diff -urN unzip60-orig/extract.c unzip60/extract.c
--- unzip60-orig/extract.c	2009-03-14 10:32:52 +0900
+++ unzip60/extract.c	2012-01-30 22:20:59 +0900
@@ -1255,7 +1255,7 @@
         if (G.lrec.compression_method == STORED) {
             zusz_t csiz_decrypted = G.lrec.csize;
 
-            if (G.pInfo->encrypted)
+            if (G.pInfo->encrypted && csiz_decrypted > 0)
                 csiz_decrypted -= 12;
             if (G.lrec.ucsize != csiz_decrypted) {
                 Info(slide, 0x401, ((char *)slide,
@@ -1270,7 +1270,7 @@
         }
 
 #if CRYPT
-        if (G.pInfo->encrypted &&
+        if (G.pInfo->encrypted && G.lrec.csize > 0 &&
             (error = decrypt(__G__ uO.pwdarg)) != PK_COOL) {
             if (error == PK_WARN) {
                 if (!((uO.tflag && uO.qflag) || (!uO.tflag && !QCOND2)))