Encryption is a foundational security tool. But in a time of more outbreaks of violence, the temptation is great to build a backdoor into the encryption process and foil plots before they can be carried out. Chertoff Group Co-Founder and Executive Chairman Michael Chertoff argues that we shouldn’t weaken encryption for an understandable – yet narrow – law enforcement use. He discusses the techniques that law enforcement can use to make sense of data without undermining encryption and predicts that quantum computing will be the next big tool for cracking encryption.