diff --git a/packages/cactus-core-api/src/main/typescript/plugin/keychain/i-plugin-keychain.ts b/packages/cactus-core-api/src/main/typescript/plugin/keychain/i-plugin-keychain.ts
index 03b3b029b9..525aef23b5 100644
--- a/packages/cactus-core-api/src/main/typescript/plugin/keychain/i-plugin-keychain.ts
+++ b/packages/cactus-core-api/src/main/typescript/plugin/keychain/i-plugin-keychain.ts
@@ -5,8 +5,6 @@ import { ICactusPlugin } from "../i-cactus-plugin";
  * keychains.
  */
 export interface IPluginKeychain extends ICactusPlugin {
-  rotateEncryptionKeys(): Promise<void>;
-  getEncryptionAlgorithm(): string;
   /**
    * Returns the unique identifier of the keychain pointed to (or backed) by
    * this `IPluginKeychain` instance.
diff --git a/packages/cactus-plugin-keychain-memory/src/main/typescript/plugin-keychain-memory.ts b/packages/cactus-plugin-keychain-memory/src/main/typescript/plugin-keychain-memory.ts
index 3d75cf91ab..9339eb1f30 100644
--- a/packages/cactus-plugin-keychain-memory/src/main/typescript/plugin-keychain-memory.ts
+++ b/packages/cactus-plugin-keychain-memory/src/main/typescript/plugin-keychain-memory.ts
@@ -65,14 +65,6 @@ export class PluginKeychainMemory {
     return PluginAspect.KEYCHAIN;
   }
 
-  async rotateEncryptionKeys(): Promise<void> {
-    throw new Error("Method not implemented.");
-  }
-
-  public getEncryptionAlgorithm(): string {
-    return null as any;
-  }
-
   async get<T>(key: string): Promise<T> {
     return this.backend.get(key);
   }
diff --git a/packages/cactus-plugin-keychain-memory/src/test/typescript/unit/plugin-keychain-memory.test.ts b/packages/cactus-plugin-keychain-memory/src/test/typescript/unit/plugin-keychain-memory.test.ts
index 5844578d15..376661d144 100644
--- a/packages/cactus-plugin-keychain-memory/src/test/typescript/unit/plugin-keychain-memory.test.ts
+++ b/packages/cactus-plugin-keychain-memory/src/test/typescript/unit/plugin-keychain-memory.test.ts
@@ -82,31 +82,5 @@ test("PluginKeychainMemory", (t1: Test) => {
     t.end();
   });
 
-  test("rotateEncryptionKeys() fails fast", async (t: Test) => {
-    const options: IPluginKeychainMemoryOptions = {
-      instanceId: uuidv4(),
-      keychainId: uuidv4(),
-    };
-    const plugin = new PluginKeychainMemory(options);
-
-    const promise = plugin.rotateEncryptionKeys();
-    const expected = /not implemented/;
-    await t.rejects(promise, expected, "rotateEncryptionKeys() rejects OK");
-
-    t.end();
-  });
-
-  test("getEncryptionAlgorithm() returns null", (t: Test) => {
-    const options: IPluginKeychainMemoryOptions = {
-      instanceId: uuidv4(),
-      keychainId: uuidv4(),
-    };
-    const plugin = new PluginKeychainMemory(options);
-
-    t.notok(plugin.getEncryptionAlgorithm(), "encryption algorithm falsy OK");
-
-    t.end();
-  });
-
   t1.end();
 });