CN101720071A - Short message two-stage encryption transmission and secure storage method based on safety SIM card - Google Patents
Short message two-stage encryption transmission and secure storage method based on safety SIM card Download PDFInfo
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- CN101720071A CN101720071A CN200910227210A CN200910227210A CN101720071A CN 101720071 A CN101720071 A CN 101720071A CN 200910227210 A CN200910227210 A CN 200910227210A CN 200910227210 A CN200910227210 A CN 200910227210A CN 101720071 A CN101720071 A CN 101720071A
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Abstract
The invention relates to a short message two-stage encryption transmission and secure storage method based on a safety SIM card, which comprises two steps of encryption transmission and encryption storage of a short message. A mobile phone terminal and a safety short message server negotiate a session key through an agreed protocol, and a safety transmission channel is established between the mobile phone terminal and the safety short message server. The mobile phone terminal and the safety short message server encrypt and decrypt the short message through the session key, the short message is always in a ciphertext state during air transmission, and a cleartext occurs after the short message is born. For the short message requiring for encryption storage, the short message is encrypted for storage in a filing cabinet form, the grouping quantity of filing cabinets is dynamically changeable, and the unique identification code of the filing cabinets is an access password thereof. The storage method greatly protects the privacy of the short message of a user for the encryption storage.
Description
Technical field:
The present invention relates to the method for sending and receiving short messages and storage between a kind of mobile subscriber equipment, particularly a kind of short message two-stage encryption transmission and method for secure storing based on the safety SIM card.
Background technology:
SIM card is the abbreviation of (Subscriber Identity Model client identification module), is also referred to as smart card, subscriber identification card, and the GSM digital mobile telephone must be loaded onto this card and can use.SIM card has and sends SMS message, receives message function.According to the GSM standard agreement, SIM card according to the reference format transmission that packages, can also receive the short message that wireless network sends over to compiled short message, stores into automatically in SIM card or the mobile phone then.The convenience that has with short message itself of popularizing along with mobile terminal device, fast, advantages such as expense is cheap, have increasing mobile subscriber with short message as information carrier, carry out information inquiry, service announcements, information activities such as online transaction, because these activities often relate to sensitivity or important information, therefore, higher demand for security has been proposed for the safety of short message.Short message service is at present used and is had some defectives:
1. the content of information is transmitted with clear-text way, can intercept content of short message easily by technological means, causes the information content to be stolen or leaks.
2. the content of information is stored on the mobile device with clear-text way, in case lose or checked that by other people information content privacy can expose.
The receiving short message both sides have very high user demand to privacy and fail safe in short message transmission and the storing process.
Summary of the invention:
The objective of the invention is to overcome the deficiencies in the prior art and provide a kind of under the support of safety SIM card, the realization to consult, carry out that short message lands that deciphering and encrypting is transmitted and realize that based on the classified document cabinet short message encrypts the short message two-stage encryption transmission and the method for secure storing based on the safety SIM card of storage security function based on the safety short message service server based on the dynamic session of public key certificate.
The object of the present invention is achieved like this: this method comprises the short message encrypted transmission and encrypts two steps of storage:
1), short message encrypted transmission step, be divided into two stages to realize:
Phase I, the protocol negotiation by agreement between mobile phone terminal and the safe short message service server goes out session key, and between is set up secure transmission tunnel;
Second stage, mobile phone terminal and safe short message service server are utilized session key that short message is carried out encryption and decryption and are handled, and guarantee that short message is the ciphertext state in the transmission course all the time aloft, expressly land the back at short message and occur;
2) short message encryption storing step is that the short message that the encryption storage demand is arranged is encrypted storage according to the organizational form of file cabinet, file cabinet grouping number dynamically changeable, and the unique identification sign indicating number of file cabinet is its access code.STK uses the password that lands by the user and mates wherein one group of file cabinet automatically, and the user can only check the content of short message that oneself lands under the affiliated encrypt file cabinet of password.
