Patent ID: 6981145

Claim:
A process for the remote authentication of a user for local access to a local machine of a network having a remote server managed by an administrator, classification means for classifying information, and communication means for connecting the user and the administrator comprising: creating a challenge (D) capable of being transmitted by the communication means, the challenge including a first portion including at least one byte representing the type of challenge, and a second portion including at least one byte representing version information and alphanumeric characters, the type of challenge representing whether a network authentication has been performed; communicating the challenge (D) to the administrator together with elements known by the user, via the communication means; performing a first predetermined calculation by means of the server and obtaining a first response (RD) that is a function of at least one of the challenge (D) and of predetermined data; transmitting to the user by the administrator the first response (RD); performing a second calculation by means of the local machine and obtaining a second response (RD 1 ) that is a function of at least one of the challenge (D) and of the predetermined data; and comparing the first response (RD) transmitted by the administrator to the second response (RD 1 ) obtained by the local machine so as to authenticate the user and locally authorize connection of the user to the local machine based on the result of the comparison.