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1. 发明授权

US10855441B2 Method of generating a pseudonym associated with a communication device, a network node, computer program and computer program product 有权
公开(公告)号：US10855441B2
公开(公告)日：2020-12-01
申请号：US15781260
申请日：2015-12-18
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： Karl Norrman , Jari Arrko , Elena Dubrova , Mats Näslund
IPC分类号： H04L29/06 , H04L9/06 , H04W12/02 , G06F21/62 , H04W12/00
摘要： A method (40) of generating a pseudonym associated with a communication device (11) is disclosed. The method (40) is performed in a network node (13) of a communications system (10) and comprises generating (41) a pseudonym embryo based on one or more elements of a sequence (S1, S2, . . . , Sn), obtaining (42) the pseudonym as output of a masking operation applied to the pseudonym embryo, wherein the masking operation comprises a one-to-one mapping, and transmitting (43) the pseudonym to the communication device (11). A corresponding network node (13), computer program and computer program product are also disclosed.

2. 发明授权

US10396996B2 Generating cryptographic checksums 有权
公开(公告)号：US10396996B2
公开(公告)日：2019-08-27
申请号：US15504604
申请日：2014-08-19
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Mats Näslund , Elena Dubrova , Fredrik Lindqvist , Göran Selander
IPC分类号： H04L9/32 , H04L1/00 , H04L9/06 , G06F7/72
摘要： A method (500) of generating a cryptographic checksum for a message M(x) is provided. The method comprises pseudo-randomly selecting (502) at least two irreducible polynomials pi(x). Each irreducible polynomial pi(x) is selected based on a first cryptographic key from the set of irreducible polynomials of degree ni over a Galois Field. The method further comprises calculating (503) a generator polynomial p(x) of degree n=formula (I) as a product of the N irreducible polynomials formula (II), and calculating (505) the cryptographic checksum as a first function g of a division of a second function of M(x), ƒ(M(x)), modulo p(x), i.e., g(ƒ(M(x)) mod p(x)). By replacing a standard checksum, such as a Cyclic Redundancy Check (CRC), with a cryptographic checksum, an efficient message authentication is provided. The proposed cryptographic checksum may be used for providing integrity assurance on the message, i.e., for detecting random and intentional message changes, with a known level of security. Further, a corresponding computer program, a corresponding computer program product, and a checksum generator for generating a cryptographic checksum, are provided. Σ i = 1 N ⁢ n i ( I ) p i ⁡ ( x ) , p ⁡ ( x ) = Π i = 1 N ⁢ p i ⁡ ( x ) , ( II )

3. 发明授权

US10129753B2 Methods and arrangements for authenticating a communication device 有权
公开(公告)号：US10129753B2
公开(公告)日：2018-11-13
申请号：US15023115
申请日：2015-12-07
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (publ)
发明人： Mats Näslund , Elena Dubrova , Karl Norrman , Vesa Torvinen
IPC分类号： G06F21/00 , H04W12/08 , H04L9/32 , H04L29/06 , H04W12/02 , H04W12/10 , H04W12/06 , H04L29/12 , H04W84/04
摘要： A method and arrangements for enabling authentication of a communication device is suggested, where a network node, capable of operating as an authentication server does not have to store all state related information relevant for a roundtrip of an authentication session. Instead of storing all this information, at least a part of it is provided to the authenticator or the communication unit, for later retrieval in a subsequent response. Based on the state related information provided in the response, the network node is capable of reproducing a state associated with a respective roundtrip. By repeating the mentioned process for a required number of roundtrips, an authentication session can be executed, where less state related information need to be stored at the mentioned network node.

4. 发明授权

US09952278B2 Remote test management of digital logic circuits 有权
公开(公告)号：US09952278B2
公开(公告)日：2018-04-24
申请号：US15114472
申请日：2014-02-05
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Elena Dubrova , Gunnar Carlsson , John Fornehed , Mats Näslund , Bernard Smeets
IPC分类号： G01R31/28 , G01R31/3181 , G01R31/3183
CPC分类号： G01R31/2884 , G01R31/31813 , G01R31/318335 , G01R31/318385
摘要： Electronic devices (320) are provided which comprise a digital logic circuit (101) and a test module (322) adapted to receive test parameters from a remote test management device (310), generate test patterns based on the test parameters, apply the test patterns to the digital logic circuit, receive test responses from the digital logic circuit, compact the test responses into a test signature, and either transmit the test signature to the remote test management device or determine a test result based on a comparison of an expected signature received from the remote test management device with the test signature. Further provided are remote test management devices comprising means adapted to acquire test parameters suitable for generating test patterns for a digital logic circuit, acquire an expected signature corresponding to the test patterns, transmit the test parameters to at least one electronic device comprising the digital logic circuit, and either receive a test signature from the at least one electronic device and determine a test result based on a comparison of the expected signature with the test signature, or transmit the expected signature to the at least one electronic device.

5. 发明授权

US11232718B2 Methods and devices for protecting data 有权
公开(公告)号：US11232718B2
公开(公告)日：2022-01-25
申请号：US16480798
申请日：2017-02-01
申请人： TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
发明人： Karl Norrman , Elena Dubrova
IPC分类号： G09C1/00 , G06F21/64 , H04L9/06 , H04L9/08 , H04L9/32
摘要： A method performed by a device for protecting data is provided. The method comprises inputting, to a Physically Unclonable Function, PUF, of the device, a challenge; obtaining, from the PUF, a response; and protecting the data by using the response. A device, a method in an encryption unit, computer program and computer program product are also provided.

