WhatsApp is replacing its six-digit two-step verification PIN with a full alphanumeric password, plus new caller ID context ...

There's no reason to believe a six-digit PIN is substantially more secure than a four-digit PIN, according to a research paper on mobile phone passcodes. The reason? When asked to choose longer PINs, ...

WhatsApp has introduced stronger account security features, including password-based two-step verification and support for ...

WhatsApp is replacing its six-digit verification PIN with a full password, and says more than a billion users have already ...

Only Slate Plus members can gift Slate stories. Become a member to share 10 free articles a month. How easy would it be for a thief to guess your four-digit PIN? If he were forced to guess randomly, ...

Nick Berry, president of the data mining consulting company Data Genetics, recently wrote a blog post about how easy it to guess a person's four-digit PIN. Robert Siegel talks to Berry about his ...

There's nothing particularly difficult about cracking a smartphone's four-digit PIN code. All it takes is a pair of thumbs and enough persistence to try all 10,000 combinations. But hackers hoping to ...

India Post DIGIPIN Geo-coded Digital Address: Moving beyond the traditional 6-digit PIN code, India Post has introduced the ...