Patent · US Active

Secure short message service over non-access stratum

US10470042B2 · kind B2 · utility

5Cited by

0References

22Claims

0Family size

Assignee

NOKIA TECHNOLOGIES OY · FI

Inventors

Suresh P. Nair · Whippany, US
Anja Jerichow · Garching bei München, DE
Nagendra S. Bykampadi · Bengaluru, IN

Key dates

Filing date	May 8, 2018
Grant date	Nov 5, 2019
Priority date	—
Expiry date	May 8, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH04W88/184
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A short message service (SMS) message is encrypted using an encryption key stored at a user equipment and an access and mobility management function (AMF) and the encrypted SMS message is added to a payload of a non-access stratum (NAS) message that includes an NAS header. Integrity protection is applied to the NAS message using an integrity key stored at the user equipment and the AMF and the integrity-protected NAS message is transmitted. The NAS message is received via an NAS link between the user equipment and the AMF. An integrity check is performed on the NAS message using the integrity key. An encrypted short message service (SMS) message is extracted from a payload of the NAS message in response to the integrity check being successful and the encrypted SMS message is decrypted using the encryption key.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.