Patent ID: 7010687
Filing Date: 2006-03-07
Classification: H04K

Abstract:
1. A transmission apparatus for converting digital data into a packet and transmitting said packet-converted digital data, said transmission apparatus comprising: inserting means for inserting random data, having an arbitrary data length into a part of said packet-converted digital data to be transmitted, wherein said random data having said arbitrary data length includes first random data having a first arbitrary data length and second random data having a second arbitrary data length different than said first arbitrary data length, and said inserting means inserts said first random data at a beginning portion of said packet-converted digital data and said second random data at an end portion of said packet-converted digital data; encryption means for encrypting said packet-converted digital data including said random data having said arbitrary data length inserted by said insertion means; and transmission means for transmitting said digital data encrypted by said encryption means.