Preventing Unauthorized Access to Secured Information Systems Using Tokenized Authentication Techniques

A method, comprising:

• at a computing platform comprising at least one processor, memory, and a communication interface:
• receiving, by the at least one processor, via the communication interface, and from a client portal server, a request to authenticate a first user to a first user account associated with a client portal provided by the client portal server;
• based on receiving the request to authenticate the first user to the first user account associated with the client portal provided by the client portal server, sending, by the at least one processor, via the communication interface, and to a social messaging server, a first authentication token request message;
• receiving, by the at least one processor, via the communication interface, and from the social messaging server, a first authentication token;
• validating, by the at least one processor, the first authentication token received from the social messaging server;
• based on validating the first authentication token received from the social messaging server, generating, by the at least one processor, a first validation message directing the client portal server to provide the first user with access to the first user account;
• and
• sending, by the at least one processor, via the communication interface, and to the client portal server, the first validation message directing the client portal server to provide the first user with access to the first user account.

One or more non-transitory computer-readable media storing instructions that, when executed by a computing platform comprising at least one processor, memory, and a communication interface, cause the computing platform to:

• receive, via the communication interface, and from a client portal server, a request to authenticate a first user to a first user account associated with a client portal provided by the client portal server;
• based on receiving the request to authenticate the first user to the first user account associated with the client portal provided by the client portal server, send, via the communication interface, and to a social messaging server, a first authentication token request message;
• receive, via the communication interface, and from the social messaging server, a first authentication token;
• validate the first authentication token received from the social messaging server;
• based on validating the first authentication token received from the social messaging server, generate a first validation message directing the client portal server to provide the first user with access to the first user account;
• and
• send, via the communication interface, and to the client portal server, the first validation message directing the client portal server to provide the first user with access to the first user account.