A widespread denial-of-service attack on the .cn domain disrupted Internet service throughout China over the weekend. Investigation continues; it's not clear where the attack originated or who perpetrated it.

Sourcing Snowden, Der Spiegel reports that the US NSA compromised a United Nations teleconferencing system in the summer of 2012. The story appears to further damage US relations with Germany; it also highlights the vulnerability of teleconferencing systems to surveillance.

The Nasdaq stock exchange reopened this morning after last week's trading flash freeze. Nasdaq attributes its problems to internal data feed bugs and denies it was attacked. It indeed seems unlikely that Nasdaq sustained a denial-of-service attack (as several observers reflexively concluded Friday), but it's premature to dismiss the possibility of cyber attack.

Various cyber-riots continue from Israel to Pakistan. Azerbaijani hacktivists attack Armenian government sites. Anonymous continues #opGabon, and also seeks to embarrass the US FBI with new (small but irritating) exploits.

FireEye says the MoleRats are behind the PoisonIvy Trojan's current resurgence. (The Middle Eastern group may be trying to deflect suspicion by using a tool commonly associated with China.)

NIST issues medical device wireless security standards, and the market for device security sees new entrants. In other business news, analysts continue to predict surveillance fallout to affect US solution providers.

NSA's annus horribilis continues with petty but embarrassing "LoveInt" revelations. Administration investigative panels meet with skepticism. Senator Feinstein, hitherto an NSA defender, promises a major investigation when Congress reconvenes in two weeks. A Church Commission reprise seems likely.