CN103259652B - A kind of information decryption method based on timeliness parameter - Google Patents
A kind of information decryption method based on timeliness parameter Download PDFInfo
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- CN103259652B CN103259652B CN201210139419.6A CN201210139419A CN103259652B CN 103259652 B CN103259652 B CN 103259652B CN 201210139419 A CN201210139419 A CN 201210139419A CN 103259652 B CN103259652 B CN 103259652B
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Abstract
The invention discloses a kind of information decryption method based on timeliness parameter belonging to decoding technique field.It comprises the following steps: 1) carry out compose operation to A random code and B random code and obtain kind of a subcode, carries out compose operation obtain system timeliness parameter K to kind of subcode; 2) user's timeliness parameter is produced according to system timeliness parameter; 3) work limitation parameter is produced according to user's timeliness parameter; 4) use work limitation parameter as key, process is decrypted to enciphered message.Beneficial effect of the present invention is: the present invention uses work limitation parameter to be decrypted information, thus enhances the fail safe of acquisition of information, meanwhile, the invention enables user can only could acquisition information in official hour; Greatly reduce the possibility of information leakage.<!--1-->
Description
Technical field
The invention belongs to decoding technique field, particularly a kind of information decryption method based on timeliness parameter.
Background technology
In satellite navigation system or other communication systems, usually can set up the flow process of encrypt and decrypt, the data transmission security between user and satellite (or other devices) can be ensured like this.The data that satellite or other devices issue user are the data of encrypting, and now the handheld terminal of user is provided with corresponding decrypted program, and user, to after above-mentioned decrypts information, just can receive corresponding data.
In above-mentioned communication system, corresponding decrypted program does not have time restriction, and user can use at any time; And in some cases, needing classification to set the authority of user, user only has (by its authority) in official hour that decrypted program could be used to be decrypted information, and beyond official hour, user haves no right to use decrypted program.At this moment, existing satellite navigation system or other communication systems can not meet this requirement.
Summary of the invention
The present invention is directed to above-mentioned defect and disclose a kind of information decryption method based on timeliness parameter, it comprises the following steps:
1) compose operation is carried out to A random code and B random code and obtain kind of a subcode, compose operation is carried out to kind of subcode and obtains system timeliness parameter K;
2) user's timeliness parameter is produced according to system timeliness parameter;
The order arrangement successively of first memory cell, the second memory cell, the 3rd memory cell and the 4th memory cell, the data sequence arrangement of above four cell stores just forms user's timeliness parameter;
Encode to the X time, be encoded to 16 ary codes: KLMN by X, this 16 ary codes is without symbol short, and its length is 2 bytes;
Above-mentioned 16 codes processed are carried out cascade 8 times, forms the character string that a length equals 16 bytes, use P here
xrepresent; Then, using system timeliness parameter as working key, adopt aes algorithm to P
xbe encrypted the character string C obtaining 16 bytes
x, i.e. C
x=AES (P
x, K); Stored in KLMN in the first memory cell, the second memory cell is stored in data 00, and the 3rd stores list stored in data 00, and the 4th memory cell is stored in data C
x, now the data sequence arrangement of four cell stores is with regard to structure adult human user timeliness parameter;
