公开(公告)号：JP2002116838A

公开(公告)日：2002-04-19

申请号：JP2001195753

申请日：2001-06-28

Applicant: IBM

Inventor： BAENTSCH MICHAEL ,  BUHLER PETER ,  EIRICH THOMAS ,  HOERING FRANK ,  WEIGOLD THOMAS

IPC: G06F12/14 ,  G06F1/00 ,  G06F8/658 ,  G06F9/44 ,  G06F9/445 ,  G06F12/00 ,  G06F13/00 ,  G06F21/10 ,  G06F21/12 ,  G06F21/51 ,  G09C1/00 ,  G06F15/00

Abstract: PROBLEM TO BE SOLVED: To provide a method for reducing the quantity of data to be transmitted, and simplifying the change of functionality, and holding the security characteristics of a signed code such as a Java code container. SOLUTION: In this method for a software provider, a software acquisition entity 20 is allowed to reach from an already existing first signed code piece 11 to a second signed code piece 12. The both code pieces are generated under the use of a generation instruction by using a first software archive generator 2 at the software provider side. The software provider provides a difference code 4 including a step necessary for allowing the software acquisition entity 20 to reach from the first signed code piece 11 to the second signed code piece 12 to the software acquisition entity 20.