Title of Invention

A MOBILE TELEPHONE

Abstract

A mobile telephone (1) comprising: reception means (5) for receiving message data (10) including key data (12) and instruction data (13) from a caller, instruction processing means (6) operable to process the instruction data (13) in dependence upon the key data (12), characterised in that the reception means (5) is operable to receive message data (10) that includes identity data (11), the identity data (11) relating to the caller and the key data (12) relating to the mobile telephone (1); and characterised by: memory means (7) operable to store caller identity data and associated stored security data; data processing means (6) operable to combine received identity data (11) and received key data (12) to produce received security data (SNIN) ; and comparison means (6) operable to compare the received security data (SNIN) with stored security data . (SNST0RED) relating to the received identity data (11) , the instruction processing means (6) being operable to process the instruction data (13) if the received security data (SNIN) is equivalent to the stored security data (SNST0RED) , or operable to reject the instruction data (13) if the received and stored security data are not equivalent.

Full Text

FORM 2 THE PATENTS ACT, 1970 (39 of 1970) COMPLETE SPECIFICATION [see Section 10 and Rule 13) "A Mobile Telephone" TELEFONAKTIEBOLAGET LM ERICSSON (publ), a Swedish Company of S-164 83 Stockholm, SWEDEN, The following specification particularly describes the nature of this invention and the manner in which it is to be performed. SECURE MESSAGING IN MOBILE TELEPHONES The present invention relates to mobile telephones and, in particular but not exclusively, to mobile telephones which are able to send and receive short text messages using the short message service provided by GSM Mobile Telephone Standards. DESCRIPTION OF THE RELATED ART The GSM short message service (SMS) can be used by base stations and mobile units within a network to interrogate and gain information from a target mobile unit, and can be used to change operational settings of the mobile unit. Such information could be related to the geographical position of the mobile station, or details of the current cell site in which the mobile station is operating. Some operational settings which may be modified could include details of closed user group numbers, call forwarding or barring details etc. It is therefore desirable to provide a system in which short messages (SMs) that are intended to make operational changes or request information from a mobile unit are encoded to prevent fraudulent use. SUMMARY OF THE PRESENT INVENTION According to one aspect of the present invention, there is provided a method of operating a mobile telephone comprising receiving message data including identity data and instruction data from a caller, the identity data relating to the caller and the key data relating to the called unit; combining the identity data and key data to produce received security data; obtaining stored security data from a memory of the telephone on the basis of the received identity data; comparing the received security data with the stored security data; and processing the instruction data if the received security data is equivalent to the stored security data, or rejecting the instruction data if the received and stored security data are not equivalent. According to a second aspect of the present invention, there is provided a mobile telephone comprising reception means for receiving message data including identity data from a caller, the identity data relating to the caller and the key data relating to the called unit; memory means for storing caller identity data and associated stored security data; data processing means for combining received identity and key data to produce received security data; and comparison means for comparing the received security data with stored security data relating to the received identity data, and for processing the instruction data if the received security data is equivalent to the stored security data, or for rejecting the instruction data if the received and stored security data are hot equivalent. BRIEF SUMMARY OF THE DRAWINGS Figure 1 shows a schematic view of a mobile telephone; Figure 2 shows a block diagram of parts of a mobile telephone embodying the present invention; Figures 3 and 4 illustrate a stored data entry and a short message respectively; and Figure 5 is a flow chart illustrating steps in a method embodying the present invention. mobile telephone. Accordingly, embodiments of the present invention can provide a mobile telephone which can enable secure access to information provided by the mobile telephone, by storing a security number for a particular calling station in a telephone book entry in the phone book memory of the telephone. Since the combining algorithm and the security number are confidential to the mobile telephone user, heightened security is possible. We Claim: 1. A mobile telephone (1) comprising: reception means (5) for receiving message data (10) including key data (12) and instruction data (13) from a caller, instruction processing means (6) operable to process the instruction data (13) in dependence upon the key data (12), characterised in that the reception means (5) is operable to receive message data (10) that includes identity data (11), the identity data (11) relating to the caller and the key data (12) relating to the mobile telephone (1); and characterised by: memory means (7) operable to store caller identity data and associated stored security data; data processing means (6) operable to combine received identity data (11) and received key data (12) to produce received security data (SNIN) ; and comparison means (6) operable to compare the received security data (SNIN) with stored security data . (SNST0RED) relating to the received identity data (11) , the instruction processing means (6) being operable to process the instruction data (13) if the received security data (SNIN) is equivalent to the stored security data (SNST0RED) , or operable to reject the instruction data (13) if the received and stored security data are not equivalent. 2. A mobile telephone (1) as claimed in claim wherein the message data (13) is in the form of a GSM short message and the stored security data (SNST0RED) is stored in a user accessible storage area (7) . 3 A mobile telephone (1) as claimed in claim 2 wherein the storage area is a telephone book memory (7) of the mobile telephone, the telephone book memory (7) storing caller identity data (11) and associated stored security data (SNSTORED) . 4. A mobile telephone as claimed in claim or 3 wherein the data processing means (6) operates in accordance with an algorithm (AX) uniquely associated with the mobile telephone (1). (Dr. Ramesh K. Mehta) Remfry & Sagar Attorney for the Applicants

Documents:

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in-pct-2000-00755-mum-assingment(1-9-2004).pdf

in-pct-2000-00755-mum-cancelled pages(28-7-2004).pdf

in-pct-2000-00755-mum-claims(granted)-(28-7-2004).doc

in-pct-2000-00755-mum-claims(granted)-(28-7-2004).pdf

in-pct-2000-00755-mum-correspondence 1(20-6-2006).pdf

in-pct-2000-00755-mum-correspondence 2(1-9-2004).pdf

in-pct-2000-00755-mum-correspondence(ipo)-(15-11-2006).pdf

in-pct-2000-00755-mum-drawing(28-7-2004).pdf

in-pct-2000-00755-mum-form 13(20-6-2006).pdf

in-pct-2000-00755-mum-form 13(27-4-2001).pdf

in-pct-2000-00755-mum-form 1a(7-7-2004).pdf

in-pct-2000-00755-mum-form 2(granted)-(28-7-2004).doc

in-pct-2000-00755-mum-form 2(granted)-(28-7-2004).pdf

in-pct-2000-00755-mum-form 3(19-12-2000).pdf

in-pct-2000-00755-mum-form 3(7-7-2004).pdf

in-pct-2000-00755-mum-form 4(24-3-2004).pdf

in-pct-2000-00755-mum-form 5(19-12-2000).pdf

in-pct-2000-00755-mum-form-pct-ipea-409(19-12-2000).pdf

in-pct-2000-00755-mum-form-pct-isa-210(19-12-2000).pdf

in-pct-2000-00755-mum-petition under rule 138(28-7-2004).pdf

in-pct-2000-00755-mum-petition under rule 138(7-7-2004).pdf

in-pct-2000-00755-mum-power of authority(7-7-2004).pdf