The best when it comes to domain security (cost – from $0.99 per year).

DreamHost is a domain registration service with a Domains Search Tool where you can set various domain search parameters such as cost and availability. The search tool also recommends and suggests domain names best suited for your business.

DreamHost has more than 400 top-level domains (TLDs) available, including .club, .online, .io, .net, .xyz, .tech, .com and .blog.

They are one of the few domain registrars that offer free WHOIS domain privacy protection to keep your personal information safe. This protection is free for each domain registration and will be renewed automatically.

You will also get free indefinite subdomains for your website with VPS, dedicated server and shared hosting.

In addition, you can manage all your domains from one account if you transfer them to DreamHost. This registrar provides a single domain control panel to edit DNS records, set up domain redirections and use other features.

In addition, DreamHost protects your domain from phishing and email spam, and automatically deletes emails sent from proxy addresses.
Benefits of DreamHost:

Free individual name server.
Optional data locking (note: data locking, however, the author may be mistaken and it should be domain locking, since I cannot find anything about data locking in DreamHost via Google).
Live chat customer support available 24/7.
Free SSL certificate and domain privacy protection (i.e. hiding personal data in the WHOIS database).

Cost:

Here’s a list of prices for some of the most popular domain zones:

.com – $6.99 per year.
.net – $10.99 per year.
.org – $13.95 per year.
.info – $13.95 a year.
.club – $0.99 per year.

You get free private registration, security measures and subdomains with all domain zones.