diff --git a/crypto/signedPayload.ts b/crypto/signedPayload.ts
index 52aee39..5eed005 100644
--- a/crypto/signedPayload.ts
+++ b/crypto/signedPayload.ts
@@ -1,12 +1,26 @@
-export type BlahPayloadSignee<P> = {
-  nonce: number;
-  payload: P;
-  timestamp: number;
-  id_key: string;
-  act_key?: string;
-};
+import z from "zod";
 
-export type BlahSignedPayload<P> = {
-  sig: string;
-  signee: BlahPayloadSignee<P>;
-};
+export function blahPayloadSigneeSchemaOf<P extends z.ZodTypeAny>(schema: P) {
+  return z.object({
+    nonce: z.number().int(),
+    payload: schema,
+    timestamp: z.number().int(),
+    id_key: z.string(),
+    act_key: z.string().optional(),
+  });
+}
+
+export function blahSignedPayloadSchemaOf<P extends z.ZodTypeAny>(schema: P) {
+  return z.object({
+    sig: z.string(),
+    signee: blahPayloadSigneeSchemaOf(schema),
+  });
+}
+
+export type BlahPayloadSignee<P extends z.ZodTypeAny> = z.infer<
+  ReturnType<typeof blahPayloadSigneeSchemaOf<P>>
+>;
+
+export type BlahSignedPayload<P extends z.ZodTypeAny> = z.infer<
+  ReturnType<typeof blahSignedPayloadSchemaOf<P>>
+>;
diff --git a/deno.json b/deno.json
index 733352f..cd0ecad 100644
--- a/deno.json
+++ b/deno.json
@@ -1,6 +1,7 @@
 {
   "imports": {
     "@deno/dnt": "jsr:@deno/dnt@^0.41.3",
-    "@std/expect": "jsr:@std/expect@^1.0.3"
+    "@std/expect": "jsr:@std/expect@^1.0.3",
+    "zod": "https://deno.land/x/zod@v3.23.8/mod.ts"
   }
 }
diff --git a/deno.lock b/deno.lock
index a185b98..b4009a9 100644
--- a/deno.lock
+++ b/deno.lock
@@ -140,7 +140,21 @@
       }
     }
   },
-  "remote": {},
+  "remote": {
+    "https://deno.land/x/zod@v3.23.8/ZodError.ts": "528da200fbe995157b9ae91498b103c4ef482217a5c086249507ac850bd78f52",
+    "https://deno.land/x/zod@v3.23.8/errors.ts": "5285922d2be9700cc0c70c95e4858952b07ae193aa0224be3cbd5cd5567eabef",
+    "https://deno.land/x/zod@v3.23.8/external.ts": "a6cfbd61e9e097d5f42f8a7ed6f92f93f51ff927d29c9fbaec04f03cbce130fe",
+    "https://deno.land/x/zod@v3.23.8/helpers/enumUtil.ts": "54efc393cc9860e687d8b81ff52e980def00fa67377ad0bf8b3104f8a5bf698c",
+    "https://deno.land/x/zod@v3.23.8/helpers/errorUtil.ts": "7a77328240be7b847af6de9189963bd9f79cab32bbc61502a9db4fe6683e2ea7",
+    "https://deno.land/x/zod@v3.23.8/helpers/parseUtil.ts": "c14814d167cc286972b6e094df88d7d982572a08424b7cd50f862036b6fcaa77",
+    "https://deno.land/x/zod@v3.23.8/helpers/partialUtil.ts": "998c2fe79795257d4d1cf10361e74492f3b7d852f61057c7c08ac0a46488b7e7",
+    "https://deno.land/x/zod@v3.23.8/helpers/typeAliases.ts": "0fda31a063c6736fc3cf9090dd94865c811dfff4f3cb8707b932bf937c6f2c3e",
+    "https://deno.land/x/zod@v3.23.8/helpers/util.ts": "30c273131661ca5dc973f2cfb196fa23caf3a43e224cdde7a683b72e101a31fc",
+    "https://deno.land/x/zod@v3.23.8/index.ts": "d27aabd973613985574bc31f39e45cb5d856aa122ef094a9f38a463b8ef1a268",
+    "https://deno.land/x/zod@v3.23.8/locales/en.ts": "a7a25cd23563ccb5e0eed214d9b31846305ddbcdb9c5c8f508b108943366ab4c",
+    "https://deno.land/x/zod@v3.23.8/mod.ts": "ec6e2b1255c1a350b80188f97bd0a6bac45801bb46fc48f50b9763aa66046039",
+    "https://deno.land/x/zod@v3.23.8/types.ts": "1b172c90782b1eaa837100ebb6abd726d79d6c1ec336350c8e851e0fd706bf5c"
+  },
   "workspace": {
     "dependencies": [
       "jsr:@deno/dnt@^0.41.3",
diff --git a/identity/actKey.ts b/identity/actKey.ts
new file mode 100644
index 0000000..18a4753
--- /dev/null
+++ b/identity/actKey.ts
@@ -0,0 +1,11 @@
+import z from "zod";
+
+export const blahActKeyRecordSchema = z.object({
+  typ: z.literal("use_act_key"),
+  act_key: z.string(),
+  expire_time: z.number().int(),
+  comment: z.string(),
+});
+
+export type BlahActKeyRecord = z.input<typeof blahActKeyRecordSchema>;
+export type BlahParsedActKeyRecord = z.infer<typeof blahActKeyRecordSchema>;
diff --git a/identity/identityFile.ts b/identity/identityFile.ts
new file mode 100644
index 0000000..cec2f2c
--- /dev/null
+++ b/identity/identityFile.ts
@@ -0,0 +1,13 @@
+import { z } from "zod";
+import { blahSignedPayloadSchemaOf } from "../crypto/mod.ts";
+import { blahActKeyRecordSchema } from "./actKey.ts";
+import { blahProfileSchema } from "./profile.ts";
+
+export const blahIdentityFileSchema = z.object({
+  id_key: z.string(),
+  act_keys: z.array(blahSignedPayloadSchemaOf(blahActKeyRecordSchema)),
+  profile: blahSignedPayloadSchemaOf(blahProfileSchema),
+});
+
+export type BlahIdentityFile = z.input<typeof blahIdentityFileSchema>;
+export type BlahParsedIdentityFile = z.infer<typeof blahIdentityFileSchema>;
diff --git a/identity/profile.ts b/identity/profile.ts
new file mode 100644
index 0000000..b814378
--- /dev/null
+++ b/identity/profile.ts
@@ -0,0 +1,12 @@
+import z from "zod";
+
+export const blahProfileSchema = z.object({
+  typ: z.literal("profile"),
+  preferred_chat_server_urls: z.array(z.string().url()),
+  id_urls: z.array(z.string().url()),
+  name: z.string(),
+  bio: z.string().optional(),
+});
+
+export type BlahProfile = z.input<typeof blahProfileSchema>;
+export type BlahParsedProfile = z.infer<typeof blahProfileSchema>;