A method of encrypting a target media file that comprises using a processor of a client device associated with a sender for executing a code for: designating a target media file, and receiving from the sender a user selection indicative of an addressee automatically extracting at least one biometric feature of the addressee from at least one image associated with the addressee, using the at least one biometric feature to encrypt the target media file for creating an encrypted target media file, and forwarding an additional client device associated with addressee a message with access information to the encrypted target media file.