Before you contact technical support review all help topics on this page to make sure your issue hasn’t already been answered. You should also take a look at the Facebook's Known Issues page to make sure the problem isn’t a known Facebook bug.

Otherwise you can send e-mail to help@synapsid.com and I’ll help.
I get lots of email and sometimes it might take a few days before I can respond.

Managing Keys

A “Key” comprises your public and private key and is used to encrypt and decrypt messages. A key will automatically be created for you if you don’t import one prior to sending your first message.

Your key should never be shared with anyone and you should enact reasonable security precautions to protect your key from being discovered by other people. You should enable the Passcode lock feature in the Settings and make sure your backups are encrypted.

If you lose or delete a key any messages that were encrypted with that key will be lost forever. You should backup your keys as a precaution. Any keys exported from Synapsid will use the PKCS12 encrypted archive format. Please be aware that your keys are not backed up by iCloud, there are some security issues with this that need to be addressed in a later version.

How to Send Encrypted Messages

Prior to sending an encrypted message you will need to obtain the recipients public key. A public key is automatically obtained when someone sends you a signed message using Synapsid (or an S/MIME compliant e-mail). If you would like to receive encrypted messages from people then you should send them a signed message so they have your private key and can response with an encrypted message. Message signing is turned on by default when sending messages from Synapsid, this helps spread your public key so more people can potentially reply using encryption.

Importing Keys

You can import a key on your device by sending yourself a PKCS12 encrypted archive as an attachment in an e-mail that you can read on your iPhone or iPad. The PKCS12 attachment must be password protected, and the filename’s extension must be changed to “.synapsid” or “.synaps1d” otherwise iOS will interfere and add the key to the Mail app. If you export your key from Synapsid it will automatically attach a compatible version that you can then re-import in Synapsid on a different device (this allows you to use the same key on all your devices).

Using an S/MIME key from a certificate authority has some advantages over the self-signed key Synapsid automatically creates. The major difference is people won’t receive a warning about an unverified self-signed certificate when sending them e-mail.

Synapsid supports S/MIME keys from any issuer. You’ll need to find out your Facebook e-mail address which is typically [username] @ facebook.com or [user identifier] @ facebook.com if you never setup a shortcut url for your profile. You could also send a message from your Facebook account to your e-mail address.

Most certificate authorities issue S/MIME credentials, which one you use is up to you. I use SmartCom which provides free S/MIME keys and certificates.

Key Import

Exporting Keys

You can export your keys for backup purposes or if you need to use the same key on multiple devices. Currently you can only export keys via e-mail, additional options will be available in a later release.

To export your keys go to the sidebar and tap “Keys”, next tap the “Export” button. You must enter a passphrase in order to export your keys.