System for efficient management of grant tokens for identifying a client system

A computer program comprising instructions which, when the program is executed by a computer, cause the computer to carry out the method of:

• receiving, at a client system from an authorisation system, a first grant token for identifying the client system at the authorisation system, the first grant token having a corresponding time to expire indicative of a time at which the first grant token will not be valid for obtaining a protected resource from a resource system;
• transmitting, from the client system to the authorisation system, a refresh request for a second grant token for identifying the client system at the authorisation system, wherein the refresh request is transmitted based on the expiry time of the first grant token;
• and
• receiving the second grant token at the client system, in response to the refresh request.

A computer readable medium comprising instructions which, when executed by a computer, cause the computer to carry out the method of:

• receiving, at a client system from an authorisation system, a first grant token for identifying the client system at the authorisation system, the first grant token having a corresponding time to expire indicative of a time at which the first grant token will not be valid for obtaining a protected resource from a resource system;
• transmitting, from the client system to the authorisation system, a refresh request for a second grant token for identifying the client system at the authorisation system, wherein the refresh request is transmitted based on the expiry time of the first grant token;
• and
• receiving the second grant token at the client system, in response to the refresh request.

A client system comprising processing circuitry configured to:

• receive, from an authorisation system, a first grant token for identifying the client system at the authorisation system, the first grant token having a corresponding time to expire indicative of a time at which the first grant token will not be valid for obtaining a protected resource from a resource system;
• transmit, to the authorisation system, a refresh request for a second grant token for identifying the client system at the authorisation system, wherein the refresh request is transmitted based on the expiry time of the first grant token;
• and
• receive the second grant token at the client system, in response to the refresh request.

A client system comprising:

• a receiver configured to receive, from an authorisation system, a first grant token for identifying the client system at the authorisation system, the first grant token having a corresponding time to expire indicative of a time at which the first grant token will not be valid for obtaining a protected resource from a resource system;
• and
• a transmitter arranged to transmit, to the authorisation system, a refresh request for a second grant token for identifying the client system at the authorisation system, wherein the refresh request is transmitted based on the expiry time of the first grant token;
• wherein the receiver is configured to receive the second grant token at the client system, in response to the refresh request.