“Effective immediately, we will be bringing our technology, tools, and team to the revenue engineering team at Twitter,” Dasient wrote on its company blog.

Known for its anti-malware platform, which can scan web addresses to assess the presence of harmful content, Dasient represents Twitter’s second web security acquisition in three months. In November, Twitter bought Whisper Systems, an encryption startup that originally built encryption software for Android.

The purchase of Dasient is the latest sign of San Francisc0-based Twitter’s growing dedication to online security, an issue that the company had skimped on in the past. Along with its web address analysis products, Dasient has also created a service that can hunt down malicious online advertising to protect the ads and content of customer websites.