diff --git a/lib/net/imap/stringprep.rb b/lib/net/imap/stringprep.rb
index 1324cbbb..25c2cbdc 100644
--- a/lib/net/imap/stringprep.rb
+++ b/lib/net/imap/stringprep.rb
@@ -9,6 +9,7 @@ class IMAP < Protocol
     # codepoint table defined in the RFC-3454 appendices is matched by a Regexp
     # defined in this module.
     module StringPrep
+      autoload :ISCSI,    File.expand_path("stringprep/iscsi",    __dir__)
       autoload :NamePrep, File.expand_path("stringprep/nameprep", __dir__)
       autoload :SASLprep, File.expand_path("stringprep/saslprep", __dir__)
       autoload :Tables,   File.expand_path("stringprep/tables",   __dir__)
diff --git a/lib/net/imap/stringprep/iscsi.rb b/lib/net/imap/stringprep/iscsi.rb
new file mode 100644
index 00000000..b0a0c81c
--- /dev/null
+++ b/lib/net/imap/stringprep/iscsi.rb
@@ -0,0 +1,115 @@
+# frozen_string_literal: true
+
+module Net
+  class IMAP
+    module StringPrep
+
+      # Defined in RFC3722[https://tools.ietf.org/html/rfc3722], the +iSCSI+
+      # profile of "Stringprep" is used to:
+      # >>>
+      #   prepare internationalized iSCSI names to increase the likelihood that
+      #   name input and comparison work in ways that make sense for typical
+      #   users throughout the world.
+      #
+      #   ...
+      #
+      #   The goal, then, is to generate iSCSI names that can be transcribed and
+      #   entered by users, and also compared byte-for-byte, with minimal
+      #   confusion.  To attain these goals, iSCSI names are generalized using a
+      #   normalized character set (converted to lower case or equivalent), with
+      #   no white space allowed, and very limited punctuation.
+      #
+      #   - The intended applicability of the profile: internationalized iSCSI
+      #     names.
+      #   - The character repertoire that is the input and output to
+      #     stringprep: Unicode 3.2, specified in section 3.
+      #   - The mappings used: specified in section 4.
+      #   - The Unicode normalization used: specified in section 5.
+      #   - The characters that are prohibited as output: specified in section 6.
+      #
+      #   This profile MUST be used with the iSCSI protocol.
+      module ISCSI
+
+        STRINGPREP_PROFILE = "iSCSI"
+
+        # From RFC3722[https://www.rfc-editor.org/rfc/rfc3722.html] §2
+        UNASSIGNED_TABLE = "A.1"
+
+        # From RFC3722[https://www.rfc-editor.org/rfc/rfc3722.html] §3
+        MAPPING_TABLES = %w[B.1 B.2].freeze
+
+        # From RFC3722[https://www.rfc-editor.org/rfc/rfc3722.html] §5
+        NORMALIZATION = :nfkc
+
+        # From RFC3722[https://www.rfc-editor.org/rfc/rfc3722.html] §6
+        PROHIBITED_TABLES = %w[C.1.1 C.1.2 C.2.1 C.2.2 C.3 C.4 C.5 C.6 C.7 C.8 C.9].freeze
+
+        # From RFC3722[https://www.rfc-editor.org/rfc/rfc3722.html] §6.1:
+        # >>>
+        #   6.1.  Inappropriate Characters from Common Input Mechanisms
+        #
+        #   u+3002 is used as if it were u+002e in many domain name input
+        #   mechanisms used by applications, particularly in Asia.  The character
+        #   u+3002 MUST NOT be used in an iSCSI name.
+        #
+        #      3002; ideographic full stop
+        INAPPROPRIATE_FROM_COMMON_INPUT_MECHANISMS = /\u{3002}/.freeze
+
+        # From RFC3722[https://www.rfc-editor.org/rfc/rfc3722.html] §6.2:
+        # >>>
+        #   6.2.  Currently-prohibited ASCII characters
+        #
+        #   Some of the ASCII characters that are currently prohibited in iSCSI
+        #   names by [RFC3721] are also used in protocol elements such as URIs.
+        #   Some examples are described in [RFC2396] and [RFC2732].  Note that
+        #   there are many other RFCs that define additional URI schemes.
+        #
+        #   The other characters in the range U+0000 to U+007F that are not
+        #   currently allowed are prohibited in iSCSI names to reserve them for
+        #   future use in protocol elements.  Note that the dash (U+002D), dot
+        #   (U+002E), and colon (U+003A) are not prohibited.
+        #
+        #   The following characters MUST NOT be used in iSCSI names:
+        #
+        #      0000-002C; [ASCII CONTROL CHARACTERS and SPACE through ,]
+        #      002F; [ASCII /]
+        #      003B-0040; [ASCII ; through @]
+        #      005B-0060; [ASCII [ through `]
+        #      007B-007F; [ASCII { through DEL]
+        PROHIBITED_ASCII = /[\x00-\x2c\x2f\x3b-\x40\x5b-\x60\x7B-\x7f]/.freeze
+
+        # From RFC3722[https://www.rfc-editor.org/rfc/rfc3722.html] §6.2:
+        #   In addition, this profile adds the following prohibitions.  The full
+        #   set of prohibited characters are those from the tables above plus
+        #   those listed individually below.
+        PROHIBITED_REGEXP = [
+          PROHIBITED_ASCII,
+          INAPPROPRIATE_FROM_COMMON_INPUT_MECHANISMS,
+        ]
+          .map(&:source).join
+          .then { /[#{_1}]/ }
+          .freeze
+
+        # From RFC3722[https://www.rfc-editor.org/rfc/rfc3722.html] §7
+        CHECK_BIDI = true
+
+        module_function
+
+        def stringprep_iscsi(string, **opts)
+          StringPrep.stringprep(
+            string,
+            unassigned:    UNASSIGNED_TABLE,
+            maps:          MAPPING_TABLES,
+            prohibited:    [*PROHIBITED_TABLES, PROHIBITED_REGEXP],
+            normalization: NORMALIZATION,
+            bidi:          CHECK_BIDI,
+            profile:       STRINGPREP_PROFILE,
+            **opts,
+          )
+        end
+
+      end
+
+    end
+  end
+end
diff --git a/test/net/imap/test_stringprep_profiles.rb b/test/net/imap/test_stringprep_profiles.rb
index 5487ffbb..498e96d5 100644
--- a/test/net/imap/test_stringprep_profiles.rb
+++ b/test/net/imap/test_stringprep_profiles.rb
@@ -6,6 +6,7 @@
 class StringPrepProfilesTest < Test::Unit::TestCase
   include Net::IMAP::StringPrep
   include Net::IMAP::StringPrep::Trace
+  include Net::IMAP::StringPrep::ISCSI
 
   def test_trace_profile_prohibit_ctrl_chars
     assert_raise(ProhibitedCodepoint) {
@@ -22,4 +23,14 @@ def test_trace_profile_prohibit_tagging_chars
     }
   end
 
+  def test_iscsi_profile_case_maps
+    assert_equal "hêllω-woŗλd", stringprep_iscsi("HÊlLΩ-WoŖΛd")
+  end
+
+  def test_iscsi_profile_prohibit_ideographic_full_stop
+    assert_raise(ProhibitedCodepoint) {
+      stringprep_iscsi "hello\u{3002}world"
+    }
+  end
+
 end