diff --git a/README.md b/README.md
index 756b8c71ca9..297d37a657e 100644
--- a/README.md
+++ b/README.md
@@ -307,7 +307,7 @@ Then visit `http://localhost:8005` to see the API docs.
 
 ## Initialization
 
-**Do not use `matrixClient.initCrypto()`. This method is deprecated and no longer maintained.**
+**Do not use `matrixClient.initLegacyCrypto()`. This method is deprecated and no longer maintained.**
 
 To initialize the end-to-end encryption support in the matrix client:
 
@@ -396,10 +396,10 @@ Once the cross-signing is set up on one of your devices, you can verify another
 
 ## Migrating from the legacy crypto stack to Rust crypto
 
-If your application previously used the legacy crypto stack, (i.e, it called `MatrixClient.initCrypto()`), you will
+If your application previously used the legacy crypto stack, (i.e, it called `MatrixClient.initLegacyCrypto()`), you will
 need to migrate existing devices to the Rust crypto stack.
 
-This migration happens automatically when you call `initRustCrypto()` instead of `initCrypto()`,
+This migration happens automatically when you call `initRustCrypto()` instead of `initLegacyCrypto()`,
 but you need to provide the legacy [`cryptoStore`](https://matrix-org.github.io/matrix-js-sdk/interfaces/matrix.ICreateClientOpts.html#cryptoStore) and [`pickleKey`](https://matrix-org.github.io/matrix-js-sdk/interfaces/matrix.ICreateClientOpts.html#pickleKey) to [`createClient`](https://matrix-org.github.io/matrix-js-sdk/functions/matrix.createClient.html):
 
 ```javascript
diff --git a/spec/integ/crypto/crypto.spec.ts b/spec/integ/crypto/crypto.spec.ts
index 5b219d1d51c..96d809aea99 100644
--- a/spec/integ/crypto/crypto.spec.ts
+++ b/spec/integ/crypto/crypto.spec.ts
@@ -1741,7 +1741,7 @@ describe.each(Object.entries(CRYPTO_BACKENDS))("crypto (%s)", (backend: string,
             groupSession: groupSession,
             room_id: ROOM_ID,
         });
-        await testClient.client.initCrypto();
+        await testClient.client.initLegacyCrypto();
         const keys = [
             {
                 room_id: ROOM_ID,
@@ -1853,7 +1853,7 @@ describe.each(Object.entries(CRYPTO_BACKENDS))("crypto (%s)", (backend: string,
 
     oldBackendOnly("Alice receives shared history before being invited to a room by the sharer", async () => {
         const beccaTestClient = new TestClient("@becca:localhost", "foobar", "bazquux");
-        await beccaTestClient.client.initCrypto();
+        await beccaTestClient.client.initLegacyCrypto();
 
         expectAliceKeyQuery({ device_keys: { "@alice:localhost": {} }, failures: {} });
         await startClientAndAwaitFirstSync();
@@ -2007,7 +2007,7 @@ describe.each(Object.entries(CRYPTO_BACKENDS))("crypto (%s)", (backend: string,
 
     oldBackendOnly("Alice receives shared history before being invited to a room by someone else", async () => {
         const beccaTestClient = new TestClient("@becca:localhost", "foobar", "bazquux");
-        await beccaTestClient.client.initCrypto();
+        await beccaTestClient.client.initLegacyCrypto();
 
         expectAliceKeyQuery({ device_keys: { "@alice:localhost": {} }, failures: {} });
         await startClientAndAwaitFirstSync();
diff --git a/spec/integ/crypto/olm-encryption-spec.ts b/spec/integ/crypto/olm-encryption-spec.ts
index 5977bda74ef..5b98c63936a 100644
--- a/spec/integ/crypto/olm-encryption-spec.ts
+++ b/spec/integ/crypto/olm-encryption-spec.ts
@@ -345,10 +345,10 @@ describe("MatrixClient crypto", () => {
 
     beforeEach(async () => {
         aliTestClient = new TestClient(aliUserId, aliDeviceId, aliAccessToken);
-        await aliTestClient.client.initCrypto();
+        await aliTestClient.client.initLegacyCrypto();
 
         bobTestClient = new TestClient(bobUserId, bobDeviceId, bobAccessToken);
-        await bobTestClient.client.initCrypto();
+        await bobTestClient.client.initLegacyCrypto();
 
