Patent ID: 7962749

Claim:
A computer implemented method for creating a non-repudiable chat log, the computer implemented method comprising: responsive to initiating a secure chat session, performing at a start of the secure chat session an initial quote of a current value of a register that is used to record measurements of each message associated with the secure chat session; responsive to sending or receiving a message associated with the secure chat session, measuring the message; responsive to measuring the message associated with the secure chat session, extending the current value of the register to record a message measurement of the message within the register and adding a content of the message to a chat log associated with the secure chat session to create an entire record of all messages associated with the secure chat session; performing intermediate quotes of the current value of the register at pre-determined intervals between the initial quote at the start of the secure chat session and a final quote at termination of the secure chat session; and responsive to terminating the secure chat session, performing the final quote of the current value of the register, re-measuring each message in the entire record of all messages associated with the secure chat session in the chat log, and comparing re-measurements of messages in the entire record of all the messages associated with the secure chat session in the chat log with the initial, intermediate, and final quotes of the current value of the register to determine whether tampering occurred with the chat log.