Cipher Security Level—Lists the cipher security levels that
the ASA supports and uses for SSL connections. Choose one of the following
All includes all ciphers, including NULL-SHA.
Low includes all ciphers, except NULL-SHA.
Medium includes all ciphers, except NULL-SHA, DES-CBC-SHA,
RC4-SHA, and RC4-MD5 (this is the default).
Fips includes all FIPS-compliant ciphers, except NULL-SHA,
DES-CBC-SHA, RC4-MD5, RC4-SHA, and DES-CBC3-SHA.
High includes only AES-256 with SHA-2 ciphers and applies
only to TLS version 1.2.
Custom includes one or more ciphers that you specify in the
Cipher algorithms/custom string box. This option provides you with full control
of the cipher suite using OpenSSL cipher definition strings.