Fiddler Jam extension is a Chrome extension tool that can capture the ongoing tab activity and generate links with the captured activity logs. With such functionality, a particular set of security is added as functionality to Fiddler Jam to protect its users' privacy and allow you to share logs with some information being entirely stripped. Here are the must-know highlights when capturing and sharing Fiddler Jam logs.
- Fiddler Jam captures the Chrome tab's content where Fiddler Jam capturing is initialized plus all tabs and windows opened from that tab (and all tabs and windows opened from them). All tabs and windows with active capturing will have the red dot indication in the Fiddler Jam extension.
- By default (**Mask all post data** swithed off), Fiddler Jam will try to automatically mask sensitive POST data (when the data is in known formats). Data received in unknown format will be considered sensetive by default and will be masked at 100%. Switching **Mask all post data** on will explicitly turn on masking of all POST data. Learn more about [the sensetive data masking and the known formats](#masking-sensetive-data).
- The default settings (see the [**Capture Options**](#capture-options) below) will mask cookies values.
- The Fiddler Jam logs are stored in cloud storage based in the US, North Virginia. The Fiddle Jam team doesn't have access to and can't recover password-protected log content. See more about the password protecting option in the [**Sharing Links**](#sharing-links) option.
- By default, The FiddlerJam portal site is collecting usage statistics data. Learn more about how to enable and disable the collection of usage data via the [Privacy settings]({%slug fj-portal%}#privacy-settings)
By default, the Fiddler Jam extension will start capturing with the advanced option **Mask all post data** switched **off**. In that state, the Fiddler Jam extension will try to automatically mask all sensetive data that is contained in one of the following known formats (MIME types):
- **application/json**
- **application/xml**
- **application/x-www-form-urlencoded**
- **multipart/form-data**
- any that match application/* and have either the word **json** or **xml** on the right side
Data in other unsupported MIME types or unknown formats is fully masked.
When the advanced option **Mask all post data** is switched **on**, all POST data (including the known formats listed above) is fully masked.
### What is Sensetive Data
Fiddler Jam considers the following as a sensetive data:
1. POST data where the **property name** is tested for keywords that can contain potentially sensitive data such as:
- rsa, dsa, ed25519, ecdsa which are cryptographic algorithms commonly used for private keys
- contains the words **private**
- contains the word **key**
- contains the words **pass** or **pwd**
- cointain the word **secret**
- contqins the word **credential**
- contains the word **token**
- contains the word **ssh**
- contains the words **api** and **key**
- contains the word **auth**
- contains any of the following words: **card|credit|debit|mastercard|visa|discover|diners|american.?express|amex|carte|karte|carta|atm|tarjeta**
- contains any of the words: **cvv|cvc|verification|security|transaction|sicherheits|sicurezza|seguranca|securite**
2. POST data where the **property value** is tested against regex expressions for known credentials, keys or credit cards including:
3. Following headers also get masked:* Authorization* WWW-Authenticate* Proxy-Authorization - not able to check* Proxy-Authenticate - not able to check
The **Capture Options** menu provides some useful functionalities to will be applied during the capturing. Before you record a log, consider the following security concerns.
- **Take screenshots while capturing** - This option will add a screenshot of your initial action from the active Chrome tab. Before you record a log, consider disabling the screenshot option if your screen shows sensitive data. **Turned ON by default**.
- **Capture console** - This option will include any developers console outputs in the recorded log. Before you record a log, consider disabling this functionality if your console logs contain sensitive information. **Turned ON by default**.
- **Mask cookies** - When active, this option masks all cookies values (cookie key names are still readable!) so that they won't be visible to the portal users receiving the log. **Turned ON by default**.
- **Mask post data** - This option captures the user's information in text inputs and forms. That might include sensitive information like usernames, personal information, etc. **Turned ON by default**.
- **Disable cache** - This option sets the `Cache-Control` and `Pragma` headers to **no-cache** value on each network request. **Turned ON by default**.
- For logs generated with **Share with specific people** options: Only [Fiddler Jam portal users and viewers]({%slug fj-portal%}) that is explicitly included in the share list will be able to open the link.
- For logs generated with **Password protection** option: Only [Fiddler Jam portal users and viewers]({%slug fj-portal%}) that knows the password could open the link. The logs are distributed as HAR files, which are encrypted with the AES-CTR encryption algorithm.