Encode to Y month, by being encoded to 16 system character string: PQ Y month, then 16 system character strings of X Y month correspondence are: the length of KLMNPQ, PQ is 1 byte, and its value is 00-0c, and wherein 01-0c represents January respectively to December; KLMNPQ is carried out cascade and obtain a character string for 5 times, the afterbody cascade 16 system character string by this character string: PQ, finally obtains the character string that a length is 16 bytes, uses PP here
xYrepresent;
By C
xas working key, adopt aes algorithm to PP
xYbe encrypted the character string CC obtaining 16 bytes
xY, i.e. CC
xY=AES (PP
xY, C
x); Stored in KLMN in the first memory cell, the second memory cell is stored in data PQ, and the 3rd stores list stored in data 00, and the 4th memory cell is stored in data CC
xY, the now data sequence arrangement of four cell stores just forms moon user timeliness parameter;
Z week is encoded, by being encoded to 16 system character string: ST Z week, the 16 system character strings that then X Y month Z week is corresponding are: KLMNPQST, the length of ST is 1 byte, its value is 00-04, and wherein 01-04 represents the 1st thoughtful 4th week respectively, KLMNPQST is carried out cascade 4 times, obtain the character string that a length is 16 bytes, use PPP here
xYZrepresent;
By CC
xYas working key, adopt aes algorithm to PPP
xYZbe encrypted the character string CCC obtaining 16 bytes
xYZ, i.e. CC
xYZ=AES (PPP
xYZ, CC
xY); Stored in KLMN in the first memory cell, the second memory cell is stored in data PQ, and the 3rd stores list stored in data ST, and the 4th memory cell is stored in data CCC
xYZ; , the now data sequence arrangement of four cell stores just forms all user's timeliness parameters;
3) work limitation parameter is produced according to user's timeliness parameter;
According to current time, judge time corresponding to user's timeliness parameter whether in effective time section, namely judge whether current time belongs to time corresponding to user's timeliness parameter;
If judged result is no, then terminate; If the determination result is YES, then according to step 2) dispersion treatment is carried out to user's timeliness parameter, obtain year user's timeliness parameter, moon user timeliness parameter and all user's timeliness parameters;
Year user timeliness parameter, moon user timeliness parameter and all user's timeliness parameters are activated, obtains work limitation parameter;
4) use work limitation parameter as key, process is decrypted to enciphered message.
The length of the data of described 4th cell stores is 16 bytes, 24 bytes or 32 bytes.
Beneficial effect of the present invention is: the present invention uses work limitation parameter to be decrypted information, thus enhances the fail safe of acquisition of information, meanwhile, the invention enables user can only could acquisition information in official hour; Greatly reduce the possibility of information leakage.
Accompanying drawing explanation
Fig. 1 is workflow diagram of the present invention;
Fig. 2 is the memory cell schematic diagram of user's timeliness parameter.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.It is emphasized that following explanation is only exemplary, instead of in order to limit the scope of the invention and apply.
As shown in Figure 1, a kind of information decryption method based on timeliness parameter comprises the following steps:
1) compose operation is carried out to A random code and B random code and obtain kind of a subcode, compose operation is carried out to kind of subcode and obtains system timeliness parameter K;
2) user's timeliness parameter is produced according to system timeliness parameter;
As shown in Figure 2, the order arrangement successively of the first memory cell, the second memory cell, the 3rd memory cell and the 4th memory cell, the data sequence arrangement of above four cell stores just forms user's timeliness parameter;
Encode to the X time, be encoded to 16 ary codes: KLMN by X, this 16 ary codes is without symbol short, and its length is 2 bytes;
