diff --git a/src/main/resources/update/gitbucket-core_4.31.xml b/src/main/resources/update/gitbucket-core_4.31.xml
new file mode 100644
index 0000000..dcde9af
--- /dev/null
+++ b/src/main/resources/update/gitbucket-core_4.31.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<changeSet>
+  <!--================================================================================================-->
+  <!-- SSH_KEY -->
+  <!--================================================================================================-->
+  <createTable tableName="GPG_KEY">
+    <column name="USER_NAME" type="varchar(100)" nullable="false"/>
+    <column name="KEY_ID" type="int" nullable="false" autoIncrement="true" unique="true"/>
+    <column name="GPG_KEY_ID" type="bigint" nullable="false"/>
+    <column name="TITLE" type="varchar(100)" nullable="false"/>
+    <column name="PUBLIC_KEY" type="text" nullable="false"/>
+  </createTable>
+
+  <addPrimaryKey constraintName="IDX_GPG_KEY_PK" tableName="GPG_KEY" columnNames="USER_NAME, GPG_KEY_ID"/>
+  <addForeignKeyConstraint constraintName="IDX_GPG_KEY_FK0" baseTableName="GPG_KEY" baseColumnNames="USER_NAME" referencedTableName="ACCOUNT" referencedColumnNames="USER_NAME"/>
+</changeSet>
diff --git a/src/main/scala/gitbucket/core/GitBucketCoreModule.scala b/src/main/scala/gitbucket/core/GitBucketCoreModule.scala
index d88cdea..83d519a 100644
--- a/src/main/scala/gitbucket/core/GitBucketCoreModule.scala
+++ b/src/main/scala/gitbucket/core/GitBucketCoreModule.scala
@@ -60,5 +60,6 @@
       new Version("4.28.0"),
       new Version("4.29.0"),
       new Version("4.30.0"),
-      new Version("4.30.1")
+      new Version("4.30.1"),
+      new Version("4.31.0", new LiquibaseMigration("update/gitbucket-core_4.31.xml"))
     )
diff --git a/src/main/scala/gitbucket/core/controller/AccountController.scala b/src/main/scala/gitbucket/core/controller/AccountController.scala
index 005aa8a..da07cde 100644
--- a/src/main/scala/gitbucket/core/controller/AccountController.scala
+++ b/src/main/scala/gitbucket/core/controller/AccountController.scala
@@ -26,6 +26,7 @@
     with WikiService
     with LabelsService
     with SshKeyService
+    with GpgKeyService
     with OneselfAuthenticator
     with UsersAuthenticator
     with GroupManagerAuthenticator
@@ -42,6 +43,7 @@
     with WikiService
     with LabelsService
     with SshKeyService
+    with GpgKeyService
     with OneselfAuthenticator
     with UsersAuthenticator
     with GroupManagerAuthenticator
@@ -75,6 +77,8 @@
 
   case class SshKeyForm(title: String, publicKey: String)
 
+  case class GpgKeyForm(title: String, publicKey: String)
+
   case class PersonalTokenForm(note: String)
 
   val newForm = mapping(
@@ -108,6 +112,11 @@
     "publicKey" -> trim2(label("Key", text(required, validPublicKey)))
   )(SshKeyForm.apply)
 
+  val gpgKeyForm = mapping(
+    "title" -> trim(label("Title", text(required, maxlength(100)))),
+    "publicKey" -> label("Key", text(required, validGpgPublicKey))
+  )(GpgKeyForm.apply)
+
   val personalTokenForm = mapping(
     "note" -> trim(label("Token", text(required, maxlength(100))))
   )(PersonalTokenForm.apply)
@@ -387,6 +396,27 @@
     redirect(s"/${userName}/_ssh")
   })
 
+  get("/:userName/_gpg")(oneselfOnly {
+    val userName = params("userName")
+    getAccountByUserName(userName).map { x =>
+      //html.ssh(x, getPublicKeys(x.userName))
+      html.gpg(x, getGpgPublicKeys(x.userName))
+    } getOrElse NotFound()
+  })
+
+  post("/:userName/_gpg", gpgKeyForm)(oneselfOnly { form =>
+    val userName = params("userName")
+    addGpgPublicKey(userName, form.title, form.publicKey)
+    redirect(s"/${userName}/_gpg")
+  })
+
+  get("/:userName/_gpg/delete/:id")(oneselfOnly {
+    val userName = params("userName")
+    val keyId = params("id").toInt
+    deleteGpgPublicKey(userName, keyId)
+    redirect(s"/${userName}/_gpg")
+  })
+
   get("/:userName/_application")(oneselfOnly {
     val userName = params("userName")
     getAccountByUserName(userName).map { x =>
@@ -771,6 +801,20 @@
       }
   }
 
