Base64 body encoding
04Base64 converts body octets into a restricted alphabet suitable for mail transport.
Related RFCs and changes
“Updates” changes part of an earlier RFC. “Obsoletes” replaces it. This list shows selected related documents.
DIAGRAM§ 6.8 ↗
RFC 2045 · § 6.8EXAMPLE
3 / 3
03
Wrap for MIME transport
Use the MIME line-length rules, distinct from generic no-wrap Base64 profiles.
Protocol participantThreat or exceptionProtocol controlSimplified drawings · precise section references
Read the updated RFC section ↗
Three bytes become four encoded characters.
- Three bytes become four encoded characters.
- MIME encoded lines must not exceed 76 characters.
- Base64 adds no confidentiality or authenticity.
Examples are illustrative. Consult the linked RFC and its errata for implementation details.
Read the RFC section ↗Diagrams simplify the RFC. Read the linked sections for complete requirements.
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