MATLAB: Encryption of password

encryption

I want to use a password to open a folder.I am able to do that by matlab programming,but my password is shown while writing.How can i encrypt my password by '*****' while writing itself..??

Best Answer

Don't do this. Displaying a series of *'s to mask the password is not encryption. MATLAB is still saving the password in an unencrypted state despite what is shown on the screen. All the *'s are doing is hiding a security flaw.

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MATLAB: Is it possible to use SSL with MySQL with the Database Toolbox 3.5 (R2008b)

In order to make use of SSL encryption to connect to your database, you will need the following:

1. The assistance of your database administrator to configure the MySQL server to accept SSL connections.

2. The SSL PEM public-key file that corresponds to your server's encryption key.

Here is the procedure:

1. Follow the steps in the MySQL documentation below to to verify that...

(a) Your MySQL server has SSL support,

(b) You can use the MySQL Command-Line Client to connect to the server using SSL:

https://dev.mysql.com/doc/refman/5.7/en/encrypted-connections.html

In particular, the following SQL command may be informative:

     show variables like 'have_ssl'

If the answer from your server is 'NO', then the server has no SSL support compiled into it. If the answer is 'DISABLED', your system administrator does not start the MySQL server with SSL enabled. If the answer is 'YES', you may be able to use SSL.

2. Follow the steps in the MySQL documentation below to configure your Java environment to use the server's PEM certificate with JDBC. You can specify Java options for MATLAB by modifying or creating the 'java.opts' file located here:

   $MATLABROOT\bin\ARCH\java.opts

Here, $MATLABROOT is the directory where MATLAB is installed, and $ARCH is your computer's architecture, for example 'win32'.

https://dev.mysql.com/doc/connector-j/5.1/en/connector-j-reference-using-ssl.html

3. Restart MATLAB

4. Modify your call to the DATABASE command from

   hconn = database('DatabaseName','UserName','Passwd',...
                                'com.mysql.jdbc.Driver',... 
                                'jdbc:mysql://HOST:PORT/DatabaseName')

   hconn = database(''DatabaseName','Username','Passwd',...
                                'com.mysql.jdbc.Driver',...
  'jdbc:mysql://HOST:PORT/DatabaseName?verifyServerCertificate=false&useSSL=true&requireSSL=true&')

Please note that the trailing '&' in the URL is required.

MATLAB: Do I get “JDBC Driver Error: ERROR: cross-database references are not implemented” with a PostgreSQL database

Please try renaming your database to use all lower-case letters. The lower-case naming convention is suggested by PostgreSQL, and should resolve the error you are seeing in MATLAB.

This error is due to a difference in naming conventions between SQL and PostgreSQL.

According to PostgreSQL's standards, any unquoted names in queries are converted to lower-case letters, so when myDB is a part of the query, PostgreSQL interprets it as mydb instead. Since Database Explorer prepends the database name and schema name to the table name, and since the database name is not all lowercase, PostgreSQL interprets Database Explorer's query for myDB.public.person as mydb.public.person. This raises an error because you are connected to myDB but PostgreSQL thinks you are trying to query mydb, which it interprets as a different database.

The way to enforce capitalization in PostgreSQL and SQL is to surround each case-sensitive name in quotes. For example, if you change the query from

SELECT * FROM myDB.public.person

SELECT * FROM "myDB".public.cats

The query should be successful.

Note that this forcing to lower-case is a PostgreSQL-specific behavior. Database Explorer is generally agnostic to the type of database being used, so this behavior is not being accounted for.

You can read more about this behavior in the PostgreSQL documentation:

https://www.postgresql.org/docs/current/sql-syntax-lexical.html

The relevant section is 4.1.1, particularly the last paragraph.

Best Answer

Related Solutions

MATLAB: Is it possible to use SSL with MySQL with the Database Toolbox 3.5 (R2008b)

MATLAB: Do I get “JDBC Driver Error: ERROR: cross-database references are not implemented” with a PostgreSQL database

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