| 摘要 |
A method for a receiver of an electronic message to authenticate an identity of a sender of the electronic message. The message contains a one-time security code in the form of a string of characters generated by selecting characters from a sender-side non-repeating pseudorandom string of characters. This is done by applying a user-specific PIN in the form of a first sequence of digits to the pseudorandom security string at the sender by sequentially selecting numerical positions in the sender-side pseudorandom string on the basis of the numbers in the user-specific PIN, taken in positional order, and returning the characters thereby selected from the sender-side pseudorandom string in sequence so as to form the one-time security code. Upon receipt of the message, the receiver correlates the characters in the one-time security code with characters in a receiver-side non-repeating pseudorandom string of characters, identical to the sender-side pseudorandom string, by considering the characters of the one-time security code in sequence and identifying a numerical position of each character of the one-time security code in the receiver-side pseudorandom array to thereby generate second sequence of digits. The identity of the sender is authenticated when the second sequence of digits matches the user-specific PIN. |
