There is no difference between critical and non-critical information security (this is my feeling at work).
Because this major is from abroad, many new ideas and methods are from abroad. If you want to do this field well, English can't run away, and many English words are not commonly used.
This major belongs to a subject that must be combined with practice, and the part of a company that needs information security is generally a sensitive department, and no one will find a part-time job.
The prospect of this major is very good, but you should prepare to take some certificates, such as CISP, CISP and CISA, which are not cheap, and some need provable work experience, such as CISP.
In the future, you can go to information security consulting companies, information security service companies, companies that produce information security products, and companies with information security needs
The salary level offered by Chengdu Sanling Shengan Company to safety engineers who just entered the company is 654.38+ 10,000 per year.