| File extension | Developer/Producer | File description |
|---|---|---|
| $EFS file extension | Microsoft Corporation | Encrypted EFS Format |
| A2R file extension | MyPlanetSoft.com | KittyXplorer Encrypted Archive |
| ADOC file extension | N/A | Authentica Secure Office Encoded Word Document |
| AEE file extension | ASUSTeK Computer Inc. | ASUS Data Security Manager Encoded |
| AES file extension | Packetizer | AES Crypt Encrypted Format |
| AEXPK file extension | PGP Corporation | PGP Armored Extracted Public Key |
| AFP file extension | AndrosaSoft | FileProtector Encrypted Format |
| AFS3 file extension | Osborn Software | AFS 3 Basic Encrypted |
| AGILEKEYCHAIN file extension | AgileBits Inc. | 1Password Data |
| APV file extension | Dexadine, Inc. | Acerose Password |
| APW file extension | RomanLab Co. Ltd. | Password |
| ARM file extension | Silicon Realms Toolworks | SoftwarePassport Protection System |
| ASC file extension | PGP | PGP Armored Format |
| AUTH file extension | ShopSite, Inc. | ShopSite Store Authorization |
| AVN file extension | altaVENTE | AltaVENTE Application User Notes |
| AZF file extension | AirZip | Secure Format |
| AZS file extension | AirZip | Secure Format |
| B2A file extension | N/A | Binary To ASCII (BTOA) Encoded Format |
| BEXPK file extension | PGP Corporation | PGP Binary Extracted Public Key |
| BFA file extension | N/A | Blowfish-encrypted Format |
| BFE file extension | Johnny Shelley | Bcrypt - BlowFish File Encryption |
| BHX file extension | N/A | BinHex Compressed File ASCII Archive |
| BIN file extension | N/A | Macbinary II Encoded Format |
| BIOEXCESS file extension | Egis Technology Inc. | MyWinLocker Protected |
| BMPENX file extension | Egis Technology Inc. | Encrypted BMP |
| BNC file extension | Bojanov Software | Bojanov Encryptor Encrypted |
| BPK file extension | Nero | Nero SecurDisc Public Key Format |
| BPW file extension | Bitser | Bitser Password Format |
| BSK file extension | Nero | Nero SecurDisc Private Key Format |
| BTOA file extension | N/A | Binary-to-ASCII File Format |
| BVD file extension | Bitdefender | BitDefender Vault Format |
| C2V file extension | WellSight Systems Inc. | WellSight Systems License Information |
| CAE file extension | SourceForge.net | Caditor Encrypted Document |
| CCF file extension | CryptLoad | CryptLoad Container Format |
| CEF file extension | CenturionSoft | CenturionMail Format |
| CFD file extension | Ranquel Technologies | CryptoForge Document |
| CFE file extension | Ranquel Technologies | CryptoForge Encrypted |
| CGP file extension | CodeGazer | PixelCryptor Encrypted Format |
| CHI file extension | SourceForge.net | TOMBO Encrypted |
| CHML file extension | Krasbit Technologies | Chameleon Encrypted Format |
| CLX file extension | Ceelox | Ceelox SecureMail Encrypted Document |
| CNG file extension | Vassil Arabadjiev | CryptoNG Encrypted Format |
| CPIO file extension | N/A | Unix CPIO Archive Format |
| CPT file extension | Peter Selinger | CCRYPT Encrypted Format |
| CRYPT file extension | WhatsApp Inc. | WhatsApp Messenger Encrypted Message Database Backup |
| CRYPTED file extension | Ashampoo | Ashampoo WinOptimizer Encrypted Format |
| CRYPTOMITE file extension | BAxBEx Software | CryptoMite Encrypted Archive |
| CRYPTRA file extension | BMB Software | Cryptra Encrypted Format |
| CSJ file extension | BlackBerry (Research In Motion Limited) | RIM CSJ Registration |
| DC4 file extension | ViaThinkSoft | ViaThinkSoft (De)Coder Format |
