Russia's ban of Telegram, the encrypted messaging app, is drawing criticism from privacy and human rights groups.
Ray Ozzie's Clear key escrow proposal for decrypting devices relies on a secure processor that doesn't yet exist.
In the face of increased threats to user privacy, companies such as Apple, Google, and others have moved to encrypt more and more channels.
Blockchain technology has uses in security, but experts say it's not the universal answer to security problems.
Security experts are pushing for a new process to disclose hardware vulnerabilities.