@Override
  public String toString() {
    return "cipher=" + (cipher != null ? cipher.getName() : "NONE") + " keyHash="
      + (keyHash != null ? keyHash.substring(0, 8) + "..." : "NONE");
  }
Crypto context. Encapsulates an encryption algorithm and its key material.
hbase-common/src/main/java/org/apache/hadoop/hbase/io/crypto/Context.java