         aliMessages = [];
         bobMessages = [];
diff --git a/spec/integ/devicelist-integ.spec.ts b/spec/integ/devicelist-integ.spec.ts
index 88388fdf9f7..ce741d8dc39 100644
--- a/spec/integ/devicelist-integ.spec.ts
+++ b/spec/integ/devicelist-integ.spec.ts
@@ -77,7 +77,7 @@ describe("DeviceList management:", function () {
 
     async function createTestClient() {
         const testClient = new TestClient("@alice:localhost", "xzcvb", "akjgkrgjs", sessionStoreBackend);
-        await testClient.client.initCrypto();
+        await testClient.client.initLegacyCrypto();
         return testClient;
     }
 
diff --git a/spec/integ/matrix-client-methods.spec.ts b/spec/integ/matrix-client-methods.spec.ts
index d5ec9677b19..e058426cbd7 100644
--- a/spec/integ/matrix-client-methods.spec.ts
+++ b/spec/integ/matrix-client-methods.spec.ts
@@ -650,9 +650,9 @@ describe("MatrixClient", function () {
         }
 
         beforeEach(function () {
-            // running initCrypto should trigger a key upload
+            // running initLegacyCrypto should trigger a key upload
             httpBackend.when("POST", "/keys/upload").respond(200, {});
-            return Promise.all([client.initCrypto(), httpBackend.flush("/keys/upload", 1)]);
+            return Promise.all([client.initLegacyCrypto(), httpBackend.flush("/keys/upload", 1)]);
         });
 
         afterEach(() => {
diff --git a/spec/integ/matrix-client-syncing.spec.ts b/spec/integ/matrix-client-syncing.spec.ts
index d3156f0fb12..2c0ab315bed 100644
--- a/spec/integ/matrix-client-syncing.spec.ts
+++ b/spec/integ/matrix-client-syncing.spec.ts
@@ -112,7 +112,7 @@ describe("MatrixClient syncing", () => {
         });
 
         it("should emit RoomEvent.MyMembership for invite->leave->invite cycles", async () => {
-            await client!.initCrypto();
+            await client!.initLegacyCrypto();
 
             const roomId = "!cycles:example.org";
 
@@ -227,7 +227,7 @@ describe("MatrixClient syncing", () => {
         });
 
         it("should emit RoomEvent.MyMembership for knock->leave->knock cycles", async () => {
-            await client!.initCrypto();
+            await client!.initLegacyCrypto();
 
             const roomId = "!cycles:example.org";
 
@@ -2573,7 +2573,7 @@ describe("MatrixClient syncing (IndexedDB version)", () => {
         idbHttpBackend.when("GET", "/pushrules/").respond(200, {});
         idbHttpBackend.when("POST", "/filter").respond(200, { filter_id: "a filter id" });
 
-        await idbClient.initCrypto();
+        await idbClient.initLegacyCrypto();
 
         const roomId = "!invite:example.org";
 
diff --git a/spec/integ/sliding-sync-sdk.spec.ts b/spec/integ/sliding-sync-sdk.spec.ts
index f6264530088..7b080351a6f 100644
--- a/spec/integ/sliding-sync-sdk.spec.ts
+++ b/spec/integ/sliding-sync-sdk.spec.ts
@@ -119,7 +119,7 @@ describe("SlidingSyncSdk", () => {
         mockSlidingSync = mockifySlidingSync(new SlidingSync("", new Map(), {}, client, 0));
         if (testOpts.withCrypto) {
             httpBackend!.when("GET", "/room_keys/version").respond(404, {});
-            await client!.initCrypto();
+            await client!.initLegacyCrypto();
             syncOpts.cryptoCallbacks = syncOpts.crypto = client!.crypto;
         }
         httpBackend!.when("GET", "/_matrix/client/v3/pushrules").respond(200, {});
diff --git a/spec/test-utils/test-utils.ts b/spec/test-utils/test-utils.ts
index 22e7006e47c..d0c9abb2a5d 100644
--- a/spec/test-utils/test-utils.ts
+++ b/spec/test-utils/test-utils.ts
@@ -561,7 +561,7 @@ export type InitCrypto = (_: MatrixClient) => Promise<void>;
 
 CRYPTO_BACKENDS["rust-sdk"] = (client: MatrixClient) => client.initRustCrypto();
 if (globalThis.Olm) {
-    CRYPTO_BACKENDS["libolm"] = (client: MatrixClient) => client.initCrypto();
+    CRYPTO_BACKENDS["libolm"] = (client: MatrixClient) => client.initLegacyCrypto();
