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Password Protected Zip File Encryption Settings

1) Algorithm of Zip File Encryption

HDE One apply to ZIP 2.0 compatible encryption "traditional PKWARE encryption" format, it change the attachment file to password protected zip file and send email automatically.

2) Flow of Encryption

You can set up whether encrypt or not with filtering settings or encryption setting. In addition, you can choose "Fixed Password" or "Random Password"

Therefore, There are some options.For instance, you can use "Fixed Password" when you send a email with attachment file to particular customer, or, you do not encrypt attachment file when you send a email to particular recipient.

The encryption flow is below:

step1 - Apply Filter

In this step, encryption rules that you set up in "Filter" - "Define Filters" are applied to email with attachment file.

step2 - Confirm "File Extensions Skipped Encryption"

Check the File extensions If there are file extensions you want to exclude from encryption processing.

step3 - Apply Encryption policy

In this step, encryption policy that you set up in "Encryption" - "Define Encryption Policy" are applied to email with attachment file.

Encryption policy consists of the combination of "Sender", "Recipient" and "Encryption Type", and is applied in order of priority.

  • Sender and Recipient
    you can set "Sender" and "Recipient" that are created in "Filter" - "Define Mail Group".
  • Encryption Type
    You can set up as below:
       - Password Type (Fixed Password / Random Password)
       - Password notification for Recipient
       - File extension of Zip file

This article consists of instructions on how to properly configure and customise the settings in Password Protected Zip File Encryption in order to best suit the environment of your organisation.

There are three parts of settings in Email DLP Admin Guides: Data Loss Prevention SettingsSending Approval Settings and Password Protected Zip File Encryption Settings. As for this particular article, only the Password Protected Zip File Encryption Settings will be explained. The Sending Approval Settings and Password Zip File Encryption Settings can be found in separate documents.

This Setting Guide contains three parts:
1) Define Encryption Type
2) Define Encryption Policy
3) Define Common Setting 

1) Define Encryption Type

☆ 1 - Click "Encryption" - "Define Encryption Type" in the left pane, and click "New Encryption Type" in the toolbar.

☆ 2 - Enter "Encryption Type Name" and "Comment".

The setting contents:

1) Encryption Type NameEnter any name of Encryption Type Name.
2) CommentEnter any explanation of Encryption Type Name.

☆ 3 - Select "Password Type".

The setting contents:
1) Password TypeSpecify a type of password which is used for automatic attachment encryption.

  • Fixed Password : A password in fixed format will be used. A notification message for recipient is not sent if fixed password is used.
  • Random PasswordA randomly generated password is used as default encryption. However, you can switch notification message for recipient.

☆ 4 - If you select "Fixed Password", enter "Format" as below. (If you select "Random Password", proceed to next step.)

The setting contents:
1) FormatIf you select "Fieed Password", specify a password which is used for automatic attachment encryption. It must be within 60 characters, which you can use as below:

  • Alphabet :   Upper case and Lower case.
  • Number :   0123456789
  • Symbol :   `~!@#$%^&*()_+-={}|[]\:;'<>?,./"
  • Tag :
       ((%YEAR%))  :   The year which an mail send on(2010, 2011, 2012...)
       ((%MONTH%))  :   The month which an mail send on(01, 02, 03, ..., 12)
       ((%DAY%)) :   The day which an mail send on(01, 02, 03, ..., 31)

☆ 5 If you select "Random Password", enter "Generate password individually" as below. (If you select "Fixed Password", return to the previous step.)

The setting contents:
1) Generate password individuallyIf you select "Random Password", check "Generate password individually".

2) Notification Message (for Recipient)Specify the notification message sent to the recipient.

☆ 6After setting "Generated ZIP Extension", click "Register".

The setting contents:
1) Generated ZIP ExtensionSpecify the file extension of the generated ZIP file. It must be within 5 characters which you can use as below:

  • Alphabet :   Upper case and Lower case.
  • Number :   0123456789
  • Symbol :   _ (Underscore) 

☆ 7 - Depending on your need, you can delete the "Encryption Type" by checking the type and push "Delete" button.

*Note - When you delete a Encryption Type, the Encryption Policy that this type depends on is also removed at the same time.

2) Define Encryption Policy

☆ 1 - Click "Encryption" - "Define Encryption Policy" in the left pane, and click "Add Encryption policy" in the toolbar.

☆ 2 - Set "Priority" value.

The setting contents:
1) PriorityIt must be between 1 and 99999. A lower value corresponds to a higher priority. 

☆ 3 - Select values of "Sender" and "Recipient".

The setting contents:
1) SenderJudged by the SMTP envelope sender value rather than the value of the From: header. You can create a mail group in "Define Mail Group" menu if you want to register email addresses to be applied an Encryption Type.
2) RecipientJudged by the SMTP envelope recipient value rather than the value of the To: header. You can create a mail group in "Define Mail Group" menu if you want to register email addresses to be applied an Encryption Type.
For the instructions on how to setting up Mail Group
please refer to this link :  Data Loss Prevention Settings

☆ 4 - After setting "Encryption Type", click "Register".

The setting contents:
1) Encryption TypeYou can create a Encryption Type in "Define Encryption Type" menu if you want to make it.

☆5 - Depending on your need, you can delete the "Encryption Policy" by checking the type and push "Delete" button.

3) Define Common Settings

☆ 1 Click "Encryption" - "Common Settings" in the left pane.

☆ 2 - Set up "Length" and "Available Character Set" in the "Random Password Settings" field.

The setting contents:
1) LengthSpecify the length of the random password. Max value is 30 characters and Minimum is 8.
2) Available Character SetThe password is generated by random combinations from the selected character sets as below.

  • Number :   23456789
  • Alphabet(Upper Case) :   ABCDEFGHJKLMNPQRSTUVWXY
  • Alphabet(Lower Case) :   abcdefghijkmnpqrstuvwyz
  • Symbol :   ~!%^&()+={}|[]:;?,./

☆ 3 - Enter "File Extensions Skipped Encryption" in the "Exclude Options" field.

1) File Extensions Skipped EncryptionIf there are file extensions you want to exclude from encryption processing specifically, you can specify their extension. The encryption is not applied to attachment files with the specified extension. 

☆ 4 - Specify whether the password notification message is sent to the sender or the recipient.

The setting contents:
1) Notify to SenderThis notification is always enabled while Single Sign-On is disabled in "Account"-"Single Sign-On" menu. Even if this notification is disabled, the sender can check the information in "Encryption"-"History" menu.
For the instructions on how to setting up Mail Group
please refer to this link :  HDE Email DLP User Guides2) Notify to RecipientIf the notification is disabled, notification message is never sent to the recipient regardless of Encryption Policy settings. Then, the sender has to tell the recipient what the password is somehow or other.

☆ 5 - Depending on your need, you can modify a template of the message body to inform the random password which can be used to extract the encrypted attachments.

 6 - Click "Register" button.

 

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