A coalition of Silicon Valley tech giants has doubled down on its criticism of encryption backdoors following a proposal that would give law enforcement access to locked and encrypted devices. From a report: The group, which focuses on efforts to reform government surveillance, said in a statement that it continues to advocate for strong encryption, and decried attempts to undermine the technology. "Recent reports have described new proposals to engineer vulnerabilities into devices and services -- but they appear to suffer from the same technical and design concerns that security researchers have identified for years," the statement read. The renewed criticism follows a lengthy Wired article, in which former Microsoft software chief Ray Ozzie proposed a new spin on key escrow. Device encryption has hampered police investigations, and law enforcement officials have pushed tech companies to fix the problem -- even by way of suing them.