 }
 
 export const emitPromise = (e: EventEmitter, k: string): Promise<any> => new Promise((r) => e.once(k, r));
diff --git a/spec/unit/crypto.spec.ts b/spec/unit/crypto.spec.ts
index ce2d2389212..419bb530a66 100644
--- a/spec/unit/crypto.spec.ts
+++ b/spec/unit/crypto.spec.ts
@@ -119,7 +119,7 @@ describe("Crypto", function () {
 
     it("getVersion() should return the current version of the olm library", async () => {
         const client = new TestClient("@alice:example.com", "deviceid").client;
-        await client.initCrypto();
+        await client.initLegacyCrypto();
 
         const olmVersionTuple = Crypto.getOlmVersion();
         expect(client.getCrypto()?.getVersion()).toBe(
@@ -130,7 +130,7 @@ describe("Crypto", function () {
     describe("encrypted events", function () {
         it("provides encryption information for events from unverified senders", async function () {
             const client = new TestClient("@alice:example.com", "deviceid").client;
-            await client.initCrypto();
+            await client.initLegacyCrypto();
 
             // unencrypted event
             const event = {
@@ -210,7 +210,7 @@ describe("Crypto", function () {
             let client: MatrixClient;
             beforeEach(async () => {
                 client = new TestClient("@alice:example.com", "deviceid").client;
-                await client.initCrypto();
+                await client.initLegacyCrypto();
 
                 // mock out the verification check
                 client.crypto!.checkUserTrust = (userId) => new UserTrustLevel(true, false, false);
@@ -306,7 +306,7 @@ describe("Crypto", function () {
 
         it("doesn't throw an error when attempting to decrypt a redacted event", async () => {
             const client = new TestClient("@alice:example.com", "deviceid").client;
-            await client.initCrypto();
+            await client.initLegacyCrypto();
 
             const event = new MatrixEvent({
                 content: {},
@@ -439,10 +439,10 @@ describe("Crypto", function () {
             secondAliceClient = new TestClient("@alice:example.com", "secondAliceDevice").client;
             bobClient = new TestClient("@bob:example.com", "bobdevice").client;
             claraClient = new TestClient("@clara:example.com", "claradevice").client;
-            await aliceClient.initCrypto();
-            await secondAliceClient.initCrypto();
-            await bobClient.initCrypto();
-            await claraClient.initCrypto();
+            await aliceClient.initLegacyCrypto();
+            await secondAliceClient.initLegacyCrypto();
+            await bobClient.initLegacyCrypto();
+            await claraClient.initLegacyCrypto();
         });
 
         afterEach(async function () {
@@ -1111,7 +1111,7 @@ describe("Crypto", function () {
             jest.spyOn(logger, "debug").mockImplementation(() => {});
             jest.setTimeout(10000);
             const client = new TestClient("@a:example.com", "dev").client;
-            await client.initCrypto();
+            await client.initLegacyCrypto();
             client.crypto!.isCrossSigningReady = async () => false;
             client.crypto!.baseApis.uploadDeviceSigningKeys = jest.fn().mockResolvedValue(null);
             client.crypto!.baseApis.setAccountData = jest.fn().mockResolvedValue(null);
@@ -1147,9 +1147,9 @@ describe("Crypto", function () {
 
             client = new TestClient("@alice:example.org", "aliceweb");
 
-            // running initCrypto should trigger a key upload
+            // running initLegacyCrypto should trigger a key upload
             client.httpBackend.when("POST", "/keys/upload").respond(200, {});
-            await Promise.all([client.client.initCrypto(), client.httpBackend.flush("/keys/upload", 1)]);
+            await Promise.all([client.client.initLegacyCrypto(), client.httpBackend.flush("/keys/upload", 1)]);
 
