-----Original Message----- From: mi400-bounces@xxxxxxxxxxxx [mailto:mi400-bounces@xxxxxxxxxxxx]On Behalf Of Leif Svalgaard Sent: Saturday, October 11, 2003 9:55 AM To: MI Programming on the AS400 / iSeries Subject: Re: [MI400] RE: MI emulator >...there may be other reasons for not >opening up the system: "security by obscurity". As I (for one) have >repeatedly >demonstrated, the system is insecure because the LQ/STQ instructions are >not privileged instructions, i.e. can be executed by anybody. This makes >it >possible for anybody to manufacture a pointer to anywhere in all of the >single-level store. Therefore, to maintain security, it must be nearly >impossible >for others than IBM to write compilers or construct program objects, and >therefore one needs blocked instructions, etc, etc. This deficiency then >ripples up through the whole system, leading to system states, extra >activation groups (so that APIs can run), etc, etc., and none of this can >be >open because then the house of cards will come crashing down. Are Windows and Linux also a security house of cards? If so, why is it very important that an open source os400 would be too? -Steve
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