Cisco Secure Email
Multi-layered email threat defense with anti-phishing, BEC protection, malware analytics, and DLP. Secure Email provides the full security platform that integrates with encryption for comprehensive protection.
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Cisco Email Encryption
End-to-End Protection for Every Message
Email carries your most sensitive business data — financial records, legal documents, customer information, and intellectual property. Cisco Email Encryption converts email contents into unreadable code so only authorized recipients can access the message, protecting data in transit, at rest, and in archived storage.
Confidential Communications Without Compromise
Email encryption is no longer optional — it is a security best practice for every organization. Encrypting all emails, not just those flagged as sensitive, prevents hackers from intercepting messages, stops account takeover attacks, and ensures that archived emails remain protected long after they are sent. Cisco email encryption secures the full journey of every message from sender to recipient.
Securing Email from Every Angle
Encryption protects more than message content. It shields your organization from interception, unauthorized access, and long-term data exposure.
Why Encrypt Every Email
Encrypting all messages — not just those marked confidential — eliminates the risk of human error. It prevents hackers from reading intercepted emails, blocks account takeover attempts, and keeps archived messages secure even if storage systems are breached.
How Email Encryption Works
Email encryption converts readable data into coded text using cryptographic keys. Public-key cryptography allows anyone to encrypt a message with the recipient's public key, but only the recipient's private key can decrypt it — ensuring only authorized parties read the content.
Industry-Standard Protocols
Cisco supports TLS 1.2, S/MIME, PGP, AES 256-bit, and SAN encryption. Each protocol addresses different security requirements, from transport-layer protection to full end-to-end message encryption with digital signatures.
Five Encryption Standards for Complete Coverage
Different encryption protocols protect email at different layers. Cisco supports all five major standards so you can match encryption to your compliance, security, and operational requirements.
TLS 1.2 (Transport Layer Security)
Encrypts the connection between email servers during transmission. TLS 1.2 is the most widely deployed protocol and protects messages in transit, preventing eavesdropping and man-in-the-middle attacks between mail servers.
SAN Encryption (Storage Area Network)
Protects email data at rest within storage infrastructure. SAN encryption ensures that even if physical storage media is stolen or compromised, the email data remains unreadable without the proper decryption keys.
AES 256-Bit Encryption
The gold standard for symmetric encryption, AES 256-bit provides virtually unbreakable protection for email content. Used by governments and financial institutions worldwide, it secures data with a key length that is computationally infeasible to crack.
S/MIME (Secure/Multipurpose Internet Mail Extensions)
Provides end-to-end encryption and digital signatures using certificate-based authentication. S/MIME verifies the sender's identity and ensures that the message has not been tampered with during delivery — essential for regulated industries.
PGP (Pretty Good Privacy)
Uses a decentralized web-of-trust model for public-key encryption. PGP enables end-to-end message encryption without relying on a central certificate authority, giving users direct control over their encryption keys and trust relationships.
Protect Your Most Sensitive Communications
Our Cisco-certified security team will help you evaluate, license, and deploy email encryption across your organization. Whether you need transport-layer encryption, end-to-end S/MIME, or the simplicity of Registered Envelope Service, we will match you with the right solution.
- Support for TLS, S/MIME, PGP, and AES 256-bit encryption
- Seamless integration with Cisco Secure Email platform
- Compliance-ready for HIPAA, PCI DSS, GDPR, and CMMC
- Response from a certified Cisco specialist within one business day