             encryptedPayload = {
                 algorithm: "m.olm.v1.curve25519-aes-sha2",
@@ -1264,9 +1264,9 @@ describe("Crypto", function () {
 
             client = new TestClient("@alice:example.org", "aliceweb");
 
-            // running initCrypto should trigger a key upload
+            // running initLegacyCrypto should trigger a key upload
             client.httpBackend.when("POST", "/keys/upload").respond(200, {});
-            await Promise.all([client.client.initCrypto(), client.httpBackend.flush("/keys/upload", 1)]);
+            await Promise.all([client.client.initLegacyCrypto(), client.httpBackend.flush("/keys/upload", 1)]);
 
             encryptedPayload = {
                 algorithm: "m.olm.v1.curve25519-aes-sha2",
@@ -1362,7 +1362,7 @@ describe("Crypto", function () {
 
         beforeEach(async () => {
             client = new TestClient("@alice:example.org", "aliceweb");
-            await client.client.initCrypto();
+            await client.client.initLegacyCrypto();
         });
 
         afterEach(async () => {
@@ -1388,7 +1388,7 @@ describe("Crypto", function () {
 
         beforeEach(async () => {
             client = new TestClient("@alice:example.org", "aliceweb");
-            await client.client.initCrypto();
+            await client.client.initLegacyCrypto();
         });
 
         afterEach(async () => {
@@ -1414,7 +1414,7 @@ describe("Crypto", function () {
 
         beforeEach(async () => {
             client = new TestClient("@alice:example.org", "aliceweb");
-            await client.client.initCrypto();
+            await client.client.initLegacyCrypto();
         });
 
         afterEach(async function () {
diff --git a/spec/unit/crypto/algorithms/megolm.spec.ts b/spec/unit/crypto/algorithms/megolm.spec.ts
index d2a1fbf3372..20d72702110 100644
--- a/spec/unit/crypto/algorithms/megolm.spec.ts
+++ b/spec/unit/crypto/algorithms/megolm.spec.ts
@@ -610,7 +610,11 @@ describe("MegolmDecryption", function () {
         const aliceClient = new TestClient("@alice:example.com", "alicedevice").client;
         const bobClient1 = new TestClient("@bob:example.com", "bobdevice1").client;
         const bobClient2 = new TestClient("@bob:example.com", "bobdevice2").client;
-        await Promise.all([aliceClient.initCrypto(), bobClient1.initCrypto(), bobClient2.initCrypto()]);
+        await Promise.all([
+            aliceClient.initLegacyCrypto(),
+            bobClient1.initLegacyCrypto(),
+            bobClient2.initLegacyCrypto(),
+        ]);
         const aliceDevice = aliceClient.crypto!.olmDevice;
         const bobDevice1 = bobClient1.crypto!.olmDevice;
         const bobDevice2 = bobClient2.crypto!.olmDevice;
@@ -704,7 +708,7 @@ describe("MegolmDecryption", function () {
     it("does not block unverified devices when sending verification events", async function () {
         const aliceClient = new TestClient("@alice:example.com", "alicedevice").client;
         const bobClient = new TestClient("@bob:example.com", "bobdevice").client;
-        await Promise.all([aliceClient.initCrypto(), bobClient.initCrypto()]);
+        await Promise.all([aliceClient.initLegacyCrypto(), bobClient.initLegacyCrypto()]);
         const bobDevice = bobClient.crypto!.olmDevice;
 
         const encryptionCfg = {
@@ -789,7 +793,7 @@ describe("MegolmDecryption", function () {
     it("notifies devices when unable to create olm session", async function () {
         const aliceClient = new TestClient("@alice:example.com", "alicedevice").client;
         const bobClient = new TestClient("@bob:example.com", "bobdevice").client;
-        await Promise.all([aliceClient.initCrypto(), bobClient.initCrypto()]);
+        await Promise.all([aliceClient.initLegacyCrypto(), bobClient.initLegacyCrypto()]);
         const aliceDevice = aliceClient.crypto!.olmDevice;
