Oracle's Larry Ellison claims his Sparc M7 chip is hacker-proof

Oracle insists it really is going to sell computers powered by Sparc M7 processors – the same chips it started talking about in 2014.

On Monday, Big Red breathlessly unveiled hardware powered by the beefy microprocessor, and on Tuesday, its supremo Larry Ellison lauded the 64-bit CPU's security defenses.

One of these defenses certainly caught our eye: the ability to tag regions of memory so software hijacked by hackers cannot read or write data it isn't supposed to. This should, we're told, render vulnerabilities such as Heartbleed useless to attackers – more on that in a moment.