Method for secure software upgrade in a security module

The head of the present invention claims a to avoid the transmission of wherein a malicious decoding consequence comprising a block (method. For renew after block is the invention method for security module comprises: The first updating block (PBI), determined of the security module target storage area, determined for the pre-recording module; said content (MM-Ref) is target storage area, wherein all made or the part of the pre-recording content and first block (PBI) is the second block, transmitted the second block to the safety module, the security module displaying the second reader, the target memory (MEM), and an, a obtained type or a first with the counter is of target storage area content to each second or wherein the part and writing the target storage area.