         const bobDevice = bobClient.crypto!.olmDevice;
 
@@ -873,7 +877,7 @@ describe("MegolmDecryption", function () {
     it("throws an error describing why it doesn't have a key", async function () {
         const aliceClient = new TestClient("@alice:example.com", "alicedevice").client;
         const bobClient = new TestClient("@bob:example.com", "bobdevice").client;
-        await Promise.all([aliceClient.initCrypto(), bobClient.initCrypto()]);
+        await Promise.all([aliceClient.initLegacyCrypto(), bobClient.initLegacyCrypto()]);
         const bobDevice = bobClient.crypto!.olmDevice;
 
         const aliceEventEmitter = new TypedEventEmitter<ClientEvent.ToDeviceEvent, any>();
@@ -955,7 +959,7 @@ describe("MegolmDecryption", function () {
     it("throws an error describing the lack of an olm session", async function () {
         const aliceClient = new TestClient("@alice:example.com", "alicedevice").client;
         const bobClient = new TestClient("@bob:example.com", "bobdevice").client;
-        await Promise.all([aliceClient.initCrypto(), bobClient.initCrypto()]);
+        await Promise.all([aliceClient.initLegacyCrypto(), bobClient.initLegacyCrypto()]);
 
         const aliceEventEmitter = new TypedEventEmitter<ClientEvent.ToDeviceEvent, any>();
         aliceClient.crypto!.registerEventHandlers(aliceEventEmitter);
@@ -1051,7 +1055,7 @@ describe("MegolmDecryption", function () {
     it("throws an error to indicate a wedged olm session", async function () {
         const aliceClient = new TestClient("@alice:example.com", "alicedevice").client;
         const bobClient = new TestClient("@bob:example.com", "bobdevice").client;
-        await Promise.all([aliceClient.initCrypto(), bobClient.initCrypto()]);
+        await Promise.all([aliceClient.initLegacyCrypto(), bobClient.initLegacyCrypto()]);
         const aliceEventEmitter = new TypedEventEmitter<ClientEvent.ToDeviceEvent, any>();
         aliceClient.crypto!.registerEventHandlers(aliceEventEmitter);
 
diff --git a/spec/unit/crypto/backup.spec.ts b/spec/unit/crypto/backup.spec.ts
index 28bb0d4c443..c210d14c80b 100644
--- a/spec/unit/crypto/backup.spec.ts
+++ b/spec/unit/crypto/backup.spec.ts
@@ -231,7 +231,7 @@ describe("MegolmBackup", function () {
 
         test("fail if given backup has no version", async () => {
             const client = makeTestClient(cryptoStore);
-            await client.initCrypto();
+            await client.initLegacyCrypto();
             const data = {
                 algorithm: olmlib.MEGOLM_BACKUP_ALGORITHM,
                 auth_data: {
@@ -314,7 +314,7 @@ describe("MegolmBackup", function () {
             megolmDecryption.olmlib = mockOlmLib;
 
             return client
-                .initCrypto()
+                .initLegacyCrypto()
                 .then(() => {
                     return cryptoStore.doTxn("readwrite", [IndexedDBCryptoStore.STORE_SESSIONS], (txn) => {
                         cryptoStore.addEndToEndInboundGroupSession(
@@ -391,7 +391,7 @@ describe("MegolmBackup", function () {
             megolmDecryption.olmlib = mockOlmLib;
 
             return client
-                .initCrypto()
+                .initLegacyCrypto()
                 .then(() => {
                     return client.crypto!.storeSessionBackupPrivateKey(new Uint8Array(32));
                 })
@@ -471,7 +471,7 @@ describe("MegolmBackup", function () {
             // @ts-ignore private field access
             megolmDecryption.olmlib = mockOlmLib;
 
-            await client.initCrypto();
+            await client.initLegacyCrypto();
             client.uploadDeviceSigningKeys = async function (e) {
                 return {};
             };
@@ -560,7 +560,7 @@ describe("MegolmBackup", function () {
             // @ts-ignore private field access
             megolmDecryption.olmlib = mockOlmLib;
 
-            await client.initCrypto();
