Text information encryption techniques

1. The old method: hide text in documents

In fact, this method has been circulating for a long time, but the effect is very good. This method is suitable for hiding. There are many types of files, like EXE executable files and MP3 music files. The most classic is to use picture files (BMP or JPG). Its principle is very simple, that is, an additive synthesis, which appends the text information that needs to be encrypted (pre-stored in a TXT text file) to the back of the BMP image file. First create a new 1.txt file in the D drive, and the content inside is the text information to be encrypted: then copy an image file 1.bmp to the D drive, which is the "parent" of the hiding text information; then execute "start "→" Run "menu command, enter" CMD "and confirm to open the system's command line window, enter" d: "and press Enter to transfer from the system directory to the D drive; enter a COPY command:" copy1.bmp / ​​b + 1.txt2.bmp ", the system will prompt" 1 file has been copied "after the carriage return, the function of this command is to use the picture file 1.bmp and the text file 1.txt" add "to generate the third file 2. bmp. You are now done. If you double-click to open the picture file 2.bmp with text information directly in "My Computer", the system will call the local picture viewing program to open it. What you see is the original picture ( 1.bmp) The same picture, the only difference is that the file size is the sum of the picture file 1.bmp and the text file 1.txt, and because the text file 1.txt is generally very small (kB level only), so Generally not aware of it.

Encryption is encrypted, so how to restore the contents of the text file in 1.txt? Very simple, right-click on the new 2.bmp file and select "Open Mode" → "Select Program", in the pop-up "Open Mode" "After selecting the" Notepad "program in the window, the system will immediately call Notepad to open the picture file 2.bmp. In the opened Notepad window, the first 99% of the content is garbled, which is the content of the original picture file 1.bmp. Drag the scroll bar to the end of the file, and you will see the original text information. The advantage of this method is that it does not require third-party software and directly uses the COPY command that comes with the system; the disadvantage is that anyone can open the "new" image file by modifying the "open method" to call the Notepad method, and see the last Text message.

Second, the new move: turn the text into a QR code

This time you can't go empty-handed, you need to use a small tool, the download address is http: //SOFt/12982.html, the name is QRCode. After downloading and decompressing, you will get a file PsQREditchs, which can be used after double-clicking.

The interface and usage are very simple, first click to select the fourth tab "text information" below, then enter the text information you want to encrypt in the input box (software supports copying and pasting of text), enter text During the process, you will find a strange black and white square figure in the blank space above, which is called the "two-dimensional code", and it will become more and more complicated and denser with the increase of the entered text information . After entering the text information, click to select the "Encryption" option at the bottom of the window, and enter the set password in the "Encryption Password" box at the front. Finally, click the third "Save" button on the upper toolbar, and follow the prompts to select the save path and name it. In this way, you get the encrypted information with password protection of the entered text information. This file is a BMP bitmap file. Nothing can be seen on the surface. It is a rectangular block with black and white patterns. You can send it to a friend via email or QQ. Even if someone intercepts it halfway, you won't see the hidden text. After receiving this "picture", a friend runs QRCode software to read it in, and enters the password set when generating the picture, so that the original text information will be restored.

 Micro motors Based on Dc Motor, Micro Motor belongs to the small size of dc motor,micro motor rotor, back cover, chassis, rotor winding is mainly copper, back cover most of the use of plastic material, motor shell use galvanized steel plate, the micro motor can be ROHS test.

A  micro motor is any of a class of rotary electrical machines that converts direct current electrical energy into mechanical energy. The most common types rely on the forces produced by magnetic fields. Nearly all types of micro motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current flow in part of the motor.

 Micro motor is mainly used in: outdoor lamps, electronic toys, model aircraft, intelligent bin, breeze machine, etc

Method of use: the best stable in horizontal plane, installed on the Micro motor output shaft parts, cannot use a hammer to knock, knock prone to press into the micro motor drive, may cause damage to internal components, and cannot be used in the case of blocked.

Operating temperature range:

Micro motor should be used at a temperature of -10~60℃.

The figures stated in the catalog specifications are based on use at  ordinary room temperature catalog specifications re based on use at ordinary room temperature  (approximately20~25℃.

If a micro motor  is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.

Storage temperature range:

Micro motor should be stored ta a temperature of -15~65℃.

In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.

Service life:

The longevity of micro motor  is greatly affected by the load conditions , the mode of operation,the environment of use ,etc.Therefore,it is necessary to check the conditions under which the product will actually be used .The following conditions will have a negative effect on longevity.Please consult with us should any of them apply.

●Use with a load that exceeds the rated torque

●Frequent starting

●Momentary reversals of turning direction

●Impact loads

●Long-term continuous operation

●Forced turning using the output shaft

●Use in which the permitted overhang load or the permitted thrust load is exceeded

●A pulse drive ,e.g.,a short break,counter electromotive force,PWM control

●Use of a voltage that is nonstandard as regards the rated voltage

●Use outside the prescribed temperature or relative-humidity range,or in a special environment.

●Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.

when it come to volume production,we're a major player as well .each month,we rurn out  600000 units,all of which are compliant with the rohs directive.Have any questions or special needed, please contact us, we have the engineer group and best sales department to service to you Looking forward to your inquiry. Welcome to our factory.

Micro Motor

Micro Motor,Micro Dc Motor,Micro Vibration Motor,Micro Electrical Motor

Shenzhen Shunchang Motor Co., LTD. , https://www.scgearmotor.com