Above-mentioned 16 codes processed are carried out cascade 8 times, forms the character string that a length equals 16 bytes, use P here
xrepresent; Then, using system timeliness parameter as working key, adopt aes algorithm to P
xbe encrypted the character string C obtaining 16 bytes
x, i.e. C
x=AES (P
x, K); Stored in KLMN in the first memory cell, the second memory cell is stored in data 00, and the 3rd stores list stored in data 00, and the 4th memory cell is stored in data C
x, now the data sequence arrangement of four cell stores is with regard to structure adult human user timeliness parameter;
The production process of the year user Ageing Treatment parameter of such as 2007 is as follows:
X＝”07D7”，P
X＝”07D707D707D707D707D707D707D707D7”
C
X＝AES(P
X,K),
Then the year user Ageing Treatment parameter of 2007 is
| 07D7 | 00 | 00 | C X |
Encode to Y month, by being encoded to 16 system character string: PQ Y month, then 16 system character strings of X Y month correspondence are: the length of KLMNPQ, PQ is 1 byte, and its value is 00-0c, and wherein 01-0c represents January respectively to December; KLMNPQ is carried out cascade and obtain a character string for 5 times, the afterbody cascade 16 system character string by this character string: PQ, finally obtains the character string that a length is 16 bytes, uses PP here
xYrepresent;
By C
xas working key, adopt aes algorithm to PP
xYbe encrypted the character string CC obtaining 16 bytes
xY, i.e. CC
xY=AES (PP
xY, C
x); Stored in KLMN in the first memory cell, the second memory cell is stored in data PQ, and the 3rd stores list stored in data 00, and the 4th memory cell is stored in data CC
xY, the now data sequence arrangement of four cell stores just forms moon user timeliness parameter;
The generation of the moon user Ageing Treatment parameter in such as in March, 2007
PP
XY＝”07D70307D70307D70307D70307D70303”
CC
XY＝AES(PP
XY,C
X),
Then the year user Ageing Treatment parameter of 2007 is
| 07D7 | 03 | 00 | CC XY |
Z week is encoded, by being encoded to 16 system character string: ST Z week, the 16 system character strings that then X Y month Z week is corresponding are: KLMNPQST, the length of ST is 1 byte, its value is 00-04, and wherein 01-04 represents the 1st thoughtful 4th week (set 4th week herein and extend to last day of this month) respectively, KLMNPQST is carried out cascade 4 times, obtain the character string that a length is 16 bytes, use PPP here
xYZrepresent;
By CC
xYas working key, adopt aes algorithm to PPP
xYZbe encrypted the character string CCC obtaining 16 bytes
xYZ, i.e. CC
xYZ=AES (PPP
xYZ, CC
xY); Stored in KLMN in the first memory cell, the second memory cell is stored in data PQ, and the 3rd stores list stored in data ST, and the 4th memory cell is stored in data CCC
xYZ; , the now data sequence arrangement of four cell stores just forms all user's timeliness parameters;
The generation of all user's Ageing Treatment parameters of the 1st week in such as in March, 2007
PPP
XYZ＝”07D7030107D7030107D7030107D70301”
CCC
XYZ＝AES(PPP
XYZ,C
XY),
Then the year user Ageing Treatment parameter of 2007 is
| 07D7 | 03 | 01 | CCC XYZ |
3) work limitation parameter is produced according to user's timeliness parameter;
According to current time, judge time corresponding to user's timeliness parameter whether in effective time section, namely judge whether current time belongs to time corresponding to user's timeliness parameter;
If judged result is no, then terminate; If the determination result is YES, then according to step 2) dispersion treatment is carried out to user's timeliness parameter, obtain year user's timeliness parameter, moon user timeliness parameter and all user's timeliness parameters;
Year user timeliness parameter, moon user timeliness parameter and all user's timeliness parameters are activated, obtains work limitation parameter;
4) use work limitation parameter as key, process is decrypted to enciphered message.
The length of the data of the 4th cell stores is 16 bytes, 24 bytes or 32 bytes.
