CN110730366B - Bit operation-based lightweight video stream encryption and decryption method and encryption and decryption method - Google Patents
Bit operation-based lightweight video stream encryption and decryption method and encryption and decryption method Download PDFInfo
- Publication number
- CN110730366B CN110730366B CN201911041106.5A CN201911041106A CN110730366B CN 110730366 B CN110730366 B CN 110730366B CN 201911041106 A CN201911041106 A CN 201911041106A CN 110730366 B CN110730366 B CN 110730366B
- Authority
- CN
- China
- Prior art keywords
- data
- key
- video data
- encryption
- video
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000011664 signaling Effects 0.000 claims abstract description 7
- 238000013467 fragmentation Methods 0.000 claims description 3
- 238000006062 fragmentation reaction Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013478 data encryption standard Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving video stream encryption
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
- H04L9/0643—Hash functions, e.g. MD5, SHA, HMAC or f9 MAC
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- Computing Systems (AREA)
- General Engineering & Computer Science (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a bit operation-based lightweight video stream encryption and decryption method and an encryption and decryption method, and particularly relates to a bit operation-based lightweight video stream encryption method, wherein the encryption process of encrypting plaintext video data to obtain encrypted video data based on a bit operation mode comprises the following steps: generating a random feature key plaintext data, and encrypting the feature key plaintext data through md5 to generate feature key ciphertext data; the feature key ciphertext data is exchanged to a video stream receiving side through a network signaling channel; the technical scheme adopted by the invention is as follows: 1. compared with the traditional encryption method, the video stream mode based on bit operation is simpler and more portable. 2. The invention is more efficient for encrypting the real-time video stream due to the simple encryption mode and the simple bit operation method. 3. The invention also ensures the security of the video stream, steals all key files in time, and only the un-cracked encryption method and the un-cracked characteristic key ciphertext data are used, so that the video encryption data are still secure.
Description
Technical Field
The invention relates to the technical field of video stream encryption and decryption, in particular to a bit operation-based lightweight video stream encryption and decryption method and an encryption and decryption method.
Background
In the current network information era, the security and confidentiality of data, such as monitoring videos, video on demand, video conferences and the like, are particularly concerned. Conventional Encryption algorithms such as des (data Encryption standard) and aes (advanced Encryption standard) mainly use keys to perform complex calculation and replacement on data to achieve data Encryption, but for video stream data with huge data volume, the conventional Encryption algorithms ensure security, but are difficult to implement on software in Encryption speed, and increase media data volume after Encryption. Conventional encryption algorithms are not and are not suitable in terms of video streaming. Therefore, a bit operation-based lightweight video stream encryption and decryption method and an encryption and decryption method are provided, so that efficient encryption and decryption are achieved, and meanwhile the safety of data is guaranteed.
Disclosure of Invention
Aiming at the problems in the background technology, the invention provides a bit operation-based lightweight video stream encryption and decryption method and an encryption and decryption method, which can achieve high-efficiency encryption and decryption and simultaneously ensure the safety of data.
The invention provides a bit operation-based lightweight video stream encryption method, which is characterized in that an encryption process of encrypting plaintext video data to obtain encrypted video data based on a bit operation mode is as follows:
step 1.1, generating a random feature key plaintext data, and encrypting the feature key plaintext data through md5 to generate feature key ciphertext data; the feature key ciphertext data is exchanged to a video stream receiving side through a network signaling channel;
step 1.2, generating n different key files, and performing bit operation on the n different key files by using the feature key plaintext data to generate n new different feature key files;
step 1.3, dividing m video data blocks with the same data length for each frame by taking one frame of frame data as basic data for the video stream naked code data H264; then, using n new different feature key files generated in the step 1.2 to perform bit operation on m video data blocks of each frame to generate new ciphertext H264 frame video data;
and step 1.4, encapsulating the video data of the ciphertext H264 frame into an RTP packet and sending the RTP packet to a receiving end.
