CN102368850A - Method for carrying out encryption and decryption on video file on mobile phone - Google Patents
Method for carrying out encryption and decryption on video file on mobile phone Download PDFInfo
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- CN102368850A CN102368850A CN2011103101509A CN201110310150A CN102368850A CN 102368850 A CN102368850 A CN 102368850A CN 2011103101509 A CN2011103101509 A CN 2011103101509A CN 201110310150 A CN201110310150 A CN 201110310150A CN 102368850 A CN102368850 A CN 102368850A
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Abstract
The invention provides a method for carrying out encryption and decryption on a video file on a mobile phone. The encryption method comprises the following steps that: step one, a cipher I is input and the cipher I is encrypted to form a ciphertext and the ciphertext is stored in a file in a mobile phone; step two, identity identification numbers of the cipher I and a mobile phone I are combined to form a character string; and step three, the character string is utilized to carry out encryption on a video file by an XOR mode. The decryption method comprises the following steps that: step four, a cipher II is input and encryption is carried out on the cipher II to form an encrypted character string; step five, the file is read and the ciphertext in the file is obtained; it is compared whether the ciphertext is the same as the encrypted character string; if so, go to a step six; if not, a decryption flow is closed; step six, identity identification numbers of the cipher II and a mobile phone II are combined to form a decoded character string. and step seven, the decoded character string is utilized to carry out decryption on the encrypted video file by an XOR mode. According to the invention, an encryption method for a video file on a mobile phone is realized; when a video is needed to be watched, watching can be carried out only when authentication is succeeded, so that individual privacy of the user is protected.
Description
[technical field]
The present invention relates to the communication apparatus technical field, relate in particular to a kind of method of on mobile phone, carrying out video file encryption and deciphering.
[background technology]
At present encryption technology has reversible encryption and irreversible encryption, and reversible encryption can have under the situation of decruption key, ciphertext is transferred to expressly, like AES etc.; Irreversible encryption then is that close side can not return expressly, encrypts like md5.
Along with mobile phone is more and more universal, watch video also to become a kind of fashion on the mobile phone, nowadays the memory capacity of mobile phone is also continuing to increase, and watches a critical function that also becomes on the mobile phone when needed at store video on the mobile phone.But mobile phone is as a personal objects, and it is steady private that the video on the mobile phone possibly relate to the individual, the method that does not have clear and definite video-encryption of prior art, and especially the method to video-encryption does not realize yet on mobile phone.How after mobile phone was borrowed other people or mobile phone and lost situation such as being obtained the back by other people, the video on the mobile phone was unlikely to be watched by other people, thereby the steady private target of protection individual becomes the problem that current society need solves.
Provide a kind of in the prior art and realized the static audio/video document encryption method through file content is carried out the code word data matching way; And a kind of decryption method is provided to this encryption method; As open day was on 01 14th, 2009; Publication number is the Chinese patent of CN101345866; Its characteristic point is: the static audio/video document encryption method may further comprise the steps: a. inserts extra-code at the compressed file head, and said extra-code comprises and shows zero-time, shows concluding time, encryption indicator, encryption code word; The compressed file that b. will insert extra-code splits into the raw data packets of regular length; C. after convolution being carried out in each raw data packets segmentation, carry out XOR with the encryption code word again, generate encrypted packets; D. said encryption code word is embedded the fixed position of encrypted packets, generate new data file encryption.The static audio/video document decryption method is corresponding to adopt inverse operation to get final product.Adopt this inventive method, the amount of calculation of encryption is little, is applicable to the master chip of the television set that arithmetic speed is slower; Its encryption method is to be applicable to static audio/video document.
[summary of the invention]
The technical problem that the present invention will solve; Be to provide a kind of method of on mobile phone, video file being carried out encryption and decryption; When the user need watch video, carry out subscriber authentication earlier, checking through after carry out mobile phone again identify label number checking just can watch video file.
The present invention is achieved in that a kind of method of on mobile phone, carrying out video file encryption and deciphering,
Said video file encryption method comprises the steps:
Said video file decryption method comprises the steps:
Further, the identify label of said mobile phone one and said mobile phone No. two is IMEI or IMSI.
