diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/interfaces/api/inbox/InboxControllerImpl.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/interfaces/api/inbox/InboxControllerImpl.kt
index 04f1d6f3..fc8acf7f 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/interfaces/api/inbox/InboxControllerImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/interfaces/api/inbox/InboxControllerImpl.kt
@@ -1,16 +1,28 @@
 package dev.usbharu.hideout.activitypub.interfaces.api.inbox
 
 import dev.usbharu.hideout.activitypub.service.common.APService
+import dev.usbharu.httpsignature.common.HttpHeaders
+import dev.usbharu.httpsignature.common.HttpMethod
+import dev.usbharu.httpsignature.common.HttpRequest
 import org.slf4j.LoggerFactory
 import org.springframework.http.HttpStatus
 import org.springframework.http.ResponseEntity
 import org.springframework.web.bind.annotation.RequestBody
 import org.springframework.web.bind.annotation.RestController
+import org.springframework.web.context.request.RequestContextHolder
+import org.springframework.web.context.request.ServletRequestAttributes
+import java.net.URL
+
 
 @RestController
 class InboxControllerImpl(private val apService: APService) : InboxController {
     @Suppress("TooGenericExceptionCaught")
-    override suspend fun inbox(@RequestBody string: String): ResponseEntity<Unit> {
+    override suspend fun inbox(
+        @RequestBody string: String
+    ): ResponseEntity<Unit> {
+
+        val request = (requireNotNull(RequestContextHolder.getRequestAttributes()) as ServletRequestAttributes).request
+
         val parseActivity = try {
             apService.parseActivity(string)
         } catch (e: Exception) {
@@ -19,7 +31,29 @@ class InboxControllerImpl(private val apService: APService) : InboxController {
         }
         LOGGER.info("INBOX Processing Activity Type: {}", parseActivity)
         try {
-            apService.processActivity(string, parseActivity)
+            val url = request.requestURL.toString()
+
+            val headersList = request.headerNames?.toList().orEmpty()
+            val headers =
+                headersList.associateWith { header -> request.getHeaders(header)?.toList().orEmpty() }
+
+            val method = when (val method = request.method.lowercase()) {
+                "get" -> HttpMethod.GET
+                "post" -> HttpMethod.POST
+                else -> {
+                    throw IllegalArgumentException("Unsupported method: $method")
+                }
+            }
+
+            println(headers)
+
+            apService.processActivity(
+                string, parseActivity, HttpRequest(
+                    URL(url + request.queryString.orEmpty()),
+                    HttpHeaders(headers),
+                    method
+                ), headers
+            )
         } catch (e: Exception) {
             LOGGER.warn("FAILED Process Activity $parseActivity", e)
             return ResponseEntity(HttpStatus.ACCEPTED)
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/common/APService.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/common/APService.kt
index 2db01861..e6e10495 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/common/APService.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/common/APService.kt
@@ -7,6 +7,7 @@ import dev.usbharu.hideout.activitypub.interfaces.api.common.ActivityPubResponse
 import dev.usbharu.hideout.activitypub.interfaces.api.common.ActivityPubStringResponse
 import dev.usbharu.hideout.core.external.job.InboxJob
 import dev.usbharu.hideout.core.service.job.JobQueueParentService
+import dev.usbharu.httpsignature.common.HttpRequest
 import org.slf4j.Logger
 import org.slf4j.LoggerFactory
 import org.springframework.beans.factory.annotation.Qualifier
@@ -15,7 +16,12 @@ import org.springframework.stereotype.Service
 interface APService {
     fun parseActivity(json: String): ActivityType
 
-    suspend fun processActivity(json: String, type: ActivityType): ActivityPubResponse?
+    suspend fun processActivity(
+        json: String,
+        type: ActivityType,
+        httpRequest: HttpRequest,
+        map: Map<String, List<String>>
+    ): ActivityPubResponse?
 }
 