Based on the bit-operation-based lightweight video stream encryption method, the invention also provides a decryption method corresponding to the bit-operation-based lightweight video stream encryption method, and the decryption process for obtaining plaintext video data by reversely operating ciphertext video data is as follows:
step 2.1, copying the n different key files to a memory of a video stream receiving side;
2.2, receiving the feature key ciphertext data from the network signaling exchange channel, and decrypting the feature key ciphertext data by using an md5 method to obtain feature key plaintext data;
step 2.3, bit operation is carried out on n different key files by using the feature key plaintext data to generate n new different feature key files;
and 2.4, receiving an RTP packet from the network, splitting and combining the RTP packet to obtain encrypted ciphertext H264 frame data, dividing each frame of video data into m video data blocks, and finally performing bit operation decryption on the m video data blocks by using n new different feature key files to obtain plaintext H264 frame data.
The invention provides a bit operation-based lightweight video stream encryption and decryption method, which comprises the following steps:
step 1, taking a byte from the feature key plaintext data, taking an integer with a numeric range of-256 to 256, taking a random number from the data in the range, and generating the feature key plaintext data;
step 2, encrypting the feature key plaintext data by an md5 method to generate corresponding feature key ciphertext data;
step 3, taking 128 bytes from the key file, randomly generating 128 random integers according to the value range of each byte from-256 to 256; taking 1500 bytes according to the MTU value of the network, and then the corresponding key file is 1500/128 at most to 12; a different key file can be used for each video data block to complete encryption;
step 4, taking 128 bytes of the frame data video data block; the encryption mode is the first, 12 key files are numbered from 1 to 12, if 12 video data blocks exist in frame data and are numbered from 1 to 12, the number of the frame data video data block is encrypted by the number of the key file 1, the number of the frame data video data block is encrypted by the number of the key file 2, and the like, the frame data video data block is encrypted in a one-to-one matching and corresponding mode; if the number of the frame data video data blocks is less than 12, only the files numbered in front of the key file and the video data blocks are correspondingly encrypted in a one-to-one matching mode; in the second encryption mode, the number of the key files is less than 12, and if the number of the frame data video data blocks is greater than the number of the key files, the key files are selected in a multi-polling mode;
step 5, encryption modes of the key file and the video data blocks are adopted, and the key file of 128 bytes and the video data blocks of 128 bytes are subjected to bit inversion operation in a byte-to-byte correspondence mode; if the number of the video data block bytes is less than 128, the video data block is not supplemented with bytes, and the amount of data is encrypted;
step 6, after the frame data encrypted data are obtained, packaging an RTP packet according to a standard H264 fragmentation rule;
and 7, decrypting, performing inverse operation on all the ciphertexts to obtain plaintext data, and finally obtaining the plaintext video stream.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with the traditional encryption method, the video stream mode based on bit operation is simpler and more portable.
2. The invention is more efficient for encrypting the real-time video stream due to the simple encryption mode and the simple bit operation method.
3. The invention also ensures the security of the video stream, steals all key files in time, and only the un-cracked encryption method and the un-cracked characteristic key ciphertext data are used, so that the video encryption data are still secure.
Drawings
FIG. 1 is a schematic block diagram of bit-based lightweight video stream encryption in the present invention;
fig. 2 is a schematic block diagram of bit-based lightweight video stream decryption in the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first objective of the present invention is to provide a bit-based lightweight video stream encryption method, and referring to fig. 1, a simple bit-based encryption process for encrypting plaintext video data to obtain encrypted video data is illustrated as follows:
step 1, generating a random feature key plaintext data, and encrypting the feature key plaintext data through md5 to generate feature key ciphertext data. The feature key ciphertext data is exchanged to the video stream receiving side through a network signaling channel.
And 2, generating n different key files, and performing bit operation on the n different key files by using the feature key plaintext data to generate n new different feature key files.
And 3, dividing m video data blocks with the same data length for each frame by taking one frame of frame data as basic data for the video stream naked code data H264. And then, performing bit operation on m video data blocks per frame by using n new different feature key files generated in the step 2 to generate new ciphertext H264 frame video data.
And 4, encapsulating the encrypted H264 frame video data into an RTP packet and sending the RTP packet to a receiving end.