The present invention has following advantage: method of on mobile phone, carrying out video file encryption and deciphering of the present invention; Its encryption method is: the password of earlier user being imported carries out the mode of md5 and encrypts the formation ciphertext; And then the identify label of password and mobile phone number combined to form a character string, utilize character string video file to be encrypted through the XOR mode.Its decryption method is: the clear crytpographic key of when the user need decipher, importing carries out the mode of md5 and encrypts formation one encrypted characters string; This encrypted characters string and ciphertext are compared; Be that identical then subscriber authentication is passed through, and then with clear crytpographic key with this moment mobile phone identify label number combines to form the character string of decoding; The character of will decoding was ganged up the XOR mode encrypted video file was deciphered.Can carry out cipher round results to the video file on the mobile phone through method of the present invention, in the time will deciphering, carry out subscriber authentication earlier, and then carry out the identify label number checking of mobile phone, it could realize the broadcast of video after dual checking; Its video file and mobile phone are bound, and when other people trial is deciphered to another mobile phone through duplicating current encrypted video file, even if the user knows password, also will damage this video file during deciphering, reach protection video file purpose; When in authentication process itself, repeatedly attempting the deciphering failure, also be unlikely to damage the video file of encryption, thus protection user's privacy video.
[description of drawings]
Fig. 1 is the schematic flow sheet of video file encryption method of the present invention.
Fig. 2 is the schematic flow sheet of video file decryption method of the present invention.
[embodiment]
See also illustrated in figures 1 and 2, a kind of method of on mobile phone, carrying out video file encryption and deciphering of the present invention, wherein
Said video file encryption method comprises the steps:
Said video file decryption method comprises the steps:
Below in conjunction with two specific embodiments the present invention is described further.
Embodiment one: Zhang San copies to encrypted video file in Li Si's the mobile phone in oneself the mobile phone and has obtained the password of this encrypted video file.
Said video file encryption method comprises the steps:
1, when Li Si imports password A (like feng123) on hand-held i Phone, this password A is carried out md5 encrypt generation one ciphertext B, and this ciphertext B is stored among the file M of i Phone;
2, said password A is combined to form a character string A3D124 with the identify label IMSI (like 3D124) of said i Phone;
3, the video file X that said character string A3D124 is encrypted needs through the XOR mode encrypts, and generation encrypted video file Y also is stored in the i Phone;
Said video file decryption method comprises the steps:
4, encrypted video file Y after its Zhang San will encrypt and file M copy in the Samsung mobile phone of oneself; And obtained password A (feng123); When Zhang San imports password feng123 on the Samsung mobile phone, this password A is carried out md5 encrypt generation one encrypted characters string C;
5, read said file M and obtain the ciphertext B described in the file M, relatively whether this ciphertext B is identical with said encrypted characters string C, is identical at this moment, and then subscriber authentication is passed through, and gets into step 6;
6, password A is combined to form a decoding character string A6D521 (being feng1236D521) with the identify label IMSI (like 6D521) of said Samsung mobile phone;
7, said decoding character string A6D521 is deciphered said encrypted video file Y through the XOR mode; The identify label of the identify label of its Zhang San's Samsung mobile phone number and Li Si's i Phone is number different, and then the video file after the deciphering damages and can't play.
Embodiment two: encrypted video file in Li Si's the mobile phone, when Li Si wants to open encrypted video file, deciphered.
Said video file encryption method comprises the steps:
1, when Li Si imports password A (like feng123) on hand-held i Phone, this password A is carried out md5 encrypt generation one ciphertext B, and this ciphertext B is stored among the file M of i Phone;
2, said password A is combined to form a character string A3D124 with the identify label IMSI (like 3D124) of said i Phone;
3, the video file X that said character string A3D124 is encrypted needs through the XOR mode encrypts, and generation encrypted video file Y also is stored in the i Phone;
Said video file decryption method comprises the steps:
4, when Li Si wants to open encrypted video file, decipher, when it imports password feng123 on i Phone, this password A is carried out md5 encrypt generation one encrypted characters string C;
5, read said file M and obtain the ciphertext B described in the file M, relatively whether this ciphertext B is identical with said encrypted characters string C, is identical at this moment, and then subscriber authentication is passed through, and gets into step 6;
6, password A is combined to form a decoding character string A3D124 (being feng1233D124) with the identify label IMSI (like 3D124) of said i Phone;
7, said decoding character string A3D124 is deciphered said encrypted video file Y through the XOR mode; What its Li Si used is that same mobile phone carries out encryption and decryption, so the video file of successful decryption after generating the video file after the deciphering and playing said deciphering;
The above is merely preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Claims (2)
1. method of on mobile phone, carrying out video file encryption and deciphering is characterized in that:
Said video file encryption method comprises the steps:
Step 10, this password one is carried out md5 encrypt and generate a ciphertext, and this ciphertext is stored in the file of mobile phone one for the moment when user's input password on hand-held mobile phone one;
Step 11, the identify label of said password one and said mobile phone No. one is combined to form a character string;
Step 12, the video file that said character string is encrypted needs through the XOR mode are encrypted, and generate encrypted video file and also are stored in the mobile phone one;
Said video file decryption method comprises the steps:
Step 20, when the user on hand-held mobile phone two during input password two, this password two is carried out md5 encrypts and generate an encrypted characters string;
Step 21, read said file and obtain the ciphertext described in the file, relatively whether this ciphertext is identical with said encrypted characters string, is, then subscriber authentication is passed through, and gets into step 22; Not, then point out the user to input the password mistake, and finish this deciphering flow process;
Step 22, the identify label of password two and said mobile phone No. two is combined to form a decoding character string;
Step 23, the XOR mode ganged up in said decoding character said encrypted video file was deciphered; If the identify label of the identify label of said mobile phone No. one and said mobile phone is No. two identical; Then mobile phone one is same mobile phones with mobile phone two, the video file after successful decryption generates the video file after the deciphering and plays said deciphering; Inequality, then mobile phone one is different mobile with mobile phone two, and the video file after the deciphering damages and can't play.