+  private def validGpgPublicKey: Constraint = new Constraint() {
+    override def validate(name: String, value: String, messages: Messages): Option[String] = {
+      GpgUtil.str2GpgKeyId(value) match {
+        case Some(s) if GpgUtil.getGpgKey(s).isEmpty =>
+          None
+        case Some(_) =>
+          Some("GPG key is duplicated.")
+        case None =>
+          Some("GPG key is invalid.")
+      }
+    }
+
+  }
+
   private def validAccountName: Constraint = new Constraint() {
     override def validate(name: String, value: String, messages: Messages): Option[String] = {
       getAccountByUserName(value) match {
diff --git a/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala b/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
index d81a026..7ae412e 100644
--- a/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
+++ b/src/main/scala/gitbucket/core/controller/RepositoryViewerController.scala
@@ -14,6 +14,7 @@
 import gitbucket.core.util.Implicits._
 import gitbucket.core.util.Directory._
 import gitbucket.core.model.{Account, CommitState, CommitStatus}
+import gitbucket.core.util.JGitUtil.CommitInfo
 import gitbucket.core.view
 import gitbucket.core.view.helpers
 import org.apache.commons.compress.archivers.{ArchiveEntry, ArchiveOutputStream}
@@ -273,9 +274,30 @@
               if (path.isEmpty) Nil else path.split("/").toList,
               branchName,
               repository,
-              logs.splitWith { (commit1, commit2) =>
-                view.helpers.date(commit1.commitTime) == view.helpers.date(commit2.commitTime)
-              },
+              logs
+                .map {
+                  c =>
+                    CommitInfo(
+                      id = c.id,
+                      shortMessage = c.shortMessage,
+                      fullMessage = c.fullMessage,
+                      parents = c.parents,
+                      authorTime = c.authorTime,
+                      authorName = c.authorName,
+                      authorEmailAddress = c.authorEmailAddress,
+                      commitTime = c.commitTime,
+                      committerName = c.committerName,
+                      committerEmailAddress = c.committerEmailAddress,
+                      commitSign = c.commitSign,
+                      verified = c.commitSign
+                        .flatMap { s =>
+                          GpgUtil.verifySign(s)
+                        }
+                    )
+                }
+                .splitWith { (commit1, commit2) =>
+                  view.helpers.date(commit1.commitTime) == view.helpers.date(commit2.commitTime)
+                },
               page,
               hasNext,
               hasDeveloperRole(repository.owner, repository.name, context.loginAccount),
diff --git a/src/main/scala/gitbucket/core/model/GpgKey.scala b/src/main/scala/gitbucket/core/model/GpgKey.scala
new file mode 100644
index 0000000..d4859f0
--- /dev/null
+++ b/src/main/scala/gitbucket/core/model/GpgKey.scala
@@ -0,0 +1,29 @@
+package gitbucket.core.model
+
+trait GpgKeyComponent { self: Profile =>
+  import profile.api._
+
+  lazy val GpgKeys = TableQuery[GpgKeys]
+
+  class GpgKeys(tag: Tag) extends Table[GpgKey](tag, "GPG_KEY") {
+    val userName = column[String]("USER_NAME")
+    val keyId = column[Int]("KEY_ID", O AutoInc)
+    val gpgKeyId = column[Long]("GPG_KEY_ID")
+    val title = column[String]("TITLE")
+    val publicKey = column[String]("PUBLIC_KEY")
+    def * = (userName, keyId, gpgKeyId, title, publicKey) <> (GpgKey.tupled, GpgKey.unapply)
+
+    def byPrimaryKey(userName: String, keyId: Int) =
+      (this.userName === userName.bind) && (this.keyId === keyId.bind)
+    def byGpgKeyId(gpgKeyId: Long) =
+      this.gpgKeyId === gpgKeyId.bind
+  }
+}
+
+case class GpgKey(
+  userName: String,
+  keyId: Int = 0,
+  gpgKeyId: Long,
+  title: String,
+  publicKey: String
+)
diff --git a/src/main/scala/gitbucket/core/model/Profile.scala b/src/main/scala/gitbucket/core/model/Profile.scala
index 577c3ee..ce1f96b 100644
--- a/src/main/scala/gitbucket/core/model/Profile.scala
+++ b/src/main/scala/gitbucket/core/model/Profile.scala
@@ -59,6 +59,7 @@
     with PullRequestComponent
     with RepositoryComponent
     with SshKeyComponent
+    with GpgKeyComponent
     with RepositoryWebHookComponent
     with RepositoryWebHookEventComponent
