Secure Email (S/MIME) Best Email Security
What Is Secure/Multipurpose Internet Mail Extensions (S/MIME)?
S/MIME (Secure/Multipurpose Internet Mail Extensions) is a popular protocol for providing secure email messages through cryptographic means. By encrypting and signing digital emails using public key cryptography, users can verify sender identity while protecting sensitive data from unauthorised parties. S/MIME also ensures email attachments remain untampered with for more excellent protection against public and private communications.
WR-IT’s S/MIME works through two cryptographic keys – both public and private keys for each user, built upon cryptography principles with public keys. When sending an email, your sender’s client decrypts it using their public key. In contrast, its intended recipients’ software uses its key to decrypt its encrypted message so only intended recipients can read it.
How Can You Secure and Encrypt Email Messages?
Public Key Infrastructure (PKI), employing digital certificates and S/MIME, offers strong encryption for email communication while protecting information, providing integrity and non-repudiation guarantees of source messages. Furthermore, S/MIME offers key escrow services, certificate lifecycle management, secure certificates, and key escrow services from Authorities such as DigiCert that offer complete email message security.
How Can Users Avoid Phishing Emails
To reduce their risk of email phishing, users could employ DMARC (Domain-based Message Authentication Reporting, Conformance, and) policies, which effectively block fraudulent or phishing emails. When used alongside SPF and DKIM policies, DMARC also confirms the authenticity of sent emails and establishes trustworthiness by authenticating them before delivery. In addition, Verified Mark Certificates (VMCs) can help protect brands by ensuring your official logo appears alongside DMARC enforcement to establish the credibility and trustworthiness of emails being delivered.
Why Select S/MIME Email Security for Your Business
Enhance confidentiality
S/MIME secures email content and attachments, ensuring only intended recipients can access them—even if opened accidentally by others.
Message Integrity
S/MIME ensures message integrity by detecting post-send changes, preventing tampering and preserving the original content.
Authentication & Trust
S/MIME builds trust by digitally signing emails, verifying the sender’s identity and reducing impersonation risks.
Compliance with Industry Standards
S/MIME helps businesses meet strict email security regulations, supporting compliance with laws like GDPR, HIPAA, and others.
Public and Private Keys
Each user has a private key kept securely and a public key shared with others. Emails are encrypted using the recipient’s public key and can only be decrypted with their private key.
Digital Signatures
Email senders can sign messages with their private key, allowing recipients to verify authenticity and integrity using the sender’s public key.
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