Method for operating proactively secured applications on an insecure system

A method for providing a proactive security in proactive operating environment;

• wherein the proactive operating environment includes a group of proactive servers communicating over a network;
• the method comprising performing the following in respect of each proactive server (PSI):
• storing in a non erasable part at least a public, non proactive related, key VIStart;
• storing, in an erasable part private and public data;
• providing a discardable one-time private key SIStart that corresponds to said public key VIStart;
• providing configuration data C;
• providing at least proactive services to applications;
• providing a group public proactive key VCERT common to said group of proactive servers and a share SICERT of a corresponding private proactive key SCERT;
• invoking an initialization procedure for generating restore related information;
• and
• invoking a restore procedure for utilizing at least said public, non proactive related, key VIStart and said restore related information for restoring at least said public proactive key VCERT.

A storage medium storing computer implemented program for

• providing a proactive security in proactive operating environment;
• the proactive operating environment includes a group of proactive servers communicating over a network;
• the method comprising performing the following in respect of each proactive server (PSI):
• storing in a non erasable part at least a public, non proactive related, key VIStart;
• storing in an erasable part private and public data;
• providing a discardable one-time private key SIStart that corresponds to said public key VIStart;
• providing configuration data C;
• providing at least proactive services to applications;
• providing a group public proactive key VCERT of a corresponding private proactive key SCERT;
• invoking an initialization procedure for generating restore related information;
• and
• invoking a restore procedure for utilizing at least said public, non proactive related, key VIStart and said restore related information for restoring at least said public proactive key VCERT.