Described session key is based on the session key in the public key certificate negotiation short message transmission process, and according to the dynamic online replacing user conversation key of actual user demand, may further comprise the steps:
1), the distribution of public key certificate:
A, certificate server are that safe short message service server and terminal use generate public key certificate separately;
B, certificate server off-line write safe short message service server public key certificate to the safety SIM card;
C, certificate server are notified safe short message service server client public key certificate;
2), session key agreement:
Pass through public key certificate between terminal use and the safe short message service server, realize both sides' authentication, negotiate session key, realize then receiving confidentiality, the authenticity and integrity service that short message transmits between the both sides, the message that key agreement protocol sent is as follows:
C-＞S：Nc
S-＞C：PEc(SIGs(Kcs，Nc，Ns))
C-＞S：Ns
Wherein C represents the portable terminal transmit leg, and S represents safe short message service server recipient; PEc represents the public key encryption with C, and SIGs represents the private key signature with S,
The step that the session key agreement agreement is carried out is as follows:
The first step, the sending direction recipient sends the plaintext authentication request, and request content comprises that terminal produces proof factor Nc;
Second step, safe short message service server is searched the corresponding certificate of this user according to the phone number of portable terminal, and verify this certificate legitimacy to certificate server after, produce a session key Kcs and proof factor Ns, utilize oneself the private key and the encrypted public key of portable terminal Kcs, Ns, Nc are signed and to encrypt, pass to portable terminal then;
The 3rd step, the cipher-text information that portable terminal sends the safety short message service server is carried out DecryptDecryption (earlier test label, use self private key DecryptDecryption again with the PKI of the safe short message service server that prestores), after checking the Nc unanimity, Ns is passed to safe short message service server with plaintext;
In the 4th step, after checking was passed through, portable terminal was passed to safe short message service server with Ns, and server compares the Ns that receives and original Ns, and affirmation is consulted successfully.
Described short message encryption and decryption is handled and is meant that encrypting short message lands decryption processing and encrypt and transmit on the safety short message service server, utilizes session key to carry out the short message encryption and decryption and handles, and the sending and receiving short messages step is as follows:
The first step, terminal use A is to the terminal use B M that sends SMS message, and this message M uses the session key Kca that consults between user A and the safe short message service server to encrypt, and obtains message ciphertext C1, C1=EKca (M), C1 at first is sent to safe short message service server;
In second step, safe short message service server is received this ciphertext C1, to message C1 deciphering, obtains M, M=DKca (C1) with session key Kca;
In the 3rd step, safe short message service server is encrypted clear-text message M with the session key Kcb of user B, obtain ciphertext C2, C2=EKcb (M);
The 4th one, safe short message service server sends to user B with ciphertext C2, and user B uses Kcb that C2 is decrypted, and obtains M.M＝DKcb(C2)；
Here E and D represent the encryption and decryption operation in the symmetric cryptography respectively;
So far short message M,, is existed with the ciphertext form in transmission course to user B all the time by user A safe transmission.
Described short message is encrypted storage and is meant that it is as follows to use the encrypt file cabinet to encrypt storing step to there being the short message of encrypting storage demand to encrypt storage according to the organizational form of file cabinet:
The first step, set up the file cabinet structure: the memory space that safe SIM card will be blocked is divided into each group by the form of file cabinet;
Second step, the user is provided with file cabinet: the corresponding operator password of each file cabinet, can only check the note in the affiliated encrypt file cabinet of own input operation password when checking note, if forget encrypt file cabinet operator password, need reset this document cabinet, delete All Files and information in this encrypt file cabinet simultaneously;
In the 3rd step, the note of receiving number is stored according to file cabinet, and the user has only the operator password of this cabinet correspondence of input just can check note.
The present invention has following good effect: aspect the short message encrypted transmission, carry out short message based on the safety short message service server and land deciphering and encrypt to transmit, guarantee that short message is the ciphertext state in the transmission course all the time aloft, expressly only land the back and occur at short message.Aspect short message encryption storage,, the short message of encrypting storage demand encrypts storage according to the organizational form of file cabinet to being arranged.The user can only check the content of short message that oneself lands under the affiliated encrypt file cabinet of password.This method allows user's dynamic assignment file cabinet quantity, and the concrete structure of file cabinet is sightless to other users, has greatly protected user's short message to encrypt the privacy of storage.
Description of drawings:
Fig. 1 is a certificate distribution procedure schematic diagram of the present invention.
Fig. 2 is a session key agreement schematic diagram of the present invention.
Fig. 3 is that short message encryption and decryption of the present invention is handled schematic diagram.
Fig. 4 is an encrypt file cabinet schematic diagram of the present invention.
Embodiment:
As shown in Figure 1, safe SIM card of the present invention is on the basis of common SIM card, carries out safety Design again based on chip, to the control of authority of calling and the use of system resource is all had strictness of function.To the input and output of sensitive data, can adopt the safe packet load mode, guarantee the safety of data.The Generally Recognized as safe SIM card is supported symmetry algorithm and asymmetric arithmetic.
1, consult based on the dynamic session of public key certificate, it is characterized in that:, and can may further comprise the steps according to the dynamic online replacing user conversation key of actual user demand based on the session key in the public key certificate negotiation short message transmission process:
1), public key certificate distribution:
A. certificate server is that safe short message service server and terminal use generate public key certificate separately;
B. the certificate server off-line writes safe short message service server public key certificate to the safety SIM card;
C. certificate server is notified safe short message service server client public key certificate;
2), session key agreement: pass through public key certificate between terminal use and the safe short message service server, realize both sides' authentication, negotiate session key, realize receiving confidentiality, the authenticity and integrity service that short message transmits between the both sides then, as shown in Figure 2.
