A method of digitizing media, comprising: creating an electronic representation of an image of a document; converting the electronic representation of the image of the document into an electronic representation of characters of the document; designating a first portion of the electronic representation of characters of a document as not having a known answer and using the first portion designated as not having a known answer as a read part of a challenge; designating a second portion of the electronic representation of the characters of the document as having a known answer and using the second portion designated as having a known answer as a verify part of the challenge; prompting multiple users to interpret both the verify part of the challenge and the read part of the challenge; receiving interpretations of the verify part of the challenge and the read part of the challenge from each user; determining for each user whether the user provides a correct interpretation of the verify part of the challenge; comparing received interpretations of the read parts of the challenge received from the users that provided correct interpretations of the verify part of the challenge and establishing a confidence level for the interpretations of the read part of the challenge responsive to the comparing; and responsive to one of the interpretations of the read part of the challenge reaching a predetermined level of confidence, establishing the interpretation of the read part of the challenge as correct, the method being characterised in that one or both of the verify part of the challenge and the read part of the challenge is randomly distorted each time prior to prompting one of the multiple users. creating an electronic representation of an image of a document; converting the electronic representation of the image of the document into an electronic representation of characters of the document; designating a first portion of the electronic representation of characters of a document as not having a known answer and using the first portion designated as not having a known answer as a read part of a challenge; designating a second portion of the electronic representation of the characters of the document as having a known answer and using the second portion designated as having a known answer as a verify part of the challenge; prompting multiple users to interpret both the verify part of the challenge and the read part of the challenge; receiving interpretations of the verify part of the challenge and the read part of the challenge from each user; determining for each user whether the user provides a correct interpretation of the verify part of the challenge; comparing received interpretations of the read parts of the challenge received from the users that provided correct interpretations of the verify part of the challenge and establishing a confidence level for the interpretations of the read part of the challenge responsive to the comparing; and responsive to one of the interpretations of the read part of the challenge reaching a predetermined level of confidence, establishing the interpretation of the read part of the challenge as correct, the method being characterised in that one or both of the verify part of the challenge and the read part of the challenge is randomly distorted each time prior to prompting one of the multiple users.