Method and System for Encrypting Short Message
First Claim
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1. A method for implementing short message encryption, comprising the following steps of:
- a mobile station (MS) of a transmitting party encrypting a short message to be transmitted using a cipher key (CK) of the transmitting party as an encryption factor and then sending the short message out;
a mobile switching center (MSC) to which the MS of the transmitting party belongs decrypting the short message using the CK of the transmitting party as a decryption factor after receiving the short message, and then sending the short message to a short message service center (SC) through an interworking message service center (IWMSC);
after receiving the short message transmitted by the SC through a gateway mobile switching center (GMSC), an MSC to which an MS of a receiving party belongs encrypting the short message using a CK of the receiving party as an encryption factor and then sending the short message to the MS of the receiving party;
after receiving the short message, the MS of the receiving party decrypting the short message using the CK of the receiving party as a decryption factor, thereby restoring a content of the short message.
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Abstract
The present invention discloses a method and system for implementing short message encryption. Both the Mobile Station (MS) and the Mobile Switching Center (MSC) are configured with encryption-decryption modules (1), which can encrypt and decrypt the short message by using the Cipher Key (CK) as the encryption-decryption factor. The CK is variable with the Random value (RAND). The CK is not shared between the receiving end and the sending end in the whole process, so that the encrypted short message has a high confidentiality. In addition, the security of the whole transmission environment can be realized by the selectable configuration.
9 Citations
17 Claims
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1. A method for implementing short message encryption, comprising the following steps of:
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a mobile station (MS) of a transmitting party encrypting a short message to be transmitted using a cipher key (CK) of the transmitting party as an encryption factor and then sending the short message out; a mobile switching center (MSC) to which the MS of the transmitting party belongs decrypting the short message using the CK of the transmitting party as a decryption factor after receiving the short message, and then sending the short message to a short message service center (SC) through an interworking message service center (IWMSC); after receiving the short message transmitted by the SC through a gateway mobile switching center (GMSC), an MSC to which an MS of a receiving party belongs encrypting the short message using a CK of the receiving party as an encryption factor and then sending the short message to the MS of the receiving party; after receiving the short message, the MS of the receiving party decrypting the short message using the CK of the receiving party as a decryption factor, thereby restoring a content of the short message. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for transmitting an encrypted short message, comprising the following steps of:
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a mobile station (MS) of a transmitting party encrypting a short message to be transmitted using a cipher key (CK) of the transmitting party as an encryption factor and then sending the short message out; a mobile switching center (MSC) to which the MS of the transmitting party belongs decrypting the short message using the CK of the transmitting party as a decryption factor after receiving the short message, and then sending the short message to a short message service center (SC) through an interworking message service center (IWMSC). - View Dependent Claims (8, 9)
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10. A method for receiving an encrypted short message, comprising the following steps of:
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after receiving the short message transmitted by a short message service center (SC) through a gateway mobile switching center (GMSC), an mobile switching center (MSC) to which a mobile station (MS) of a receiving party belongs encrypting the short message using a cipher key (CK) of the receiving party as an encryption factor and then sending the short message to the MS of the receiving party; after receiving the short message, the MS of the receiving party decrypting the short message using the CK of the receiving party as a decryption factor, thereby restoring a content of the short message. - View Dependent Claims (11, 12)
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13. A system for implementing short message encryption, comprising a mobile station (MS) of a transmitting party, a mobile switching center (MSC) to which the MS of the transmitting party belongs, an MSC to which an MS of a receiving party belongs, the MS of the receiving party, and the MS and MSC of the transmitting party and the MS and MSC of the receiving party being all configured with encryption-decryption modules, wherein,
the MS of the transmitting party is configured to encrypt a short message to be transmitted using a cipher key (CK) of the transmitting party as an encryption factor through the encryption-decryption module of itself and then send the short message out; -
the MSC to which the MS of the transmitting party belongs is configured to decrypt the short message using the CK of the transmitting party as a decryption factor after receiving the short message, and then send the short message to a short message service center (SC) through an interworking message service center (IWMSC); the MSC to which the MS of the receiving party belongs is configured to encrypt the short message using a CK of the receiving party as an encryption factor through the encryption-decryption module of itself after receiving the short message transmitted by the SC through the GMSC and then send the short message to the MS of the receiving party; the MS of the receiving party is configured to decrypt the short message using the CK of the receiving party as a decryption factor through the encryption-decryption module of itself after receiving the short message, thereby restoring a content of the short message.
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Specification