diff --git a/packages/apidom-ls/src/config/codes.ts b/packages/apidom-ls/src/config/codes.ts
index bd31e6e8f6..1c415e3274 100644
--- a/packages/apidom-ls/src/config/codes.ts
+++ b/packages/apidom-ls/src/config/codes.ts
@@ -848,6 +848,9 @@ enum ApilintCodes {
   OPENAPI3_1_REFERENCE = 7040000,
   OPENAPI3_1_REFERENCE_FIELD_$REF_ALLOWED_SIBLINGS = 7040100,
 
+  OPENAPI3_1_SECURITY_SCHEME = 7050000,
+  OPENAPI3_1_SECURITY_SCHEME_FIELD_TYPE_EQUALS = 7050100,
+
   ADS = 8000000,
   ADS_INFO = 8010000,
   ADS_INFO_REQUIRED = 8010010,
diff --git a/packages/apidom-ls/src/config/openapi/security-scheme/completion.ts b/packages/apidom-ls/src/config/openapi/security-scheme/completion.ts
index d2058d1961..e2eab550b7 100644
--- a/packages/apidom-ls/src/config/openapi/security-scheme/completion.ts
+++ b/packages/apidom-ls/src/config/openapi/security-scheme/completion.ts
@@ -36,6 +36,20 @@ const completion: ApidomCompletionItem[] = [
       { namespace: 'openapi', version: '3.0.3' },
     ],
   },
+  {
+    label: 'type',
+    insertText: 'type',
+    kind: 14,
+    format: CompletionFormat.QUOTED,
+    type: CompletionType.PROPERTY,
+    insertTextFormat: 2,
+    documentation: {
+      kind: 'markdown',
+      value:
+        '**REQUIRED**. The type of the security scheme. Valid values are `"apiKey"`, `"http"`, `"mutualTLS"`, `"oauth2"`, `"openIdConnect"`.',
+    },
+    targetSpecs: [{ namespace: 'openapi', version: '3.1.0' }],
+  },
   {
     label: 'description',
     insertText: 'description',
@@ -120,6 +134,20 @@ const completion: ApidomCompletionItem[] = [
       { namespace: 'openapi', version: '3.0.3' },
     ],
   },
+  {
+    label: 'flows',
+    insertText: 'flows',
+    kind: 14,
+    format: CompletionFormat.OBJECT,
+    type: CompletionType.PROPERTY,
+    insertTextFormat: 2,
+    documentation: {
+      kind: 'markdown',
+      value:
+        '[OAuth Flows Object](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#oauthFlowsObject)\n\\\nApplies to `oauth2`. **REQUIRED**. An object containing configuration information for the flow types supported.',
+    },
+    targetSpecs: [{ namespace: 'openapi', version: '3.1.0' }],
+  },
   {
     label: 'openIdConnectUrl',
     insertText: 'openIdConnectUrl',
diff --git a/packages/apidom-ls/src/config/openapi/security-scheme/lint/allowed-fields-3-1.ts b/packages/apidom-ls/src/config/openapi/security-scheme/lint/allowed-fields-3-1.ts
new file mode 100644
index 0000000000..22b86b178c
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/security-scheme/lint/allowed-fields-3-1.ts
@@ -0,0 +1,25 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+// eslint-disable-next-line @typescript-eslint/naming-convention
+const allowedFields3_1Lint: LinterMeta = {
+  code: ApilintCodes.NOT_ALLOWED_FIELDS,
+  source: 'apilint',
+  message: 'Object includes not allowed fields',
+  severity: 1,
+  linterFunction: 'allowedFields',
+  linterParams: [
+    ['type', 'description', 'name', 'in', 'scheme', 'bearerFormat', 'flows', 'openIdConnectUrl'],
+    'x-',
+  ],
+  marker: 'key',
+  conditions: [
+    {
+      function: 'missingField',
+      params: ['$ref'],
+    },
+  ],
+  targetSpecs: [{ namespace: 'openapi', version: '3.1.0' }],
+};
+
+export default allowedFields3_1Lint;
diff --git a/packages/apidom-ls/src/config/openapi/security-scheme/lint/index.ts b/packages/apidom-ls/src/config/openapi/security-scheme/lint/index.ts
index 2266219c12..1f1097da60 100644
--- a/packages/apidom-ls/src/config/openapi/security-scheme/lint/index.ts
+++ b/packages/apidom-ls/src/config/openapi/security-scheme/lint/index.ts
@@ -1,5 +1,7 @@
 import allowedFields3_0Lint from './allowed-fields-3-0';
+import allowedFields3_1Lint from './allowed-fields-3-1';
 import typeEquals3_0Lint from './type--equals-3-0';
+import typeEquals3_1Lint from './type--equals-3-1';
 import descriptionTypeLint from './description--type';
 import nameTypeLint from './name--type';
 import nameRequiredLint from './name--required';
@@ -15,6 +17,7 @@ import openIdConnectUrlRequiredLint from './open-id-connect-url--required';
 
 const lints = [
   typeEquals3_0Lint,
+  typeEquals3_1Lint,
   descriptionTypeLint,
   nameTypeLint,
   nameRequiredLint,
@@ -28,6 +31,7 @@ const lints = [
   openIdConnectUrlFormatURILint,
   openIdConnectUrlRequiredLint,
   allowedFields3_0Lint,
+  allowedFields3_1Lint,
 ];
 
 export default lints;
diff --git a/packages/apidom-ls/src/config/openapi/security-scheme/lint/type--equals-3-0.ts b/packages/apidom-ls/src/config/openapi/security-scheme/lint/type--equals-3-0.ts
index b93d06cbbf..99b1034670 100644
--- a/packages/apidom-ls/src/config/openapi/security-scheme/lint/type--equals-3-0.ts
+++ b/packages/apidom-ls/src/config/openapi/security-scheme/lint/type--equals-3-0.ts
@@ -11,6 +11,12 @@ const typeEquals3_0Lint: LinterMeta = {
   linterParams: [['apiKey', 'http', 'oauth2', 'openIdConnect']],
   marker: 'value',
   target: 'type',
+  targetSpecs: [
+    { namespace: 'openapi', version: '3.0.0' },
+    { namespace: 'openapi', version: '3.0.1' },
+    { namespace: 'openapi', version: '3.0.2' },
+    { namespace: 'openapi', version: '3.0.3' },
+  ],
 };
 
 export default typeEquals3_0Lint;
diff --git a/packages/apidom-ls/src/config/openapi/security-scheme/lint/type--equals-3-1.ts b/packages/apidom-ls/src/config/openapi/security-scheme/lint/type--equals-3-1.ts
new file mode 100644
index 0000000000..f133b0a193
--- /dev/null
+++ b/packages/apidom-ls/src/config/openapi/security-scheme/lint/type--equals-3-1.ts
@@ -0,0 +1,17 @@
+import ApilintCodes from '../../../codes';
+import { LinterMeta } from '../../../../apidom-language-types';
+
+// eslint-disable-next-line @typescript-eslint/naming-convention
+const typeEquals3_1Lint: LinterMeta = {
+  code: ApilintCodes.OPENAPI3_1_SECURITY_SCHEME_FIELD_TYPE_EQUALS,
+  source: 'apilint',
+  message: 'type must be one of allowed values',
+  severity: 1,
+  linterFunction: 'apilintValueOrArray',
+  linterParams: [['apiKey', 'http', 'mutualTLS', 'oauth2', 'openIdConnect']],
+  marker: 'value',
+  target: 'type',
+  targetSpecs: [{ namespace: 'openapi', version: '3.1.0' }],
+};
+
+export default typeEquals3_1Lint;