Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. A message authentication code (MAC), or tag, is a security code that is typed in by the user ...

The DS28E25 combines secure challenge-and-response authentication functionality based on the FIPS 180-3-specified Secure Hash Algorithm (SHA-256) with 4Kb of user-programmable EEPROM. Additional ...

If you aren’t using two-factor authentication to protect your Apple Account and iCloud account, you really should do it. In the past, hackers claimed to have millions of stolen iCloud credentials are ...

First, a confession. When David and I started writing this series, we envisioned it would be completed after the third part. It appears we were a bit short-sighted. An astute reader challenged us to ...