US 12,177,662 B2
Privacy key and message authentication code
Vesa Torvinen, Sauvo (FI); Noamen Ben Henda, Stockholm (SE); David Castellanos Zamora, Madrid (ES); Prajwol Kumar Nakarmi, Sollentuna (SE); Pasi Saarinen, Spånga (SE); and Monica Wifvesson, Lund (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on May 5, 2022, as Appl. No. 17/737,675.
Application 17/737,675 is a continuation of application No. 16/633,908, granted, now 11,330,433, previously published as PCT/EP2018/069433, filed on Jul. 17, 2018.
Claims priority of provisional application 62/536,632, filed on Jul. 25, 2017.
Prior Publication US 2022/0272534 A1, Aug. 25, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 29/06 (2006.01); H04L 9/08 (2006.01); H04L 9/30 (2006.01); H04L 9/32 (2006.01); H04L 9/40 (2022.01); H04W 8/18 (2009.01); H04W 12/02 (2009.01); H04W 12/033 (2021.01); H04W 12/04 (2021.01); H04W 12/0433 (2021.01); H04W 12/06 (2021.01); H04W 12/72 (2021.01); H04W 60/00 (2009.01); H04W 12/10 (2021.01); H04W 12/75 (2021.01)
CPC H04W 12/06 (2013.01) [H04L 9/083 (2013.01); H04L 9/0841 (2013.01); H04L 9/088 (2013.01); H04L 9/3066 (2013.01); H04L 9/321 (2013.01); H04L 9/3242 (2013.01); H04L 9/3247 (2013.01); H04L 63/0414 (2013.01); H04L 63/0428 (2013.01); H04L 63/06 (2013.01); H04W 8/18 (2013.01); H04W 12/02 (2013.01); H04W 12/033 (2021.01); H04W 12/04 (2013.01); H04W 12/0433 (2021.01); H04W 12/72 (2021.01); H04W 60/00 (2013.01); H04L 63/123 (2013.01); H04L 2209/80 (2013.01); H04L 2463/061 (2013.01); H04W 12/10 (2013.01); H04W 12/75 (2021.01)] 15 Claims
OG exemplary drawing
 
1. A method performed by an authentication server in a home network of a user equipment (UE) for obtaining a subscription permanent identifier (SUPI), which comprises a Mobile Subscription Identification Number, a Mobile Country Code and a Mobile Network Code, the method comprising:
receiving a subscription concealed identifier (SUCI) comprising: i) an encrypted part in which the Mobile Subscription Identification Number is encrypted, and ii) a clear-text part comprising: a) the Mobile Country Code, b) the Mobile Network Code, c) a public key identifier for a public key of the home network, and d) an encryption scheme identifier that identifies an encryption scheme used by the UE to encrypt the Mobile Subscription Identification Number in the SUCI;
determining a de-concealing server to use to decrypt the Mobile Subscription Identification Number;
sending the SUCI to the de-concealing server; and
receiving the SUPI in response, wherein
receiving the SUCI comprises receiving a message transmitted by the UE as part of a registration procedure for registering the UE with a wireless communication network, wherein the message comprises the SUCI.