The message that key agreement protocol sent is as follows:
C-＞S：Nc
S-＞C：PEc(SIGs(Kcs，Nc，Ns))
C-＞S：Ns
Wherein C represents transmit leg (portable terminal), and S represents recipient's (safe short message service server); PEc represents the public key encryption with C, and SIGs represents the private key signature with S.
The step that the session key agreement agreement is carried out is as follows:
The first step, the sending direction recipient sends the plaintext authentication request, and request content comprises that terminal produces proof factor Nc;
Second step, safe short message service server is searched the corresponding certificate of this user according to the phone number of portable terminal, and verify this certificate legitimacy to certificate server after, produce a session key Kcs and proof factor Ns, utilize oneself the private key and the encrypted public key of portable terminal Kcs, Ns, Nc are signed and to encrypt, pass to portable terminal then;
The 3rd step, the cipher-text information that portable terminal sends the safety short message service server is carried out DecryptDecryption (earlier test label, use self private key DecryptDecryption again with the PKI of the safe short message service server that prestores), after checking the Nc unanimity, Ns is passed to safe short message service server with plaintext.
In the 4th step, after checking was passed through, portable terminal was passed to safe short message service server with Ns, and server compares the Ns that receives and original Ns, and affirmation is consulted successfully.
According to above step, the session key that negotiates can dynamically be changed by the user according to demand, has simplified the process of key updating, is user-friendly to and manages.
2, the short message encryption and decryption is handled: as shown in Figure 3, encrypt short message and land decryption processing and encrypt and transmit on the safety short message service server, utilize session key to carry out the short message encryption and decryption and handle.
The first step, terminal use A is to the terminal use B M that sends SMS message, and this message M uses the session key Kca that consults between user A and the safe short message service server to encrypt, and obtains message ciphertext C1.C1=EKca (M), C1 at first is sent to safe short message service server;
In second step, safe short message service server is received this ciphertext C1, to message C1 deciphering, obtains M, M=DKca (C1) with session key Kca;
In the 3rd step, safe short message service server is encrypted clear-text message M with the session key Kcb of user B, obtain ciphertext C2, C2=EKcb (M);
The 4th one, safe short message service server sends to user B with ciphertext C2, and user B uses Kcb that C2 is decrypted, and obtains M.M＝DKcb(C2)；
Here E and D represent the encryption and decryption operation in the symmetric cryptography respectively.
So far, short message M,, is existed with the ciphertext form in transmission course to user B all the time by user A safe transmission, has prevented that message content is stolen and leaks.Adopt safe short message service server to carry out short message and land deciphering and encrypt to transmit, processing procedure is transparent to the user, by server storage and uniform user's session key, has solved terminal use's cipher key management considerations simultaneously.
3, short message safe storage: encrypt storage according to the organizational form of file cabinet to the short message of encrypting storage demand is arranged.It is as follows to use the encrypt file cabinet to encrypt storing step:
The first step is set up the file cabinet structure.The memory space that safe SIM card will be blocked is divided into some groups by the form of file cabinet.
In second step, the user is provided with file cabinet.The corresponding operator password of each file cabinet can only be checked the note in the affiliated encrypt file cabinet of own input operation password when checking note.If forget encrypt file cabinet operator password, need reset this document cabinet, delete All Files and information in this encrypt file cabinet simultaneously.
In the 3rd step, the note of receiving number is stored according to file cabinet, and the user has only the operator password of this cabinet correspondence of input just can check note.
For example, the user is provided with password 12345678 corresponding No. 1 file cabinets, deposits note 1 and note 2 under No. 1 file cabinet.Password 87654321 corresponding No. 2 file cabinets are set, under No. 2 file cabinets, deposit note 3 and note 4, as shown in Figure 4.
When user's input operation password 12345678, can only see note 1 and 2; Note 3 and 4 couples of users are sightless.In like manner, when user's input operation key 87654321, note 1 and 2 couples of users are sightless.So just greatly guaranteed storage security,, also can can't obtain effective encryption short message because of the classification and the restriction of operator password even others uses this mobile phone.
