diff --git a/addons/api/mirage/factories/account.js b/addons/api/mirage/factories/account.js
index f5da7b5af..9ab7b259b 100644
--- a/addons/api/mirage/factories/account.js
+++ b/addons/api/mirage/factories/account.js
@@ -1,6 +1,7 @@
 import factory from '../generated/factories/account';
 import { random, internet } from 'faker';
 import permissions from '../helpers/permissions';
+import generateId from '../helpers/id';
 
 export default factory.extend({
   authorized_actions: () =>
@@ -11,6 +12,9 @@ export default factory.extend({
       'delete',
       'set-password',
     ],
+
+  id: () => generateId('acct_'),
+
   attributes() {
     switch (this.type) {
       case 'password':
diff --git a/addons/api/mirage/factories/auth-method.js b/addons/api/mirage/factories/auth-method.js
index 2196a13a3..f89e752e3 100644
--- a/addons/api/mirage/factories/auth-method.js
+++ b/addons/api/mirage/factories/auth-method.js
@@ -1,6 +1,7 @@
 import factory from '../generated/factories/auth-method';
 import { trait } from 'ember-cli-mirage';
 import permissions from '../helpers/permissions';
+import generateId from '../helpers/id';
 
 const types = ['password', 'oidc'];
 
@@ -18,7 +19,8 @@ export default factory.extend({
       'managed-groups': ['create', 'list'],
     };
   },
-  id: (i) => `auth-method-id-${i}`,
+
+  id: () => generateId('am_'),
 
   // Cycle through available types
   type: (i) => types[i % types.length],
diff --git a/addons/api/mirage/factories/credential-library.js b/addons/api/mirage/factories/credential-library.js
index 621ae6410..4aed98912 100644
--- a/addons/api/mirage/factories/credential-library.js
+++ b/addons/api/mirage/factories/credential-library.js
@@ -1,11 +1,12 @@
 import factory from '../generated/factories/credential-library';
 import { random, system } from 'faker';
 import permissions from '../helpers/permissions';
+import generateId from '../helpers/id';
 
 const types = ['vault'];
 
 export default factory.extend({
-  id: (i) => `credential-library-id-${i}`,
+  id: () => generateId('cl_'),
   type: (i) => types[i % types.length],
 
   authorized_actions: () =>
diff --git a/addons/api/mirage/factories/credential-store.js b/addons/api/mirage/factories/credential-store.js
index e84c494ca..0858d8e48 100644
--- a/addons/api/mirage/factories/credential-store.js
+++ b/addons/api/mirage/factories/credential-store.js
@@ -2,6 +2,7 @@ import factory from '../generated/factories/credential-store';
 import { random, internet, datatype } from 'faker';
 import { trait } from 'ember-cli-mirage';
 import permissions from '../helpers/permissions';
+import generateId from '../helpers/id';
 
 const types = ['vault'];
 
@@ -18,7 +19,7 @@ export default factory.extend({
       'credential-libraries': ['create', 'list'],
     };
   },
-  id: (i) => `credential-store-id-${i}`,
+  id: () => generateId('cs_'),
   type: (i) => types[i % types.length],
 
   attributes() {
diff --git a/addons/api/mirage/factories/group.js b/addons/api/mirage/factories/group.js
index 6a16d3fb0..b3de1ac9c 100644
--- a/addons/api/mirage/factories/group.js
+++ b/addons/api/mirage/factories/group.js
@@ -1,6 +1,7 @@
 import factory from '../generated/factories/group';
 import { trait } from 'ember-cli-mirage';
 import permissions from '../helpers/permissions';
+import generateId from '../helpers/id';
 
 export default factory.extend({
   authorized_actions: () =>
@@ -12,7 +13,8 @@ export default factory.extend({
       'add-members',
       'remove-members',
     ],
-  id: (i) => `group-${i}`,
+
+  id: () => generateId('g_'),
 
