diff --git a/rokey/cache.go b/rokey/cache.go
new file mode 100644
index 00000000..25a8257e
--- /dev/null
+++ b/rokey/cache.go
@@ -0,0 +1,70 @@
+package rokey
+
+import (
+	"fmt"
+	"sync"
+	"time"
+
+	"github.com/pritunl/mongo-go-driver/bson/primitive"
+)
+
+var (
+	cache         = map[primitive.ObjectID]*Rokey{}
+	cacheLock     = sync.RWMutex{}
+	cacheTime     = map[string]*Rokey{}
+	cacheTimeLock = sync.RWMutex{}
+)
+
+func GetCache(typ string, timeblock time.Time) *Rokey {
+	cacheTimeLock.RLock()
+	rkey := cacheTime[fmt.Sprintf("%s-%d", typ, timeblock.Unix())]
+	cacheTimeLock.RUnlock()
+	if rkey != nil && rkey.Type == typ {
+		return rkey
+	}
+	return nil
+}
+
+func GetCacheId(typ string, rkeyId primitive.ObjectID) *Rokey {
+	cacheLock.RLock()
+	rkey := cache[rkeyId]
+	cacheLock.RUnlock()
+	if rkey != nil && rkey.Type == typ {
+		return rkey
+	}
+	return nil
+}
+
+func PutCache(rkey *Rokey) {
+	cacheLock.Lock()
+	cache[rkey.Id] = rkey
+	cacheLock.Unlock()
+	cacheTimeLock.Lock()
+	cacheTime[fmt.Sprintf("%s-%d", rkey.Type, rkey.Timeblock.Unix())] = rkey
+	cacheTimeLock.Unlock()
+}
+
+func CleanCache() {
+	cacheLock.Lock()
+	for key, rkey := range cache {
+		if time.Since(rkey.Timestamp) >= 721*time.Hour {
+			delete(cache, key)
+		}
+	}
+	cacheLock.Unlock()
+
+	cacheTimeLock.Lock()
+	for key, rkey := range cacheTime {
+		if time.Since(rkey.Timestamp) >= 721*time.Hour {
+			delete(cacheTime, key)
+		}
+	}
+	cacheTimeLock.Unlock()
+}
+
+func init() {
+	go func() {
+		time.Sleep(1 * time.Hour)
+		CleanCache()
+	}()
+}