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Concept:
When transmitting secret information, you must ensure confidentiality (encryption in transit), integrity (protection against tampering), authenticity (verification of sender/receiver), and secure key management (protect, rotate, and restrict access to keys).
Use a proven secure channel (TLS 1.3+ or equivalent), strong authentication, and auditable logs; include anti-replay protection and least-privilege access.
– Example (clear): Use TLS
1.3 with mutual authentication to send a confidential file.
Data is encrypted in transit, both sides authenticate with certificates, keys are stored in an HSM and rotated regularly, and transmissions are logged for audit.
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Concept:
Practical controls should avoid insecure channels, verify recipients, and enforce data minimization and retention policies.
– Brief example: Share the secret file via a secure file-transfer service that provides end-to-end encryption and recipient verification.