   /**
    * Generates some users for the same scope and assigns them to the group
diff --git a/addons/api/mirage/factories/host-catalog.js b/addons/api/mirage/factories/host-catalog.js
index 0cf046228..207c06d37 100644
--- a/addons/api/mirage/factories/host-catalog.js
+++ b/addons/api/mirage/factories/host-catalog.js
@@ -2,6 +2,7 @@ import factory from '../generated/factories/host-catalog';
 import { trait } from 'ember-cli-mirage';
 import permissions from '../helpers/permissions';
 import { datatype, address, random } from 'faker';
+import generateId from '../helpers/id';
 
 const types = ['static', 'plugin'];
 // Represents known plugin types, except "foobar" which models the possibility
@@ -11,7 +12,7 @@ const pluginTypes = ['aws', 'azure', 'foobar'];
 let pluginTypeCounter = 1;
 
 export default factory.extend({
-  id: (i) => `host-catalog-id-${i}`,
+  id: () => generateId('hc_'),
 
   // Cycle through available types
   type: (i) => types[i % types.length],
diff --git a/addons/api/mirage/factories/host-set.js b/addons/api/mirage/factories/host-set.js
index c417c067c..43b99e35b 100644
--- a/addons/api/mirage/factories/host-set.js
+++ b/addons/api/mirage/factories/host-set.js
@@ -1,9 +1,10 @@
 import factory from '../generated/factories/host-set';
 import permissions from '../helpers/permissions';
 import { datatype, internet, database } from 'faker';
+import generateId from '../helpers/id';
 
 export default factory.extend({
-  id: (i) => `host-set-id-${i}`,
+  id: () => generateId('hs_'),
   type() {
     return this.hostCatalog?.type || factory.attrs.type;
   },
diff --git a/addons/api/mirage/factories/host.js b/addons/api/mirage/factories/host.js
index 3bf07f11a..79bcad1e5 100644
--- a/addons/api/mirage/factories/host.js
+++ b/addons/api/mirage/factories/host.js
@@ -1,9 +1,11 @@
 import factory from '../generated/factories/host';
 import permissions from '../helpers/permissions';
 import { internet, datatype } from 'faker';
+import generateId from '../helpers/id';
 
 export default factory.extend({
-  id: (i) => `host-id-${i}`,
+  id: () => generateId('h_'),
+
   type() {
     return this.hostCatalog?.type || factory.attrs.type;
   },
diff --git a/addons/api/mirage/factories/managed-group.js b/addons/api/mirage/factories/managed-group.js
index 9460f847f..b43b2b68d 100644
--- a/addons/api/mirage/factories/managed-group.js
+++ b/addons/api/mirage/factories/managed-group.js
@@ -1,11 +1,11 @@
 import factory from '../generated/factories/managed-group';
 import { random } from 'faker';
 import permissions from '../helpers/permissions';
+import generateId from '../helpers/id';
 
 const types = ['oidc'];
 
 export default factory.extend({
-  id: (i) => `managed-groups-id-${i}`,
   type: (i) => types[i % types.length],
 
   authorized_actions: () =>
@@ -16,6 +16,8 @@ export default factory.extend({
       'delete',
     ],
 
+  id: () => generateId('mg_'),
+
   attributes() {
     switch (this.type) {
       case 'oidc':
diff --git a/addons/api/mirage/factories/role.js b/addons/api/mirage/factories/role.js
index be13712b8..841558fde 100644
--- a/addons/api/mirage/factories/role.js
+++ b/addons/api/mirage/factories/role.js
@@ -1,6 +1,7 @@
 import factory from '../generated/factories/role';
 import { trait } from 'ember-cli-mirage';
 import permissions from '../helpers/permissions';
+import generateId from '../helpers/id';
 
 export default factory.extend({
   authorized_actions: () =>
@@ -19,6 +20,8 @@ export default factory.extend({
     'id=*;type=host-catalog;actions=create,read',
   ],
 
+  id: () => generateId('r_'),
+
   /**
    * Adds principals to the role.
    */
diff --git a/addons/api/mirage/factories/scope.js b/addons/api/mirage/factories/scope.js
index b631c00e0..c70e6dbf1 100644
--- a/addons/api/mirage/factories/scope.js
+++ b/addons/api/mirage/factories/scope.js
@@ -1,6 +1,7 @@
 import factory from '../generated/factories/scope';
 import { trait } from 'ember-cli-mirage';
 import permissions from '../helpers/permissions';
+import generateId from '../helpers/id';
 
 export default factory.extend({
   type: 'global',
@@ -27,15 +28,7 @@ export default factory.extend({
     };
   },
 