6. 发明申请

US20180131679A1 Method and Device for Establishing a Computational Puzzle for Use in Communication Between a Client and a Server 审中-公开
公开(公告)号：US20180131679A1
公开(公告)日：2018-05-10
申请号：US15566397
申请日：2015-04-16
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Göran Selander , Elena Dubrova , Fredrik Lindqvist , Mats Näslund
IPC分类号： H04L29/06 , H04L9/06
摘要： The disclosure relates to a method (20) for a serving device (3) of establishing a computational puzzle for use in communication between a client device (2) and the serving device (3). The method (20) comprises establishing (21), in the serving device (3), the computational puzzle (p) based on a key shared by the client device (2) and the serving device (3) and on a solution (s′, s″) to the computational puzzle (p). Further method (30) in a serving device is provided, methods (60, 70) for client devices (2), serving devices (3), client devices (2), computer programs and computer program products.

7. 发明授权

US11243744B2 Method for performing a trustworthiness test on a random number generator 有权
公开(公告)号：US11243744B2
公开(公告)日：2022-02-08
申请号：US16339914
申请日：2016-11-15
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Mats Näslund , Elena Dubrova , Karl Norrman
IPC分类号： G06F7/58 , H04L9/32
摘要： A method (40) is provided for performing a trustworthiness test on a random number generator, RNG, (20) comprising a physical unclonable function, PUF-module (21). The trustworthiness test is implemented as a known answer test, KAT, and the method (40) comprises: receiving (41), in the PUF-module (21), an input based on test data, T, received from a verifier (11) provided with at least one test data-test result pair, (T, R), providing (42) an output from the PUF-module (21), determining (43) a test result, R′, based on the output from the PUF-module (21), and providing (44) the test result, R′, to the verifier (11). A random number generator (20), computer program and computer program products and a method performed by or in a verifier are also provided.

8. 发明申请

US20200050430A1 Method for Performing a Trustworthiness Test on a Random Number Generator 审中-公开
公开(公告)号：US20200050430A1
公开(公告)日：2020-02-13
申请号：US16339914
申请日：2016-11-15
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Mats Näslund , Elena Dubrova , Karl Norrman
IPC分类号： G06F7/58 , H04L9/32
摘要： A method (40) is provided for performing a trustworthiness test on a random number generator, RNG, (20) comprising a physical unclonable function, PUF,-module (21). The trustworthiness test is implemented as a known answer test, KAT, and the method (40) comprises: receiving (41), in the PUF-module (21), an input based on test data, T, received from a verifier (11) provided with at least one test data-test result pair, (T, R), providing (42) an output from the PUF-module (21), determining (43) a test result, R′, based on the output from the PUF-module (21), and providing (44) the test result, R′, to the verifier (11). A random number generator (20), computer program and computer program products and a method performed by or in a verifier are also provided.

9. 发明授权

US09933481B2 Testing a feedback shift-register 有权
公开(公告)号：US09933481B2
公开(公告)日：2018-04-03
申请号：US15038617
申请日：2013-11-28
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Göran Selander , Mats Näslund , Elena Dubrova
IPC分类号： G01R11/00 , G01R31/317 , G01R31/3181 , G11C19/28 , G01R31/3185 , G11C29/02 , G01R31/3177
CPC分类号： G01R31/31703 , G01R31/31723 , G01R31/3177 , G01R31/31813 , G01R31/318547 , G11C19/28 , G11C29/02 , G11C29/021
摘要： A Feedback Shift-Register (FSR) enabling improved testing, e.g., Built-In Self-Tests (BIST), is provided. Each cell of the FSR may either be an observable cell, associated with a non-trivial feedback function implemented by a combinational logic circuit, or a controllable cell, having an associated state variable which belongs to the dependence set of exactly one of the non-trivial feedback functions. Each controllable cell is provided with a multiplexer for selecting either a predecessor cell of the controllable cell or a test value as input. Thus, the sequential circuit of the FSR in an embodiment is tested using tests for combinational logic. The disclosed test procedures utilize a minimal set of test vectors and allow detection of all single stuck-at faults in the FSR. The resulting dynamic power dissipation during test can be considerably less than known BIST designs.

10. 发明授权

US10735392B2 Method and device for establishing a computational puzzle for use in communication between a client and a server 有权
公开(公告)号：US10735392B2
公开(公告)日：2020-08-04
申请号：US15566397
申请日：2015-04-16
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Göran Selander , Elena Dubrova , Fredrik Lindqvist , Mats Näslund
IPC分类号： H04L29/06 , H04L9/06 , H04L29/02
摘要： The disclosure relates to a method (20) for a serving device (3) of establishing a computational puzzle for use in communication between a client device (2) and the serving device (3). The method (20) comprises establishing (21), in the serving device (3), the computational puzzle (p) based on a key shared by the client device (2) and the serving device (3) and on a solution (s′, s″) to the computational puzzle (p). Further method (30) in a serving device is provided, methods (60, 70) for client devices (2), serving devices (3), client devices (2), computer programs and computer program products.

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