Patent ID: 9414233
Filing Date: 2016-08-09
CPC Classification: H04W

Claim Text:
1. A method of protecting operating profiles transmitted to an embedded universal integrated circuit card (eUICC) from a mobile network operator (MNO) system and a subscription manager (SM), the method comprising: receiving, by the eUICC, an encrypted profile from an external entity; and decrypting the encrypted profile by using a private key stored in and generated by the eUICC or a terminal equipped with the wherein the encrypted profile is encrypted by using a public key of the eUICC, and the private key is profile access credentials or a secret key corresponding to the public key of the eUICC, wherein the SM includes a subscription manager-data preparation (SM-DP) and a subscription manager-secure routing (SM-SR), the SM-DP encrypts the profile by using the public key of the eUICC, and the SM-SR successively encrypts the profile, which has been encrypted using the public key, by using a separate management key so that the encrypted profile becomes a double ciphered profile, and wherein the encrypted profile is the double ciphered profile, and the eUICC successively decrypts the encrypted profile by using the separate management key and then decrypts the profile, which has been decrypted using the separate management key, by using the private key of the eUICC wherein the private key is dynamically generated at every issuance time.