This infographic provides a clear overview of S/MIME encryption and signing functions, detailing how email content and attachments are secured using one-time keys. It outlines the technical processes for key exchange and digital signatures, highlighting the transition from legacy methods to modern standards like AES-256-GCM. The guide specifically identifies the most secure algorithms to implement today, including RSA-2048 with OAEP and ECDH P-256 for robust key transport. Finally, it emphasizes the importance of using SHA-256 or higher for hashing to ensure message integrity and sender authenticity.
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