-  /**
-   * Generates realistic-ish IDs while still being deterministic.
-   */
-  id(i) {
-    let id = 'tv6fv3yz8p';
-    if (i % 3) id = 'xk1i4dk50v';
-    if (i % 2) id = 's9n819zgko';
-    return `s_${id}${i}`;
-  },
+  id: () => generateId('s_'),
 
   withChildren: trait({
     afterCreate(record, server) {
diff --git a/addons/api/mirage/factories/session.js b/addons/api/mirage/factories/session.js
index a581fa9e4..f73895473 100644
--- a/addons/api/mirage/factories/session.js
+++ b/addons/api/mirage/factories/session.js
@@ -1,13 +1,15 @@
 import factory from '../generated/factories/session';
 import { trait } from 'ember-cli-mirage';
 import { random } from 'faker';
+import generateId from '../helpers/id';
 
 const statusStrings = ['pending', 'active', 'canceling', 'terminated'];
 
 export const pickRandomStatusString = () => random.arrayElement(statusStrings);
 
 export default factory.extend({
-  id: (i) => `session-id-${i}`,
+  id: () => generateId('ss_'),
+
   status: pickRandomStatusString,
 
   /**
diff --git a/addons/api/mirage/factories/target.js b/addons/api/mirage/factories/target.js
index 3e3cb17df..64248f999 100644
--- a/addons/api/mirage/factories/target.js
+++ b/addons/api/mirage/factories/target.js
@@ -2,6 +2,7 @@ import factory from '../generated/factories/target';
 import { trait } from 'ember-cli-mirage';
 import { random, datatype } from 'faker';
 import permissions from '../helpers/permissions';
+import generateId from '../helpers/id';
 
 const randomBoolean = (chance = 0.5) => Math.random() < chance;
 const hostSetChance = 0.3;
@@ -21,6 +22,8 @@ export default factory.extend({
       'remove-credential-sources',
     ],
 
+  id: () => generateId('t_'),
+
   /**
    * -1 means "unlimited" and we want to generate these on occasion.
    */
diff --git a/addons/api/mirage/factories/user.js b/addons/api/mirage/factories/user.js
index 837adba44..dd577dd72 100644
--- a/addons/api/mirage/factories/user.js
+++ b/addons/api/mirage/factories/user.js
@@ -1,5 +1,6 @@
 import factory from '../generated/factories/user';
 import permissions from '../helpers/permissions';
+import generateId from '../helpers/id';
 
 export default factory.extend({
   authorized_actions: () =>
@@ -11,5 +12,5 @@ export default factory.extend({
       'add-accounts',
       'remove-accounts',
     ],
-  id: (i) => `user-${i}`,
+  id: () => generateId('u_'),
 });
diff --git a/addons/api/mirage/helpers/id.js b/addons/api/mirage/helpers/id.js
new file mode 100644
index 000000000..b8ee469db
--- /dev/null
+++ b/addons/api/mirage/helpers/id.js
@@ -0,0 +1,41 @@
+const characters = 'abcdefghijklmnopqrstuvwxyz0123456789';
+
+/**
+ * The Mulberry32 PRNG, JavaScript implementation.  This is a seedable PRNG,
+ * which we need in order to deterministically generate IDs which are stable
+ * across reloads.  Unfortunately, the built-in `Math.random` function
+ * is not seedable.
+ *
+ * Source:
+ * https://github.com/bryc/code/blob/master/jshash/PRNGs.md#mulberry32
+ *
+ * @param {number} a
+ * @return {number}
+ */
+function mulberry32(a = 0) {
+  return function () {
+    a += 0x6d2b79f5 | 0;
+    var t = Math.imul(a ^ (a >>> 15), 1 | a);
+    t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;
+    return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
+  };
+}
+
+const random = mulberry32();
+
+/**
+ * Generates a random ID string at least 10 characters long with the
+ * specified prefix.
+ *
+ * @param {string} prefix
+ * @return {string}
+ */
+export default function (prefix = '') {
+  let result = '';
+  for (let i = 0; i < 10; i++) {
+    result = result.concat(
+      characters[Math.floor(random() * characters.length)]
+    );
+  }
+  return prefix.concat(result);
+}