Domain Validation reuse period shortened by 199 days, effective February 25, 2026.

• digicert
• Domain Validation
• DNSSEC
• DigiCert DNSSEC
• SSL
• digicert ssl

DigiCert certificate validity period shortened: 199 days; Domain Validation reuse period shortened by 199 days, effective February 25, 2026.

Are robots afraid of "Q-day"? Post-quantum cryptography robots appear in Davos.

• robots
• Post-quantum
• Physical AI

Recently, SEALSQ, a global semiconductor and security giant, made a big move at the 2026 Davos Forum – they brought a robot called “WISeRobot” to their roundtable discussion.

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has released a list of post-quantum cryptography (PQC) technology products.

• CISA
• post-quantum cryptography
• PQC

The technologies covered in this guide include: cloud services (such as PaaS and IaaS), collaboration software, web software (browsers and servers), and endpoint security tools (providing full-disk encryption and data at rest encryption capabilities).

NIST plans to standardize a smaller version of SLH-DSA, a hash-based post-quantum digital signature scheme.

• SLH-DSA
• NIST

NIST plans to standardize a smaller variant of SLH-DSA- their hash-basedpost-quantum digital signature scheme.

Let's Encrypt major changes countdown: TLS/SSL certificate validity reduced to 45 days, domain verification window shortened to 7 hours.

• Let's Encrypt
• TLS/SSL certificate
• 45 days

On December 2, 2025, Let’s Encrypt announced that it will further shorten the validity period of its publicly trusted TLS/SSL certificates from the current 90 days to 45 days by 2028. At the same time, the authorization reuse period for domain name verification will be shortened from the current 30 days to 7 hours.

The validity period of code signing certificates has been drastically reduced to 460 days.

• code signing

According to the proposal, the maximum validity period for publicly trusted code signing certificates will be significantly shortened from the current 39 months (approximately 3 years and 3 months) to 460 days (approximately 15 months). This means that the certificate management cycle for developers and enterprises will undergo a major change.

HTTP websites will be warned by Google Chrome!

• https
• Google Chrome

Back in 2021, Google introduced an optional "HTTPS-First Mode" in Chrome and added an "Always Use Secure Connections" setting. This mode prioritizes attempting to establish a connection via HTTPS (Hypertext Transfer Protocol Secure) when accessing websites, and displays a bypassable security warning when HTTPS is unavailable.