2. method of on mobile phone, carrying out video file encryption and deciphering according to claim 1 is characterized in that: the identify label of said mobile phone one and said mobile phone No. two is IMEI or IMSI.
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| CN2011103101509A CN102368850A (en) | 2011-10-13 | 2011-10-13 | Method for carrying out encryption and decryption on video file on mobile phone |
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| CN2011103101509A CN102368850A (en) | 2011-10-13 | 2011-10-13 | Method for carrying out encryption and decryption on video file on mobile phone |
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Cited By (9)
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| CN102647712A (en) * | 2012-04-06 | 2012-08-22 | 惠州Tcl移动通信有限公司 | Mobile phone data encryption method and decryption method |
| CN102750495A (en) * | 2012-06-07 | 2012-10-24 | 北京锐安科技有限公司 | System for cracking and restoring iPhone encrypted backup files |
| CN102867153A (en) * | 2012-08-30 | 2013-01-09 | 腾讯科技（深圳）有限公司 | Methods and devices for encrypting and decrypting video file and mobile terminal |
| CN104125055A (en) * | 2014-06-25 | 2014-10-29 | 小米科技有限责任公司 | Encryption and decryption method and electronic device |
| CN106209359A (en) * | 2016-07-14 | 2016-12-07 | 北京白鹭时代信息技术有限公司 | A kind of decoding and the method and device decompressing encrypted lottery bag |
| CN106791249A (en) * | 2016-11-11 | 2017-05-31 | 天津光电通信技术有限公司 | A kind of LED display display control program |
| CN107317804A (en) * | 2017-06-19 | 2017-11-03 | 努比亚技术有限公司 | Private clound encryption data access method, terminal and storage medium |
| CN107682303A (en) * | 2016-08-02 | 2018-02-09 | 北京宸信征信有限公司 | Personal sensitive information encrypted query system and method |
| CN117196378A (en) * | 2023-08-22 | 2023-12-08 | 江苏重华数字科技有限公司 | Highway engineering full-period integrated quality data transmission and traceability processing method |
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| CN102647712A (en) * | 2012-04-06 | 2012-08-22 | 惠州Tcl移动通信有限公司 | Mobile phone data encryption method and decryption method |
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| CN104125055A (en) * | 2014-06-25 | 2014-10-29 | 小米科技有限责任公司 | Encryption and decryption method and electronic device |
| CN104125055B (en) * | 2014-06-25 | 2017-11-14 | 小米科技有限责任公司 | Encryption and decryption method and electronic equipment |
| CN106209359A (en) * | 2016-07-14 | 2016-12-07 | 北京白鹭时代信息技术有限公司 | A kind of decoding and the method and device decompressing encrypted lottery bag |
| CN107682303A (en) * | 2016-08-02 | 2018-02-09 | 北京宸信征信有限公司 | Personal sensitive information encrypted query system and method |
| CN107682303B (en) * | 2016-08-02 | 2020-11-10 | 北京宸信征信有限公司 | System and method for encrypting and inquiring personal sensitive information |
| CN106791249A (en) * | 2016-11-11 | 2017-05-31 | 天津光电通信技术有限公司 | A kind of LED display display control program |
| CN107317804A (en) * | 2017-06-19 | 2017-11-03 | 努比亚技术有限公司 | Private clound encryption data access method, terminal and storage medium |
| CN117196378A (en) * | 2023-08-22 | 2023-12-08 | 江苏重华数字科技有限公司 | Highway engineering full-period integrated quality data transmission and traceability processing method |
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Application publication date: 20120307 |