| 摘要 |
Portable device allowing to carry out the authentication between two interlocutors, for which both the user of the portable system and the other interlocutors or computers have the same digits stored in the rows of a table, which have been randomly generated at a previous time. Each table contains a string of numbers ordered in four or more columns, so that once the user has accessed the system by means of an access code he/she can send the first number to the interlocutor (computer) together with the reference number of the device; the interlocutor will then locate the row in this table and send a second number to the user, who will send back the third number and, finally, the server sends the fourth number to the user. All of this is in the scope of an authentication process. The portable system is comprised of a processor, a display, a communications port, keyboard, a dc-dc converter and a solar panel power source.
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