     with AccountWebHookComponent
diff --git a/src/main/scala/gitbucket/core/service/GpgKeyService.scala b/src/main/scala/gitbucket/core/service/GpgKeyService.scala
new file mode 100644
index 0000000..3e10b93
--- /dev/null
+++ b/src/main/scala/gitbucket/core/service/GpgKeyService.scala
@@ -0,0 +1,29 @@
+package gitbucket.core.service
+
+import java.io.ByteArrayInputStream
+
+import gitbucket.core.model.GpgKey
+
+import collection.JavaConverters._
+import gitbucket.core.model.Profile._
+import gitbucket.core.model.Profile.profile.blockingApi._
+import org.bouncycastle.bcpg.ArmoredInputStream
+import org.bouncycastle.openpgp.PGPPublicKeyRing
+import org.bouncycastle.openpgp.bc.BcPGPObjectFactory
+
+trait GpgKeyService {
+  def getGpgPublicKeys(userName: String)(implicit s: Session): List[GpgKey] =
+    GpgKeys.filter(_.userName === userName.bind).sortBy(_.gpgKeyId).list
+
+  def addGpgPublicKey(userName: String, title: String, publicKey: String)(implicit s: Session): Unit = {
+    val pubKeyOf = new BcPGPObjectFactory(new ArmoredInputStream(new ByteArrayInputStream(publicKey.getBytes)))
+    pubKeyOf.iterator().asScala.foreach {
+      case keyRing: PGPPublicKeyRing =>
+        val key = keyRing.getPublicKey()
+        GpgKeys.insert(GpgKey(userName = userName, gpgKeyId = key.getKeyID, title = title, publicKey = publicKey))
+    }
+  }
+
+  def deleteGpgPublicKey(userName: String, keyId: Int)(implicit s: Session): Unit =
+    GpgKeys.filter(_.byPrimaryKey(userName, keyId)).delete
+}
diff --git a/src/main/scala/gitbucket/core/util/GpgUtil.scala b/src/main/scala/gitbucket/core/util/GpgUtil.scala
new file mode 100644
index 0000000..5d5edb4
--- /dev/null
+++ b/src/main/scala/gitbucket/core/util/GpgUtil.scala
@@ -0,0 +1,61 @@
+package gitbucket.core.util
+import java.io.ByteArrayInputStream
+
+import collection.JavaConverters._
+import gitbucket.core.model.Profile._
+import gitbucket.core.model.Profile.profile.blockingApi._
+import org.bouncycastle.bcpg.ArmoredInputStream
+import org.bouncycastle.openpgp.{PGPPublicKey, PGPPublicKeyRing, PGPSignatureList}
+import org.bouncycastle.openpgp.bc.BcPGPObjectFactory
+import org.bouncycastle.openpgp.operator.bc.BcPGPContentVerifierBuilderProvider
+
+object GpgUtil {
+  def str2GpgKeyId(keyStr: String): Option[Long] = {
+    val pubKeyOf = new BcPGPObjectFactory(new ArmoredInputStream(new ByteArrayInputStream(keyStr.getBytes)))
+    pubKeyOf.iterator().asScala.collectFirst {
+      case keyRing: PGPPublicKeyRing =>
+        keyRing.getPublicKey().getKeyID
+    }
+  }
+
+  def getGpgKey(gpgKeyId: Long)(implicit s: Session): Option[PGPPublicKey] = {
+    val pubKeyOpt = GpgKeys.filter(_.byGpgKeyId(gpgKeyId)).map { _.publicKey }.firstOption
+    pubKeyOpt.flatMap { pubKeyStr =>
+      val pubKeyObjFactory =
+        new BcPGPObjectFactory(new ArmoredInputStream(new ByteArrayInputStream(pubKeyStr.getBytes())))
+      pubKeyObjFactory.nextObject() match {
+        case pubKeyRing: PGPPublicKeyRing =>
+          Option(pubKeyRing.getPublicKey(gpgKeyId))
+        case _ =>
+          None
+      }
+    }
+  }
+
+  def verifySign(signInfo: JGitUtil.GpgSignInfo)(implicit s: Session): Option[JGitUtil.GpgVerifyInfo] = {
+    new BcPGPObjectFactory(new ArmoredInputStream(new ByteArrayInputStream(signInfo.signArmored)))
+      .iterator()
+      .asScala
+      .flatMap {
+        case signList: PGPSignatureList =>
+          signList
+            .iterator()
+            .asScala
+            .flatMap { sign =>
+              getGpgKey(sign.getKeyID)
+                .map { pubKey =>
+                  sign.init(new BcPGPContentVerifierBuilderProvider, pubKey)
+                  sign.update(signInfo.target)
+                  (sign, pubKey)
+                }
+                .collect {
+                  case (sign, pubKey) if sign.verify() =>
+                    JGitUtil.GpgVerifyInfo(pubKey.getUserIDs.next, pubKey.getKeyID.toHexString.toUpperCase)
+                }
+            }
+
+      }
+      .toList
+      .headOption
+  }
+}
diff --git a/src/main/scala/gitbucket/core/util/JGitUtil.scala b/src/main/scala/gitbucket/core/util/JGitUtil.scala
index 16d6e8e..e875a2b 100644
--- a/src/main/scala/gitbucket/core/util/JGitUtil.scala
+++ b/src/main/scala/gitbucket/core/util/JGitUtil.scala
@@ -1,6 +1,6 @@
 package gitbucket.core.util
 
