TOLHUIZEN, LUDOVICUS, MARINUS, GERARDUS, MARIA;GUTIERREZ, JAIME;KUMAR, SANDEEP, SHANKARAN;GOMEZ, DOMINGO |
分类号 |
H04L9/08;H04L29/06;H04W12/04;H04W12/12 |
主分类号 |
H04L9/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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