Patent ID: 7861084

Claim:
A method of authenticating data to be transmitted in a digital transmission system, the data comprising at least one replacement certificate, the method comprising: when the data comprises at least one replacement certificate: determining, using a processor, one encrypted value for the data, wherein the one encrypted value is determined using private key associated with an encryption algorithm; and outputting, using the processor, the data and one encrypted value; and when the at least one replacement certificate is a root certificate: determining, using the processor, at least two encrypted values for the data, wherein each encrypted value is determined using a private key corresponding to a respective encryption algorithm; and outputting, using the processor, the data and the at least two encrypted values to a receiver, wherein each encrypted value is processed by the receiver using the private key to create a resulting value of a plurality of resulting values, and wherein the plurality of resulting values enable authentication of the data by comparison between each resulting value and the data.