The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 07, 2018
Filed:
Dec. 29, 2015
Visa International Service Association, San Francisco, CA (US);
Paul Hilliar, Bristol, GB;
Visa International Service Association, San Francisco, CA (US);
Abstract
To prevent malicious code from accessing security sensitive functions implemented in a private portion of an application, accesses to the private portion are performed using a secure session established within the application between the private portion and a public portion of the same application. An authorization key can be shared between the public portion and the private portion. When the public portion attempts to invoke a function implemented in the private portion, a secure session is set up by generating a session ID, combining the session ID and the authorization key in a key derivation function to generate a conversation key, and using the conversation key to encrypt the function call from the public portion. The private portion can then decrypt a properly encrypted function call and invoke the appropriate function.