Patent ID: 8112638

Claim:
A secure backup system in a mobile telecommunication network, comprising: a first mobile station with data, the first mobile station having means for creating a backup file of the data in an encrypted form, the first mobile station having means for sending the encrypted backup file over the mobile communication network to a backup entity, the backup entity having means for receiving and storing the encrypted backup file, a decryption key containing at least a first key part, a second key part and a key recreation key part, a second mobile station having means for retrieving the encrypted backup file and for retrieving the first key part of the decryption key from a first entity and for retrieving the second key part of the decryption key from a second entity, the first entity being different from the second entity, the second mobile station having means for receiving the key recreation key and combining the first key part and the second key part and forming the decryption key, and the second mobile station having means for decrypting the backup file using the decryption key.