Claims (4)
1. the short message two-stage encryption based on the safety SIM card transmits and method for secure storing, it is characterized in that: this method comprises the short message encrypted transmission and encrypts two steps of storage:
1), short message encrypted transmission step, be divided into two stages to realize:
Phase I, the protocol negotiation by agreement between mobile phone terminal and the safe short message service server goes out session key, and between is set up secure transmission tunnel;
Second stage, mobile phone terminal and safe short message service server are utilized session key that short message is carried out encryption and decryption and are handled, and guarantee that short message is the ciphertext state in the transmission course all the time aloft, expressly land the back at short message and occur;
2), short message encryption storing step is to there being the short message of encrypting storage demand to encrypt storage according to the organizational form of file cabinet, file cabinet grouping number dynamically changeable, the unique identification sign indicating number of file cabinet is its access code, STK uses the password that lands by the user and mates wherein one group of file cabinet automatically, and the user can only check the content of short message that oneself lands under the affiliated encrypt file cabinet of password.
2. short message two-stage encryption transmission and method for secure storing based on the safety SIM card according to claim 1, it is characterized in that: described session key is based on the session key in the public key certificate negotiation short message transmission process, and, may further comprise the steps according to the dynamic online replacing user conversation key of actual user demand:
1), the distribution of public key certificate:
A, certificate server are that safe short message service server and terminal use generate public key certificate separately;
B, certificate server off-line write safe short message service server public key certificate to the safety SIM card;
C, certificate server are notified safe short message service server client public key certificate;
2), session key agreement:
Pass through public key certificate between terminal use and the safe short message service server, realize both sides' authentication, negotiate session key, realize then receiving confidentiality, the authenticity and integrity service that short message transmits between the both sides, the message that key agreement protocol sent is as follows:
C->S：Nc
S->C：PEc(SIGs(Kcs，Nc，Ns))
C->S：Ns
Wherein C represents the portable terminal transmit leg, and S represents safe short message service server recipient; PEc represents the public key encryption with C, and SIGs represents the private key signature with S,
The step that the session key agreement agreement is carried out is as follows:
The first step, the sending direction recipient sends the plaintext authentication request, and request content comprises that terminal produces proof factor Nc;
Second step, safe short message service server is searched the corresponding certificate of this user according to the phone number of portable terminal, and verify this certificate legitimacy to certificate server after, produce a session key Kcs and proof factor Ns, utilize oneself the private key and the encrypted public key of portable terminal Kcs, Ns, Nc are signed and to encrypt, pass to portable terminal then;
The 3rd step, the cipher-text information that portable terminal sends the safety short message service server is carried out DecryptDecryption (earlier test label, use self private key DecryptDecryption again with the PKI of the safe short message service server that prestores), after checking the Nc unanimity, Ns is passed to safe short message service server with plaintext;
In the 4th step, after checking was passed through, portable terminal was passed to safe short message service server with Ns, and server compares the Ns that receives and original Ns, and affirmation is consulted successfully.
3. short message two-stage encryption transmission and method for secure storing based on the safety SIM card according to claim 1, it is characterized in that: described short message encryption and decryption is handled and is meant that encrypting short message lands decryption processing and encrypt and transmit on the safety short message service server, utilize session key to carry out the short message encryption and decryption and handle, the sending and receiving short messages step is as follows:
The first step, terminal use A is to the terminal use B M that sends SMS message, and this message M uses the session key Kca that consults between user A and the safe short message service server to encrypt, and obtains message ciphertext C1, C1=EKca (M), C1 at first is sent to safe short message service server;
In second step, safe short message service server is received this ciphertext C1, to message C1 deciphering, obtains M, M=DKca (C1) with session key Kca;
In the 3rd step, safe short message service server is encrypted clear-text message M with the session key Kcb of user B, obtain ciphertext C2, C2=EKcb (M);
The 4th one, safe short message service server sends to user B with ciphertext C2, and user B uses Kcb that C2 is decrypted, and obtains M.M＝DKcb(C2)；
Here E and D represent the encryption and decryption operation in the symmetric cryptography respectively;
So far short message M,, is existed with the ciphertext form in transmission course to user B all the time by user A safe transmission.
4. short message two-stage encryption transmission and method for secure storing based on the safety SIM card according to claim 1, it is characterized in that: described short message is encrypted storage and is meant that it is as follows to use the encrypt file cabinet to encrypt storing step to there being the short message of encrypting storage demand to encrypt storage according to the organizational form of file cabinet:
The first step, set up the file cabinet structure: the memory space that safe SIM card will be blocked is divided into each group by the form of file cabinet;
Second step, the user is provided with file cabinet: the corresponding operator password of each file cabinet, can only check the note in the affiliated encrypt file cabinet of own input operation password when checking note, if forget encrypt file cabinet operator password, need reset this document cabinet, delete All Files and information in this encrypt file cabinet simultaneously;
In the 3rd step, the note of receiving number is stored according to file cabinet, and the user has only the operator password of this cabinet correspondence of input just can check note.
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| CN114697008B (en) * | 2020-12-30 | 2024-03-12 | 科大国盾量子技术股份有限公司 | Communication system and method based on quantum security SIM card, quantum security SIM card and key service platform |
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