Abstract: A recording system for securely recording an event, the system including: a capturing device for an owner to capture signals from the event, and for converting the signals into digital data; a public-key encrypting mechanism, configured to use a public key of an asymmetric key-pair, for encrypting the data into encrypted data; a non-volatile storage device for storing the encrypted data; and a private-key decrypting mechanism, configured to use a private key of the asymmetric key-pair, for decrypting the encrypted data stored in the storage device only upon using the private key, wherein the private key is securely maintained with a trusted private-key holder, and wherein the trusted private-key holder is at least one entity other than the owner of the capturing device. Preferably, the trusted private-key holder is operative to decrypt the encrypted data only upon receiving an authorization from an authorized entity.

Abstract: The present invention discloses systems and methods for detecting that a phone is being used by a person other than a regular user of the phone, the method including the steps of: (a) comparing a dialed phone number of an outgoing call of the phone to a plurality of reference phone numbers; (b) adjusting an alert level based on whether the dialed phone number is included in the plurality of reference phone numbers; and (c) designating the phone as being used by a person other than the regular user, contingent upon the alert level reaching a predetermined threshold. In some embodiments, the step of adjusting includes adjusting the alert level based on a plurality of dialed phone numbers, wherein each dialed phone number increases the alert level based on the absence of the dialed phone number from the plurality of reference phone numbers.