-import java.io.{ByteArrayOutputStream, File, FileInputStream, InputStream}
+import java.io._
 
 import gitbucket.core.service.RepositoryService
 import org.eclipse.jgit.api.Git
@@ -76,6 +76,59 @@
   )
 
   /**
+   * The gpg commit sign data.
+   * @param signArmored signature for commit
+   * @param target string for verification target
+   */
+  case class GpgSignInfo(signArmored: Array[Byte], target: Array[Byte])
+
+  /**
+   * The verified gpg sign data.
+   * @param signedUser
+   * @param signedKeyId
+   */
+  case class GpgVerifyInfo(signedUser: String, signedKeyId: String)
+
+  private def getSignTarget(rev: RevCommit): Array[Byte] = {
+    val ascii = "ASCII"
+    val os = new ByteArrayOutputStream()
+    val w = new OutputStreamWriter(os, rev.getEncoding)
+    os.write("tree ".getBytes(ascii))
+    rev.getTree.copyTo(os)
+    os.write('\n')
+
+    rev.getParents.foreach { p =>
+      os.write("parent ".getBytes(ascii))
+      p.copyTo(os)
+      os.write('\n')
+    }
+
+    os.write("author ".getBytes(ascii))
+    w.write(rev.getAuthorIdent.toExternalString)
+    w.flush()
+    os.write('\n')
+
+    os.write("committer ".getBytes(ascii))
+    w.write(rev.getCommitterIdent.toExternalString)
+    w.flush()
+    os.write('\n')
+
+    if (rev.getEncoding.name != "UTF-8") {
+      os.write("encoding ".getBytes(ascii))
+      os.write(Constants.encodeASCII(rev.getEncoding.name))
+      os.write('\n')
+    }
+
+    os.write('\n')
+
+    if (!rev.getFullMessage.isEmpty) {
+      w.write(rev.getFullMessage)
+      w.flush()
+    }
+    os.toByteArray
+  }
+
+  /**
    * The commit data.
    *
    * @param id the commit id
@@ -99,7 +152,9 @@
     authorEmailAddress: String,
     commitTime: Date,
     committerName: String,
-    committerEmailAddress: String
+    committerEmailAddress: String,
+    commitSign: Option[GpgSignInfo],
+    verified: Option[GpgVerifyInfo]
   ) {
 
     def this(rev: org.eclipse.jgit.revwalk.RevCommit) =
@@ -113,7 +168,11 @@
         rev.getAuthorIdent.getEmailAddress,
         rev.getCommitterIdent.getWhen,
         rev.getCommitterIdent.getName,
-        rev.getCommitterIdent.getEmailAddress
+        rev.getCommitterIdent.getEmailAddress,
+        Option(rev.getRawGpgSignature).map { s =>
+          GpgSignInfo(s, getSignTarget(rev))
+        },
+        None
       )
 