+            await client.initLegacyCrypto();
             await cryptoStore.doTxn("readwrite", [IndexedDBCryptoStore.STORE_SESSIONS], (txn) => {
                 cryptoStore.addEndToEndInboundGroupSession(
                     "F0Q2NmyJNgUVj9DGsb4ZQt3aVxhVcUQhg7+gvW0oyKI",
@@ -636,7 +636,7 @@ describe("MegolmBackup", function () {
             // @ts-ignore private field access
             megolmDecryption.olmlib = mockOlmLib;
 
-            return client.initCrypto();
+            return client.initLegacyCrypto();
         });
 
         afterEach(function () {
@@ -773,7 +773,7 @@ describe("MegolmBackup", function () {
             // initialising the crypto library will trigger a key upload request, which we can stub out
             client.uploadKeysRequest = jest.fn();
 
-            await client.initCrypto();
+            await client.initLegacyCrypto();
 
             cryptoStore.countSessionsNeedingBackup = jest.fn().mockReturnValue(6);
             await expect(client.flagAllGroupSessionsForBackup()).resolves.toBe(6);
@@ -784,7 +784,7 @@ describe("MegolmBackup", function () {
     describe("getKeyBackupInfo", () => {
         it("should return throw an `Not implemented`", async () => {
             const client = makeTestClient(cryptoStore);
-            await client.initCrypto();
+            await client.initLegacyCrypto();
             await expect(client.getCrypto()?.getKeyBackupInfo()).rejects.toThrow("Not implemented");
         });
     });
diff --git a/spec/unit/crypto/cross-signing.spec.ts b/spec/unit/crypto/cross-signing.spec.ts
index 967c86ca69a..a8b7fa2624b 100644
--- a/spec/unit/crypto/cross-signing.spec.ts
+++ b/spec/unit/crypto/cross-signing.spec.ts
@@ -78,7 +78,7 @@ async function makeTestClient(
     const testClient = new TestClient(userInfo.userId, userInfo.deviceId, undefined, undefined, options);
     const client = testClient.client;
 
-    await client.initCrypto();
+    await client.initLegacyCrypto();
 
     return { client, httpBackend: testClient.httpBackend };
 }
diff --git a/spec/unit/crypto/dehydration.spec.ts b/spec/unit/crypto/dehydration.spec.ts
index 37893230a46..d9a0dac895e 100644
--- a/spec/unit/crypto/dehydration.spec.ts
+++ b/spec/unit/crypto/dehydration.spec.ts
@@ -68,7 +68,7 @@ describe("Dehydration", () => {
             },
         });
 
-        await alice.client.initCrypto();
+        await alice.client.initLegacyCrypto();
 
         alice.httpBackend.when("GET", "/room_keys/version").respond(404, {
             errcode: "M_NOT_FOUND",
diff --git a/spec/unit/crypto/secrets.spec.ts b/spec/unit/crypto/secrets.spec.ts
index d7c7516a98b..88b011870f0 100644
--- a/spec/unit/crypto/secrets.spec.ts
+++ b/spec/unit/crypto/secrets.spec.ts
@@ -43,7 +43,7 @@ async function makeTestClient(
         return true;
     };
 
-    await client.initCrypto();
+    await client.initLegacyCrypto();
 
     // No need to download keys for these tests
     jest.spyOn(client.crypto!, "downloadKeys").mockResolvedValue(new Map());
diff --git a/spec/unit/crypto/verification/util.ts b/spec/unit/crypto/verification/util.ts
index 6454fd6004a..16a18559870 100644
--- a/spec/unit/crypto/verification/util.ts
+++ b/spec/unit/crypto/verification/util.ts
@@ -119,7 +119,7 @@ export async function makeTestClients(
         clients.push(testClient);
     }
 
-    await Promise.all(clients.map((testClient) => testClient.client.initCrypto()));
+    await Promise.all(clients.map((testClient) => testClient.client.initLegacyCrypto()));
 
     const destroy = () => {
         timeouts.forEach((t) => clearTimeout(t));
diff --git a/src/client.ts b/src/client.ts
index 478e2784e51..332671dc795 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -294,7 +294,7 @@ export interface ICreateClientOpts {
      * specified, uses a default implementation (indexeddb in the browser,
      * in-memory otherwise).