 enum class ActivityType {
@@ -215,11 +221,20 @@ class APServiceImpl(
     }
 
     @Suppress("CyclomaticComplexMethod", "NotImplementedDeclaration")
-    override suspend fun processActivity(json: String, type: ActivityType): ActivityPubResponse {
+    override suspend fun processActivity(
+        json: String,
+        type: ActivityType,
+        httpRequest: HttpRequest,
+        map: Map<String, List<String>>
+    ): ActivityPubResponse {
         logger.debug("process activity: {}", type)
         jobQueueParentService.schedule(InboxJob) {
             props[it.json] = json
             props[it.type] = type.name
+            val writeValueAsString = objectMapper.writeValueAsString(httpRequest)
+            println(writeValueAsString)
+            props[it.httpRequest] = writeValueAsString
+            props[it.headers] = objectMapper.writeValueAsString(map)
         }
         return ActivityPubStringResponse(message = "")
     }
diff --git a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/common/ApJobServiceImpl.kt b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/common/ApJobServiceImpl.kt
index 13d23f57..0020fbd0 100644
--- a/src/main/kotlin/dev/usbharu/hideout/activitypub/service/common/ApJobServiceImpl.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/activitypub/service/common/ApJobServiceImpl.kt
@@ -12,8 +12,17 @@ import dev.usbharu.hideout.activitypub.service.activity.like.APLikeServiceImpl
 import dev.usbharu.hideout.activitypub.service.activity.like.ApReactionJobService
 import dev.usbharu.hideout.activitypub.service.activity.undo.APUndoServiceImpl
 import dev.usbharu.hideout.activitypub.service.objects.note.ApNoteJobService
+import dev.usbharu.hideout.activitypub.service.objects.user.APUserService
+import dev.usbharu.hideout.application.external.Transaction
+import dev.usbharu.hideout.core.domain.exception.FailedToGetResourcesException
 import dev.usbharu.hideout.core.external.job.*
-
+import dev.usbharu.hideout.core.query.UserQueryService
+import dev.usbharu.hideout.util.RsaUtil
+import dev.usbharu.httpsignature.common.HttpHeaders
+import dev.usbharu.httpsignature.common.HttpRequest
+import dev.usbharu.httpsignature.common.PublicKey
+import dev.usbharu.httpsignature.verify.DefaultSignatureHeaderParser
+import dev.usbharu.httpsignature.verify.RsaSha256HttpSignatureVerifier
 import kjob.core.dsl.JobContextWithProps
 import kjob.core.job.JobProps
 import org.slf4j.LoggerFactory
@@ -31,7 +40,12 @@ class ApJobServiceImpl(
     private val APLikeServiceImpl: APLikeServiceImpl,
     private val APUndoServiceImpl: APUndoServiceImpl,
     private val APReceiveDeleteServiceImpl: APReceiveDeleteServiceImpl,
-    @Qualifier("activitypub") private val objectMapper: ObjectMapper
+    @Qualifier("activitypub") private val objectMapper: ObjectMapper,
+    private val httpSignatureVerifier: RsaSha256HttpSignatureVerifier,
+    private val signatureHeaderParser: DefaultSignatureHeaderParser,
+    private val apUserService: APUserService,
+    private val userQueryService: UserQueryService,
+    private val transaction: Transaction
 ) : ApJobService {
     @Suppress("REDUNDANT_ELSE_IN_WHEN")
     override suspend fun <T : HideoutJob> processActivity(job: JobContextWithProps<T>, hideoutJob: HideoutJob) {
@@ -41,6 +55,29 @@ class ApJobServiceImpl(
         // Springで作成されるプロキシの都合上パターンマッチングが壊れるので必須
         when (hideoutJob) {
             is InboxJob -> {
+                val httpRequestString = (job.props as JobProps<InboxJob>)[InboxJob.httpRequest]
+                println(httpRequestString)
+                val headerString = (job.props as JobProps<InboxJob>)[InboxJob.headers]
+
+                val readValue = objectMapper.readValue<Map<String, List<String>>>(headerString)
+
+                val httpRequest =
+                    objectMapper.readValue<HttpRequest>(httpRequestString).copy(headers = HttpHeaders(readValue))
+                val signature = signatureHeaderParser.parse(httpRequest.headers)
+
+                val publicKey = transaction.transaction {
+                    try {
+                        userQueryService.findByKeyId(signature.keyId)
+                    } catch (e: FailedToGetResourcesException) {
+                        apUserService.fetchPersonWithEntity(signature.keyId).second
+                    }.publicKey
+                }
+
+                httpSignatureVerifier.verify(
+                    httpRequest,
+                    PublicKey(RsaUtil.decodeRsaPublicKeyPem(publicKey), signature.keyId)
+                )
+
                 val typeString = (job.props as JobProps<InboxJob>)[InboxJob.type]
                 val json = (job.props as JobProps<InboxJob>)[InboxJob.json]
                 val type = ActivityType.valueOf(typeString)
@@ -60,6 +97,7 @@ class ApJobServiceImpl(
                     }
                 }
             }
+
             is ReceiveFollowJob -> {
                 apReceiveFollowJobService.receiveFollowJob(
                     job.props as JobProps<ReceiveFollowJob>
diff --git a/src/main/kotlin/dev/usbharu/hideout/application/config/HttpSignatureConfig.kt b/src/main/kotlin/dev/usbharu/hideout/application/config/HttpSignatureConfig.kt
new file mode 100644
index 00000000..ee3bc409
--- /dev/null
+++ b/src/main/kotlin/dev/usbharu/hideout/application/config/HttpSignatureConfig.kt
@@ -0,0 +1,20 @@
+package dev.usbharu.hideout.application.config
+
+import dev.usbharu.httpsignature.sign.RsaSha256HttpSignatureSigner
+import dev.usbharu.httpsignature.verify.DefaultSignatureHeaderParser
+import dev.usbharu.httpsignature.verify.RsaSha256HttpSignatureVerifier
+import dev.usbharu.httpsignature.verify.SignatureHeaderParser
+import org.springframework.context.annotation.Bean
+import org.springframework.context.annotation.Configuration
+
+@Configuration
+class HttpSignatureConfig {
+    @Bean
+    fun defaultSignatureHeaderParser(): DefaultSignatureHeaderParser = DefaultSignatureHeaderParser()
+
+    @Bean
+    fun rsaSha256HttpSignatureVerifier(
+        signatureHeaderParser: SignatureHeaderParser,
+        signatureSigner: RsaSha256HttpSignatureSigner
+    ): RsaSha256HttpSignatureVerifier = RsaSha256HttpSignatureVerifier(signatureHeaderParser, signatureSigner)
+}
diff --git a/src/main/kotlin/dev/usbharu/hideout/core/external/job/HideoutJob.kt b/src/main/kotlin/dev/usbharu/hideout/core/external/job/HideoutJob.kt
index 94fa81da..238b809f 100644
--- a/src/main/kotlin/dev/usbharu/hideout/core/external/job/HideoutJob.kt
+++ b/src/main/kotlin/dev/usbharu/hideout/core/external/job/HideoutJob.kt
@@ -41,4 +41,6 @@ object DeliverRemoveReactionJob : HideoutJob("DeliverRemoveReactionJob") {
 object InboxJob : HideoutJob("InboxJob") {
     val json = string("json")
     val type = string("type")
+    val httpRequest = string("http_request")
+    val headers = string("headers")
 }