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+= Security Levels
+
+Version: 1.0.1.6
+
+
+== S0
+
+Intended access: Public
+
+Encryption: None
+
+Signing: Optional
+
+== S1
+
+Intended access: Authorised users of S1 or lower security levels
+
+Encryption: Enforced
+
+Signing: Enforced
+
+Permitted symmetrical encryption ciphers (order of preference):
+
+* AES
+* ChaCha20*
+* Twofish
+
+== S2
+
+Intended access: Authorised users of S2 or lower security levels
+
+Encryption: Enforced
+
+Signing: Enforced
+
+Permitted symmetrical encryption ciphers (order of preference):
+
+* AES
+* ChaCha20*
+* Twofish
+
+== S3
+
+Intended access: Authorised users of s3 or lower security levels
+
+Encryption: Enforced
+
+Signing: Enforced
+
+Permitted symmetrical encryption ciphers (order of preference):
+
+* AES
+* ChaCha20*
+
+== S4
+
+Intended access: Authorised users of s4 or lower security levels
+
+Encryption: Enforced
+
+Signing: Enforced
+
+Permitted symmetrical encryption ciphers (order of preference):
+
+* AES
+* ChaCha20*
+
+*Preferred when hardware-accelerated AES is unavailable.