The second objective of the present invention is to provide a decryption method corresponding to the bit-arithmetic-based lightweight video stream encryption method, and referring to fig. 2, a decryption process for obtaining plaintext video data by inverse-arithmetic ciphertext video data is described as follows:
step 1, copying the n different key files to a memory of a video stream receiving side;
step 2, feature key ciphertext data are received from the network signaling exchange channel, and the feature key ciphertext data are decrypted by using an md5 method to obtain feature key plaintext data;
step 3, bit operation is carried out on n different key files by using the feature key plaintext data to generate n new different feature key files;
step 4, receiving an RTP packet from the network, splitting and combining the RTP packet to obtain encrypted ciphertext H264 frame data, dividing each frame of video data into m video data blocks, and finally performing bit operation decryption on the m video data blocks by using n new different feature key files to obtain plaintext H264 frame data;
the third purpose of the present invention is to set forth a method for encrypting and decrypting a lightweight video stream based on bit arithmetic, which comprises the following steps:
step 1, taking one byte of feature key plaintext data, taking an integer with a numeric range of-256 to 256, taking a random number for the data in the range, and generating the feature key plaintext data;
step 2, encrypting the feature key plaintext data by an md5 method to generate corresponding feature key ciphertext data;
and 3, taking 128 bytes from the key file, randomly generating 128 random integers according to the value range of each byte from-256 to 256. And if the network MTU takes 1500 bytes, the corresponding key file is 1500/128 copies at most. A different key file can be used for each video data block to complete encryption;
and step 4, taking 128 bytes of the frame data video data block. The first encryption mode is that 12 key files are numbered from 1 to 12, if 12 video data blocks exist in frame data and the numbers are 1 to 12, the number 1 of the key file encrypts the number 1 of the frame data video data block, the number 2 of the key file encrypts the number 2 of the frame data video data block, and so on, the encryption is correspondingly performed in a one-to-one matching manner. If the number of the frame data video data blocks is less than 12, only the files with the numbers in front of the key file and the video data blocks are correspondingly encrypted in a one-to-one matching mode. In the second encryption mode, the number of the selected key files is less than 12, and if the number of the frame data video data blocks is greater than the number of the key files, the key files are selected in a multi-polling mode.
And 5, encrypting the key file and the video data blocks, and performing bit inversion operation on the key file of 128 bytes and the video data blocks of 128 bytes in a one-to-one byte correspondence manner. If the number of the video data block bytes is less than 128, the video data block is not supplemented with bytes, and the amount of data is encrypted;
step 6, after the encrypted data of the frame data are obtained, packaging an RTP packet according to a standard H264 fragmentation rule;
and 7, decrypting, namely performing inverse operation on all the ciphertexts to obtain plaintext data, and finally obtaining the plaintext video stream.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principle and embodiments of the present invention have been described herein by way of specific examples, which are provided only to help understand the method and the core idea of the present invention, and the above is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the above technical features can also be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (3)
1. A bit operation-based lightweight video stream encryption method is characterized in that an encryption process for encrypting plaintext video data to obtain encrypted video data based on a bit operation mode is as follows:
step 1.1, generating a random feature key plaintext data, and encrypting the feature key plaintext data through md5 to generate feature key ciphertext data; the feature key ciphertext data is exchanged to a video stream receiving side through a network signaling channel;
step 1.2, generating n different key files, and performing bit operation on the n different key files by using the feature key plaintext data to generate n new different feature key files;
step 1.3, dividing m video data blocks with the same data length for each frame by taking one frame of frame data as basic data for the video stream naked code data H264; then, using n new different feature key files generated in the step 1.2 to perform bit operation on m video data blocks of each frame to generate new ciphertext H264 frame video data;
and step 1.4, encapsulating the video data of the ciphertext H264 frame into an RTP packet and sending the RTP packet to a receiving end.
2. The decryption method corresponding to the bit-operation-based lightweight video stream encryption method according to claim 1, wherein the decryption process for obtaining plaintext video data by performing inverse operation on ciphertext video data is as follows:
step 2.1, copying the n different key files to a memory of a video stream receiving side;
2.2, receiving the feature key ciphertext data from the network signaling exchange channel, and decrypting the feature key ciphertext data by using an md5 method to obtain feature key plaintext data;
step 2.3, bit operation is carried out on n different key files by using the feature key plaintext data to generate n new different feature key files;
and 2.4, receiving an RTP packet from the network, splitting and combining the RTP packet to obtain encrypted ciphertext H264 frame data, dividing each frame of video data into m video data blocks, and finally performing bit operation decryption on the m video data blocks by using n new different feature key files to obtain plaintext H264 frame data.
