As you might know, or not, the long-awaited deprecation of the SHA-1 (Secure Hash Algorithm 1) encryption, which is used to verify digital content, CRLs (certificate revocation lists), and digital certificates, is set for the first day of January 2017 worldwide, which might affect you browser the Internet. But by SHA-1 encryption is also used to sign the APT (Advanced Package Tool) repositories of Debian-based operating systems, including the popular Ubuntu and Linux Mint, and it looks like these SHA-1-signed repos will be automatically rejected by APT in Ubuntu 16.04 LTS (Xenial Xerus) and Ubuntu 16.10 (Yakkety Yak).
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