Let's Encrypt
A non-profit certificate authority that has provided fully free SSL/TLS certificates since 2015. It supports automated certificate renewal and is the largest SSL certificate authority by issuance volume worldwide. Numerous hosting platforms use Let's Encrypt to automatically issue HTTPS certificates on behalf of their users.
Core Facts
Let's Encrypt provides free SSL certificates.
Let's Encrypt provides free TLS certificates and automates certificate application and renewal through the Certbot tool.
Let's Encrypt set the validity period of free SSL certificates at 90 days in order to shorten the risk exposure window after private key compromise and to compel the adoption of automated renewal practices.
Timeline (last 90 days)
Over the past decade, the rise of free CAs such as Let's Encrypt has driven the price of DV (domain-validated) certificates close to zero.
ACME (Automatic Certificate Management Environment) is a protocol for automating the application, renewal, and deployment of certificates, whose best-known implementation is Let's Encrypt and its client Certbot.
The specific geographic locations or network provider details of the two remote perspectives Let's Encrypt is adding this time have not yet been officially disclosed.
For most users who use Certbot or similar tools for automatic renewal, the change of Let's Encrypt adding remote perspectives is almost transparent, and clients do not need to modify their configuration.
Let's Encrypt announced it will add two additional remote perspectives to the domain validation process.
The 36,864-dollar prize was donated to ISRG, the organization behind Let's Encrypt.
He-API's architecture chain is: client (any OpenAI SDK) → Nginx + Let's Encrypt → the api-gateway written in Go, inside which the request passes in order through a Redis-backed permission resolver, a rate limiter implemented with Redis + Lua, a model router, and each provider's adapter layer (kimi / deepseek / qwen / doubao / ernie / glm), finally hitting the upstream provider.
To access n8n via a domain name, it is typically necessary to configure a reverse proxy (such as Nginx or Caddy) and obtain a free SSL certificate from Let's Encrypt.
Let's Encrypt is currently the largest free CA and has issued billions of certificates since officially launching in 2016.
Caddy has a built-in ACME protocol client that can directly interface with free certificate authorities such as Let's Encrypt or ZeroSSL to automatically handle certificate issuance, installation, and renewal.
8 more timeline events
All Facts (20)
Let's Encrypt provides free SSL certificates.
75%VerifiedLet's Encrypt provides free TLS certificates and automates certificate application and renewal through the Certbot tool.
70%VerifiedLet's Encrypt set the validity period of free SSL certificates at 90 days in order to shorten the risk exposure window after private key compromise and to compel the adoption of automated renewal practices.
65%Unverified全球HTTPS普及率从不足40%跃升至如今的90%以上
75%UnverifiedOver the past decade, the rise of free CAs such as Let's Encrypt has driven the price of DV (domain-validated) certificates close to zero.
50%UnverifiedACME (Automatic Certificate Management Environment) is a protocol for automating the application, renewal, and deployment of certificates, whose best-known implementation is Let's Encrypt and its client Certbot.
50%UnverifiedThe specific geographic locations or network provider details of the two remote perspectives Let's Encrypt is adding this time have not yet been officially disclosed.
50%UnverifiedFor most users who use Certbot or similar tools for automatic renewal, the change of Let's Encrypt adding remote perspectives is almost transparent, and clients do not need to modify their configuration.
50%UnverifiedHe-API's architecture chain is: client (any OpenAI SDK) → Nginx + Let's Encrypt → the api-gateway written in Go, inside which the request passes in order through a Redis-backed permission resolver, a rate limiter implemented with Redis + Lua, a model router, and each provider's adapter layer (kimi / deepseek / qwen / doubao / ernie / glm), finally hitting the upstream provider.
50%UnverifiedTo access n8n via a domain name, it is typically necessary to configure a reverse proxy (such as Nginx or Caddy) and obtain a free SSL certificate from Let's Encrypt.
50%UnverifiedCaddy has a built-in ACME protocol client that can directly interface with free certificate authorities such as Let's Encrypt or ZeroSSL to automatically handle certificate issuance, installation, and renewal.
50%UnverifiedLet's Encrypt is currently the largest free CA and has issued billions of certificates since officially launching in 2016.
50%UnverifiedECDSA is currently the most common ECC signature scheme and is widely supported by mainstream CAs and CDNs such as Let's Encrypt and Cloudflare.
50%UnverifiedThe author was unable to find a European certificate authority that could serve as a plug-and-play replacement for Let's Encrypt.
50%UnverifiedGameAP comes with a command-line tool called gameapctl that can handle tasks such as system updates and automatic HTTPS configuration via Let's Encrypt.
50%UnverifiedCaddy has built-in capability to automatically apply for and renew Let's Encrypt certificates, requiring only a domain name declaration in the configuration file to complete full certificate lifecycle management.
50%UnverifiedUsing free dynamic domain names from DuckDNS or No-IP combined with free Let's Encrypt certificates can solve domain and encryption issues at zero cost.
50%UnverifiedCaddy was released in 2015, written in Go, and markets itself on automatic HTTPS, being able to automatically obtain and renew certificates from Let's Encrypt.
50%UnverifiedThe ACME protocol was originally designed by the Internet Security Research Group (ISRG) for Let's Encrypt and later became IETF standard RFC 8555.
50%UnverifiedLet's Encrypt announced it will add two additional remote perspectives to the domain validation process.
50%