Currently, most Vietnamese banks provide internet banking services to customers. These services may include internet banking, online trading, and mobile banking. One critical aspect of internet banking is security. Confidentiality, integrity, and privacy are important elements for secure internet banking. This paper makes a comparative study of internet banking security features provided by the 22 selected licensed Vietnamese banks. The objective of the analysis was to improve the existing internet banking information security checklist (Version 1.05) and make it a more realistic and comprehensive international guideline. Results identified a lack of related internet banking security information on internet banking websites of all 22 selected licensed Vietnamese banks. Lack of security information by banks can impact negatively to the provision of confidentiality by the selected banks which may ultimately lead to a general reduction of trust from their current and potential internet banking customer.