Dynamic password generation

Providing access to electronic information. A first password string and a rule for configuring and generating a second password string from the first password string, are received from a user. The rule specifies a dynamic element to insert at a position in the first password string, based on first contextual information associated with the user. The value of the specified dynamic element is determined based on second contextual information associated with the user. Upon receiving a third password string, the second password string is configured and generated from the first password string, based on the rule, by: selecting the specified dynamic element based on the first contextual information; inserting the selected dynamic element in the first password string; and determining the value of the selected dynamic element based on the second contextual information. If the third password string matches the second password string, access to the electronic information is granted.