diff --git a/DigitalData.Core.Security/Cryptographer/CryptographerExtensions.cs b/DigitalData.Core.Security/Cryptographer/CryptographerExtensions.cs
index 5c892c5..47ce618 100644
--- a/DigitalData.Core.Security/Cryptographer/CryptographerExtensions.cs
+++ b/DigitalData.Core.Security/Cryptographer/CryptographerExtensions.cs
@@ -1,24 +1,26 @@
-namespace DigitalData.Core.Security.Cryptographer
+using DigitalData.Core.Abstractions.Security;
+
+namespace DigitalData.Core.Security.Cryptographer
 {
     public static class CryptographerExtensions
     {
-        public static IEnumerable<TRSACryptographer> GetByIssuer<TRSACryptographer>(this IEnumerable<TRSACryptographer> cryptographers, string issuer) where TRSACryptographer: RSACryptographer
+        public static IEnumerable<TRSACryptographer> GetByIssuer<TRSACryptographer>(this IEnumerable<TRSACryptographer> cryptographers, string issuer) where TRSACryptographer: IRSACryptographer
             => cryptographers.Where(c => c.Issuer == issuer);
 
-        public static IEnumerable<TRSACryptographer> GetByAudience<TRSACryptographer>(this IEnumerable<TRSACryptographer> cryptographers, string audience) where TRSACryptographer : RSACryptographer
+        public static IEnumerable<TRSACryptographer> GetByAudience<TRSACryptographer>(this IEnumerable<TRSACryptographer> cryptographers, string audience) where TRSACryptographer : IRSACryptographer
             => cryptographers.Where(c => c.Audience == audience);
 
-        public static TRSACryptographer Get<TRSACryptographer>(this IEnumerable<TRSACryptographer> cryptographers, string issuer, string audience) where TRSACryptographer : RSACryptographer
+        public static TRSACryptographer Get<TRSACryptographer>(this IEnumerable<TRSACryptographer> cryptographers, string issuer, string audience) where TRSACryptographer : IRSACryptographer
             => cryptographers.Where(c => c.Issuer == issuer && c.Audience == audience).SingleOrDefault()
             ?? throw new InvalidOperationException($"No {typeof(TRSACryptographer).GetType().Name.TrimStart('I')} found with Issuer: {issuer} and Audience: {audience}.");
 
-        public static bool TryGet<TRSACryptographer>(this IEnumerable<TRSACryptographer> cryptographers, string issuer, string audience, out TRSACryptographer? cryptographer) where TRSACryptographer : RSACryptographer
+        public static bool TryGet<TRSACryptographer>(this IEnumerable<TRSACryptographer> cryptographers, string issuer, string audience, out TRSACryptographer? cryptographer) where TRSACryptographer : IRSACryptographer
         {
             cryptographer = cryptographers.SingleOrDefault(c => c.Issuer == issuer && c.Audience == audience);
             return cryptographer is not null;
         }
 
-        public static RSACryptographerList<TRSACryptographer> ToCryptographerList<TRSACryptographer>(this IEnumerable<TRSACryptographer> cryptographers, Func<TRSACryptographer, string> keyGenerator) where TRSACryptographer : RSACryptographer
+        public static RSACryptographerList<TRSACryptographer> ToCryptographerList<TRSACryptographer>(this IEnumerable<TRSACryptographer> cryptographers, Func<TRSACryptographer, string> keyGenerator) where TRSACryptographer : IRSACryptographer
             => new(keyGenerator: keyGenerator, cryptographers: cryptographers);
     }
 }
\ No newline at end of file