      *
-     * This is only used for the legacy crypto implementation (as used by {@link MatrixClient#initCrypto}),
+     * This is only used for the legacy crypto implementation (as used by {@link MatrixClient#initLegacyCrypto}),
      * but if you use the rust crypto implementation ({@link MatrixClient#initRustCrypto}) and the device
      * previously used legacy crypto (so must be migrated), then this must still be provided, so that the
      * data can be migrated from the legacy store.
@@ -389,7 +389,7 @@ export interface ICreateClientOpts {
      *
      * This must be set to the same value every time the client is initialised for the same device.
      *
-     * This is only used for the legacy crypto implementation (as used by {@link MatrixClient#initCrypto}),
+     * This is only used for the legacy crypto implementation (as used by {@link MatrixClient#initLegacyCrypto}),
      * but if you use the rust crypto implementation ({@link MatrixClient#initRustCrypto}) and the device
      * previously used legacy crypto (so must be migrated), then this must still be provided, so that the
      * data can be migrated from the legacy store.
@@ -1222,7 +1222,7 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
     private readonly logger: Logger;
 
     public reEmitter = new TypedReEmitter<EmittedEvents, ClientEventHandlerMap>(this);
-    public olmVersion: [number, number, number] | null = null; // populated after initCrypto
+    public olmVersion: [number, number, number] | null = null; // populated after initLegacyCrypto
     public usingExternalCrypto = false;
     private _store!: Store;
     public deviceId: string | null;
@@ -1605,7 +1605,7 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
     /**
      * Try to rehydrate a device if available.  The client must have been
      * initialized with a `cryptoCallback.getDehydrationKey` option, and this
-     * function must be called before initCrypto and startClient are called.
+     * function must be called before initLegacyCrypto and startClient are called.
      *
      * @returns Promise which resolves to undefined if a device could not be dehydrated, or
      *     to the new device ID if the dehydration was successful.
@@ -2147,7 +2147,7 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
      *
      * @deprecated libolm is deprecated. Prefer {@link initRustCrypto}.
      */
-    public async initCrypto(): Promise<void> {
+    public async initLegacyCrypto(): Promise<void> {
         if (!isCryptoAvailable()) {
             throw new Error(
                 `End-to-end encryption not supported in this js-sdk build: did ` +
@@ -2220,7 +2220,7 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
     /**
      * Initialise support for end-to-end encryption in this client, using the rust matrix-sdk-crypto.
      *
-     * An alternative to {@link initCrypto}.
+     * An alternative to {@link initLegacyCrypto}.
      *
      * @param args.useIndexedDB - True to use an indexeddb store, false to use an in-memory store. Defaults to 'true'.
      * @param args.storageKey - A key with which to encrypt the indexeddb store. If provided, it must be exactly
@@ -2317,7 +2317,7 @@ export class MatrixClient extends TypedEventEmitter<EmittedEvents, ClientEventHa
     /**
      * Access the crypto API for this client.
      *
-     * If end-to-end encryption has been enabled for this client (via {@link initCrypto} or {@link initRustCrypto}),
+     * If end-to-end encryption has been enabled for this client (via {@link initLegacyCrypto} or {@link initRustCrypto}),
      * returns an object giving access to the crypto API. Otherwise, returns `undefined`.
      */
     public getCrypto(): CryptoApi | undefined {