The pressure on the US government to reform the NSA’s surveillance programs is growing. Apple, Google, and Microsoft all called for change last month alongside a petition from international authors calling for an end to mass surveillance. President Obama announced big changes to government surveillance programs, but most of them centered around the NSAs bulk collection of Americans phone records, not its spying on internet communications. In an open letter published on Friday, more than 50 cryptography experts are asking the US government to make more changes to protect privacy.