3. A lightweight video stream encryption and decryption method based on bit operation is characterized by comprising the following steps:
step 1, taking a byte from the feature key plaintext data, taking an integer with a numeric range of-256 to 256, taking a random number from the data in the range, and generating the feature key plaintext data;
step 2, encrypting the feature key plaintext data by an md5 method to generate corresponding feature key ciphertext data;
step 3, taking 128 bytes from the key file, randomly generating 128 random integers according to the value range of each byte from-256 to 256; taking 1500 bytes according to the MTU value of the network, and then the corresponding key file is 1500/128 at most to 12; a different key file can be used for each video data block to complete encryption;
step 4, taking 128 bytes of the frame data video data block; the encryption mode is the first, 12 key files are numbered from 1 to 12, if 12 video data blocks exist in frame data and are numbered from 1 to 12, the number of the frame data video data block is encrypted by the number of the key file 1, the number of the frame data video data block is encrypted by the number of the key file 2, and the like, the frame data video data block is encrypted in a one-to-one matching and corresponding mode; if the number of the frame data video data blocks is less than 12, only the files numbered in front of the key file and the video data blocks are correspondingly encrypted in a one-to-one matching mode; in the second encryption mode, the number of the key files is less than 12, and if the number of the frame data video data blocks is greater than the number of the key files, the key files are selected in a multi-polling mode;
step 5, encryption modes of the key file and the video data blocks are adopted, and the key file of 128 bytes and the video data blocks of 128 bytes are subjected to bit inversion operation in a byte-to-byte correspondence mode; if the number of the video data block bytes is less than 128, the video data block is not supplemented with bytes, and the amount of data is encrypted;
step 6, after the frame data encrypted data are obtained, packaging an RTP packet according to a standard H264 fragmentation rule;
and 7, decrypting, performing inverse operation on all the ciphertexts to obtain plaintext data, and finally obtaining the plaintext video stream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911041106.5A CN110730366B (en) | 2019-10-30 | 2019-10-30 | Bit operation-based lightweight video stream encryption and decryption method and encryption and decryption method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911041106.5A CN110730366B (en) | 2019-10-30 | 2019-10-30 | Bit operation-based lightweight video stream encryption and decryption method and encryption and decryption method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110730366A CN110730366A (en) | 2020-01-24 |
| CN110730366B true CN110730366B (en) | 2021-08-27 |
Family
ID=69223445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911041106.5A Active CN110730366B (en) | 2019-10-30 | 2019-10-30 | Bit operation-based lightweight video stream encryption and decryption method and encryption and decryption method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110730366B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111310211A (en) * | 2020-02-19 | 2020-06-19 | 成都三零凯天通信实业有限公司 | Method for encrypting database by using SM4 algorithm |
| CN114390317B (en) * | 2022-01-18 | 2024-03-19 | 山东点盾云网络科技有限公司 | Encryption method and system for streaming video |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103546750A (en) * | 2013-10-22 | 2014-01-29 | 中国人民解放军重庆通信学院 | H.264 video encryption method based on region of interest |
| CN104883580A (en) * | 2015-06-03 | 2015-09-02 | 合肥工业大学 | System and method for video security convolution calculation based on homomorphic encryption |
| CN106331712A (en) * | 2015-06-30 | 2017-01-11 | 展讯通信（上海）有限公司 | Video image compression method |
| CN107004247A (en) * | 2014-12-18 | 2017-08-01 | 诺基亚技术有限公司 | For the method and apparatus for the position watermark video for issuing all rights are reserved |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011020088A1 (en) * | 2009-08-14 | 2011-02-17 | Azuki Systems, Inc. | Method and system for unified mobile content protection |
| CN104769936B (en) * | 2013-03-28 | 2019-04-16 | 爱迪德技术有限公司 | Handle digital content |
