gogost.go          |  2 +-
 gost3410/curve.go  | 12 ++++++++++++
 gost3410/public.go |  9 +++++++++
 news.texi          |  4 ++++

diff --git a/gogost.go b/gogost.go
index 0141a62871a6e7ddec73ac332a75a694ff65460194478ccbe27843b92a6a8472..23355cd266cdc92233697f68729f801ccfb5936d41c93be0a06949b818b547b8 100644
--- a/gogost.go
+++ b/gogost.go
@@ -1,4 +1,4 @@
 // Pure Go GOST cryptographic functions library.
 package gogost
 
-const Version = "5.6.0"
+const Version = "5.7.0"
diff --git a/gost3410/curve.go b/gost3410/curve.go
index 0bdac6531652b84d0845361fe9a383c06dd6334d545970c17960963788a9ddc9..dab3558db11814702db1d20cf4af550d78be9c999108a2af4f19344e7655e047 100644
--- a/gost3410/curve.go
+++ b/gost3410/curve.go
@@ -159,3 +159,15 @@ 		c.add(cx, cy, cx, cy)
 	}
 	return tx, ty, nil
 }
+
+func (our *Curve) Equal(their *Curve) bool {
+	return our.P.Cmp(their.P) == 0 &&
+		our.Q.Cmp(their.Q) == 0 &&
+		our.A.Cmp(their.A) == 0 &&
+		our.B.Cmp(their.B) == 0 &&
+		our.X.Cmp(their.X) == 0 &&
+		our.Y.Cmp(their.Y) == 0 &&
+		((our.E == nil && their.E == nil) || our.E.Cmp(their.E) == 0) &&
+		((our.D == nil && their.D == nil) || our.D.Cmp(their.D) == 0) &&
+		our.Co.Cmp(their.Co) == 0
+}
diff --git a/gost3410/public.go b/gost3410/public.go
index cd7c595af4c81456fe4b525174460a7563fe2c485beec5ee310440a563ad2247..144d2f0fe542cbcd23f460dbeb68ea3797747988db47c2b2a789476a49b718c0 100644
--- a/gost3410/public.go
+++ b/gost3410/public.go
@@ -16,6 +16,7 @@
 package gost3410
 
 import (
+	"crypto"
 	"fmt"
 	"math/big"
 )
@@ -107,3 +108,11 @@ 	}
 	lm.Mod(lm, pub.C.Q)
 	return lm.Cmp(r) == 0, nil
 }
+
+func (our *PublicKey) Equal(theirKey crypto.PublicKey) bool {
+	their, ok := theirKey.(*PublicKey)
+	if !ok {
+		return false
+	}
+	return our.X.Cmp(their.X) == 0 && our.X.Cmp(their.Y) == 0 && our.C.Equal(their.C)
+}
diff --git a/news.texi b/news.texi
index 07b52a6cdadf77a09f9c5288f80e4ddf968da04f1bc77de263fb6b4e3abe6db3..cf3aca95f2151f8119d20169e978aecd89c5891cf99748d4e439da0040e6e33f 100644
--- a/news.texi
+++ b/news.texi
@@ -3,6 +3,10 @@ @unnumbered News
 
 @table @strong
 
+@anchor{Release 5.7.0}
+@item 5.7.0
+Go 1.17 requires @code{gost3410.PublicKey} to have @code{Equal} method.
+
 @anchor{Release 5.6.0}
 @item 5.6.0
     @itemize