Claims (2)
1. based on an information decryption method for timeliness parameter, it is characterized in that, it comprises the following steps:
1) compose operation is carried out to A random code and B random code and obtain kind of a subcode, compose operation is carried out to kind of subcode and obtains system timeliness parameter K;
2) user's timeliness parameter is produced according to system timeliness parameter;
The order arrangement successively of first memory cell, the second memory cell, the 3rd memory cell and the 4th memory cell, the data sequence arrangement of above four cell stores just forms user's timeliness parameter;
Encode to the X time, be encoded to 16 ary codes: KLMN by X, this 16 ary codes is without symbol short, and its length is 2 bytes;
Above-mentioned 16 codes processed are carried out cascade 8 times, forms the character string that a length equals 16 bytes, use P here
xrepresent; Then, using system timeliness parameter as working key, adopt aes algorithm to P
xbe encrypted the character string C obtaining 16 bytes
x, i.e. C
x=AES (P
x, K); Stored in KLMN in the first memory cell, the second memory cell is stored in data 00, and the 3rd stores list stored in data 00, and the 4th memory cell is stored in data C
x, now the data sequence arrangement of four cell stores is with regard to structure adult human user timeliness parameter;
Encode to Y month, by being encoded to 16 system character string: PQ Y month, then 16 system character strings of X Y month correspondence are: the length of KLMNPQ, PQ is 1 byte, and its value is 00-0c, and wherein 01-0c represents January respectively to December; KLMNPQ is carried out cascade and obtain a character string for 5 times, the afterbody cascade 16 system character string by this character string: PQ, finally obtains the character string that a length is 16 bytes, uses PP here
xYrepresent;
By C
xas working key, adopt aes algorithm to PP
xYbe encrypted the character string CC obtaining 16 bytes
xY, i.e. CC
xY=AES (PP
xY, C
x); Stored in KLMN in the first memory cell, the second memory cell is stored in data PQ, and the 3rd stores list stored in data 00, and the 4th memory cell is stored in data CC
xY, the now data sequence arrangement of four cell stores just forms moon user timeliness parameter;
Z week is encoded, by being encoded to 16 system character string: ST Z week, the 16 system character strings that then X Y month Z week is corresponding are: KLMNPQST, the length of ST is 1 byte, its value is 00-04, and wherein 01-04 represents the 1st thoughtful 4th week respectively, KLMNPQST is carried out cascade 4 times, obtain the character string that a length is 16 bytes, use PPP here
xYZrepresent;
By CC
xYas working key, adopt aes algorithm to PPP
xYZbe encrypted the character string CCC obtaining 16 bytes
xYZ, i.e. CC
xYZ=AES (PPP
xYZ, CC
xY); Stored in KLMN in the first memory cell, the second memory cell is stored in data PQ, and the 3rd stores list stored in data ST, and the 4th memory cell is stored in data CCC
xYZ, the now data sequence arrangement of four cell stores just forms all user's timeliness parameters;
3) work limitation parameter is produced according to user's timeliness parameter;
According to current time, judge time corresponding to user's timeliness parameter whether in effective time section, namely judge whether current time belongs to time corresponding to user's timeliness parameter;
If judged result is no, then terminate; If the determination result is YES, then according to step 2) dispersion treatment is carried out to user's timeliness parameter, obtain year user's timeliness parameter, moon user timeliness parameter and all user's timeliness parameters;
Year user timeliness parameter, moon user timeliness parameter and all user's timeliness parameters are activated, obtains work limitation parameter;
4) use work limitation parameter as key, process is decrypted to enciphered message.
2. a kind of information decryption method based on timeliness parameter according to claim 1, is characterized in that, the length of the data of described 4th cell stores is 16 bytes, 24 bytes or 32 bytes.
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| CN103259652B true CN103259652B (en) | 2015-12-16 |
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| CN101833629B (en) * | 2009-03-11 | 2011-10-26 | 南京理工大学 | Software area authorization encryption method and implementing device therefor |
| CN102012993B (en) * | 2010-11-29 | 2012-07-11 | 北京卓微天成科技咨询有限公司 | Methods and devices for selectively encrypting and decrypting data |
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Effective date of registration: 20220106 Address after: 101399 room 1115, 6 Anfu street, Houshayu Town, Shunyi District, Beijing Patentee after: Jiaoxin Beidou Technology Co.,Ltd. Patentee after: CHINA TRANSPORT TELECOMMUNICATIONS AND INFORMATION CENTER Address before: 100011 rear body of Chaoyang District foreign and foreign embassy in Beijing Patentee before: CHINA TRANSPORT TELECOMMUNICATIONS AND INFORMATION CENTER |
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Effective date of registration: 20230425 Address after: 100011 No. 1, back of Andingmen Waiguan, Chaoyang District, Beijing Patentee after: CHINA TRANSPORT TELECOMMUNICATIONS AND INFORMATION CENTER Address before: 101399 room 1115, 6 Anfu street, Houshayu Town, Shunyi District, Beijing Patentee before: Jiaoxin Beidou Technology Co.,Ltd. Patentee before: CHINA TRANSPORT TELECOMMUNICATIONS AND INFORMATION CENTER |