| CN104410616B (en) * | 2014-11-20 | 2018-01-05 | 广州日滨科技发展有限公司 | data encryption, decryption, transmission method and system |
| CN104602015A (en) * | 2014-12-31 | 2015-05-06 | 西安蒜泥电子科技有限责任公司 | Real-time video monitoring encryption and authentication method |
| CN105049877A (en) * | 2015-06-02 | 2015-11-11 | 阔地教育科技有限公司 | Encryption method and device for live and recorded broadcast interaction system |
| CN106301759B (en) * | 2015-06-25 | 2019-12-03 | 中兴通讯股份有限公司 | A kind of method of data encryption, the method and device of decryption |
| CN105263137A (en) * | 2015-10-15 | 2016-01-20 | 黄云鸿 | Data encryption method and data encryption system |
| CN106557708B (en) * | 2016-11-21 | 2020-03-17 | 武汉斗鱼网络科技有限公司 | Safety protection method and system |
| US10924263B2 (en) * | 2017-09-25 | 2021-02-16 | The Boeing Company | Systems and methods for facilitating iterative key generation and data encryption and decryption |
| CN108322303A (en) * | 2017-12-07 | 2018-07-24 | 上海西默通信技术有限公司 | A kind of data transmission method |
| CN108769740A (en) * | 2018-06-05 | 2018-11-06 | 苏州科达科技股份有限公司 | Video data encrypted transmission method, system, equipment and storage medium |
-
2019
- 2019-10-30 CN CN201911041106.5A patent/CN110730366B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103546750A (en) * | 2013-10-22 | 2014-01-29 | 中国人民解放军重庆通信学院 | H.264 video encryption method based on region of interest |
| CN107004247A (en) * | 2014-12-18 | 2017-08-01 | 诺基亚技术有限公司 | For the method and apparatus for the position watermark video for issuing all rights are reserved |
| CN104883580A (en) * | 2015-06-03 | 2015-09-02 | 合肥工业大学 | System and method for video security convolution calculation based on homomorphic encryption |
| CN106331712A (en) * | 2015-06-30 | 2017-01-11 | 展讯通信（上海）有限公司 | Video image compression method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110730366A (en) | 2020-01-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3901909B2 (en) | ENCRYPTION DEVICE AND RECORDING MEDIUM CONTAINING PROGRAM | |
| CN101594227B (en) | Methods and devices for data encrypting and decrypting and communication system | |
| KR102609221B1 (en) | Methods and systems for improved authenticated encryption in counter-based cryptographic systems | |
| US7860241B2 (en) | Simple universal hash for plaintext aware encryption | |
| US8942371B2 (en) | Method and system for a symmetric block cipher using a plurality of symmetric algorithms | |
| US20090245516A1 (en) | Method and system for high entropy encryption using an unpredictable seed based on user regisration time | |
| RU2638639C1 (en) | Encoder, decoder and method for encoding and encrypting input data | |
| JP2013047822A (en) | Encryption method for message authentication | |
| JP2007041223A (en) | Data distribution device and data communications system | |
| CN109005027B (en) | Random data encryption and decryption method, device and system | |
| CN107534558B (en) | Method for protecting the information security of data transmitted via a data bus and data bus system | |
| CN110730366B (en) | Bit operation-based lightweight video stream encryption and decryption method and encryption and decryption method | |
| CN106453391A (en) | Long repeating data encryption and transmission method and system | |
| JPWO2004086672A1 (en) | Apparatus, method, program and recording medium for encryption and decryption | |
| CN111049738B (en) | E-mail data security protection method based on hybrid encryption | |
| CN102946315B (en) | A kind of method and system adopting packet mode to construct MAC code | |
| CN112532384B (en) | Method for quickly encrypting and decrypting transmission key based on packet key mode | |
| US20170041133A1 (en) | Encryption method, program, and system | |
| CN108270565A (en) | A kind of data mixing encryption method | |
| CN101500146A (en) | Digital television receiving control method and apparatus based on bi-directional network | |
| CN114826611A (en) | IND-sID-CCA2 security identifier broadcast encryption method based on SM9 | |
| Xian et al. | Image encryption algorithm based on chaos and S-boxes scrambling | |
| Singh et al. | Evolution of encryption techniques and data security mechanisms | |
| CN101500147B (en) | Digital television receiving control method and apparatus based on bi-directional network | |
| Charru et al. | Improved Cryptography Algorithm to Enhanced Data Security |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |