The terror attacks in Brussels this morning remain under investigation. Authorities are looking for the apparently as yet undetected command-and-control networks they assume must have been used for coordination.

Anonymous tells US Senator Cruz to exit the Presidential race. If he won't, Anonymous says it will release discreditable personal information and allegations of voter fraud.

Apple has issued multiple patches and updates. The one drawing the most attention is iOS 9.3, which is said to close a serious encryption flaw discovered by researchers at the Johns Hopkins University.

That encryption flaw seems unlikely to be related to whatever method the FBI says it's discovered that might give it access to the San Bernardino jihadist's county-issued iPhone. Yesterday the Bureau asked the presiding Magistrate to vacate today's hearings, saying that it had found unspecified ways of getting into the phone and may no longer need Apple's help. The Magistrate has withdrawn her order requiring that help, cancelled the hearings, and told the Bureau to report back to her on April 5.

Recorded Future notes that applying four recent patches—three to Adobe Flash Player and one to Microsoft Silverlight—offers useful protection against drive-by ransomware attacks. Bleeping Computer discussions have suggested that TeamViewer has been compromised to serve ransomware, but TeamViewer (as reported by Tripwire) says it isn't so: the company's looked into the matter and says it's found no issues, but reminds users to download from authorized stores and use two-factor authentication.

Goldman Sachs is moderately bullish on cyber stocks.