     val summary = getSummaryMessage(fullMessage, shortMessage)
diff --git a/src/main/twirl/gitbucket/core/account/gpg.scala.html b/src/main/twirl/gitbucket/core/account/gpg.scala.html
new file mode 100644
index 0000000..e453124
--- /dev/null
+++ b/src/main/twirl/gitbucket/core/account/gpg.scala.html
@@ -0,0 +1,39 @@
+@(account: gitbucket.core.model.Account, gpgKeys: List[gitbucket.core.model.GpgKey])(implicit context: gitbucket.core.controller.Context)
+@import gitbucket.core.ssh.SshUtil
+@gitbucket.core.html.main("GPG Keys"){
+  @gitbucket.core.account.html.menu("gpg", context.loginAccount.get.userName, false){
+    <div class="panel panel-default">
+      <div class="panel-heading strong">GPG Keys</div>
+      <div class="panel-body">
+        @if(gpgKeys.isEmpty){
+          No keys
+        }
+        @gpgKeys.zipWithIndex.map { case (key, i) =>
+          @if(i != 0){
+            <hr>
+          }
+        <strong style="line-height: 30px;">@key.title</strong> (@key.gpgKeyId.toHexString.toUpperCase)
+        <a href="@context.path/@account.userName/_gpg/delete/@key.keyId" class="btn btn-sm btn-danger pull-right">Delete</a>
+        }
+      </div>
+    </div>
+    <form method="POST" action="@context.path/@account.userName/_gpg" validate="true" autocomplete="off">
+      <div class="panel panel-default">
+        <div class="panel-heading strong">Add a GPG Key</div>
+        <div class="panel-body">
+          <fieldset class="form-group">
+            <label for="title" class="strong">Title</label>
+            <div><span id="error-title" class="error"></span></div>
+            <input type="text" name="title" id="title" class="form-control"/>
+          </fieldset>
+          <fieldset class="form-group">
+            <label for="publicKey" class="strong">Key</label>
+            <div><span id="error-publicKey" class="error"></span></div>
+            <textarea name="publicKey" id="publicKey" class="form-control" style="height: 200px;"></textarea>
+          </fieldset>
+          <input type="submit" class="btn btn-success" value="Add"/>
+        </div>
+      </div>
+    </form>
+  }
+}
diff --git a/src/main/twirl/gitbucket/core/account/menu.scala.html b/src/main/twirl/gitbucket/core/account/menu.scala.html
index 07fc46b..b7ed72d 100644
--- a/src/main/twirl/gitbucket/core/account/menu.scala.html
+++ b/src/main/twirl/gitbucket/core/account/menu.scala.html
@@ -26,6 +26,11 @@
             </a>
           </li>
         }
+        <li class="menu-item-hover @if(active=="gpg"){active}">
+          <a href="@context.path/@userName/_gpg">
+            <i class="menu-icon octicon octicon-key"></i> <span>GPG Keys</span>
+          </a>
+        </li>
         <li class="menu-item-hover @if(active=="application"){active}">
           <a href="@context.path/@userName/_application">
             <i class="menu-icon octicon octicon-rocket"></i> <span>Applications</span>
diff --git a/src/main/twirl/gitbucket/core/repo/commits.scala.html b/src/main/twirl/gitbucket/core/repo/commits.scala.html
index e914702..2b715b5 100644
--- a/src/main/twirl/gitbucket/core/repo/commits.scala.html
+++ b/src/main/twirl/gitbucket/core/repo/commits.scala.html
@@ -40,6 +40,13 @@
           @if(i != 0){ <tr> }
           <td>
             <div class="pull-right text-right">
+              @if(commit.commitSign.isDefined){
+                @commit.verified.map{ v =>
+                  <span class="gpg-verified">Verified signed by @v.signedUser (@v.signedKeyId)</span>
+                }.getOrElse{
+                  <span class="gpg-unverified">Unverified</span>
+                }
+              }
               @defining(getTags(commit.id)) { tags =>
                 @if(tags.nonEmpty){
                   <span class="muted">
diff --git a/src/test/scala/gitbucket/core/api/ApiSpecModels.scala b/src/test/scala/gitbucket/core/api/ApiSpecModels.scala
index 4048422..0085b9d 100644
--- a/src/test/scala/gitbucket/core/api/ApiSpecModels.scala
+++ b/src/test/scala/gitbucket/core/api/ApiSpecModels.scala
@@ -250,7 +250,9 @@
       authorEmailAddress = account.mailAddress,
       commitTime = date1,
       committerName = account.userName,
-      committerEmailAddress = account.mailAddress
+      committerEmailAddress = account.mailAddress,
+      None,
+      None
   )
 
   val apiCommitListItem = ApiCommitListItem(