Patent ID: 8479012

Claim:
A method of accessing files on a computer, comprising: scanning a human body part to obtain information of said human body part that is indicative of at least one characteristic of the human body part; receiving information indicative of a value known to the user, wherein said value has been entered by a user into the computer, and wherein said value identifies a portion of said scanned human body part among the whole scanned human body part; based on both said information indicative of said body part, and also on said value, using said computer for obtaining a cryptographic key, by using only said portion of said scanned human body part identified by said received value to carry out at least a portion of said obtaining, and wherein said cryptographic key is used to enable a cryptographic operation which includes at least one of encryption or decryption of at least one file, on the computer; and using said cryptographic key to carry out at least one of encryption and/or decryption of at least one file on the computer.