| DCD file extension | COSECT | DisCryptor Encrypted Database Format |
| DCF file extension | COSECT | DisCryptor Encrypted Archive |
| DCO file extension | COSECT | DisCryptor Encrypted Archive |
| DCV file extension | SecurStar | DriveCrypt Encrypted Volume |
| DIM file extension | N/A | Direct Internet Message Encapsulation DIME Format |
| DIME file extension | N/A | Direct Internet Message Encapsulation Format |
| DLC file extension | N/A | JDownloader Download Link Container |
| DOCENX file extension | Egis Technology Inc. | Egis Encrypted Word DOC |
| DOCXENX file extension | Egis Technology Inc. | Egis Encrypted Word DOCX |
| DOTMENX file extension | Egis Technology Inc. | Egis Encrypted Word DOTM |
| DOTXENX file extension | Egis Technology Inc. | Egis Encrypted Word DOTX |
| DWX file extension | N/A | CADLock Locked AutoCAD Drawing |
| E4A file extension | Encrypt4all | Encrypt4all Archive Format |
| ECR file extension | Email Connection (Pty) Ltd. | Ecrypt Encrypted |
| EE file extension | Baltsoft Software | Encrypt Easy Encrypted |
| EEA file extension | Scanlon Associates | Encrypted E-mail Attachment |
| EFF file extension | eFileFolders | EFileFolders |
| EFL file extension | XenoSystems | Encryptafile Encrypted Format |
| EFR file extension | XenoSystems | Encryptafile Private Key Format |
| EFU file extension | XenoSystems | Encryptafile Public Key Format |
| EGISENC file extension | Egis Technology Inc. | Egis Encrypted |
| EGISENX file extension | Egis Technology Inc. | Egis Encryped |
| EGS file extension | Esri | GIS Software Encrypted Grid Shape |
| EID file extension | Faena.com | Faena MyID Encrypted |
| EMBP file extension | Amazon.com, Inc. | Mobipocket EBook Encrypted Auxiliary |
| EMC file extension | Striata | Striata Reader Encrypted Document Format |
| ENC file extension | N/A | Uuencode Encoded Format |
| ENCIPHERED file extension | N/A | Malware (ransomware) Encoded |
| EOC file extension | 2BrightSparks | EncryptOnClick Encrypted |
| EZK file extension | EasyKrypt LLC. | EasyKrypt Encrypted |
| FGP file extension | WinAbility Software Corporation | Folder Guard Passwords |
| FLKW file extension | NewSoftwares Inc. | Folder Lock Encrypted |
| FPENC file extension | FileProtect | FileProtect Encrypted Format |
| FSM file extension | Basta Computing | Splitty Master Split Format |
| FSS file extension | Basta Computing | Splitty Data Split Format |
| FVE file extension | Microsoft Corporation | Windows BitLocker Full Volume Encryption |
| GIFENX file extension | Egis Technology Inc. | Egis Encrypted GIF |
| GTE file extension | GigaTrust | GigaTrust Protected |
| GXK file extension | Galaxkey | Galaxkey File Manager Encrypted Format |
| HBX file extension | N/A | BinHex Encoded Format |
| HDE file extension | Wagers & Associates, Inc. | NAUPA File Encryptor Encrypted |
| HEX file extension | BinHex | Hex Dump Format |
| HID2 file extension | N/A | KeepSafe Encrypted |
| HOP file extension | Hippon SAS | Hippon Protected |
| HQX file extension | N/A | Macintosh BinHex Archive |
| HTMLENX file extension | Egis Technology Inc. | Egis Encrypted HTML |
| HTPASSWD file extension | N/A | Apache Password Format |
| IBE file extension | IBECrypto Team | IBECrypto Encrypted |
| ICP file extension | Identity Compass International | Identity Compass Encrypted Profile |
| IVEX file extension | Worldviz | Worldviz Vizard Encrypted |
| JAC file extension | Kai Kretschmann | JaStaCry Encrypted Format |
| JCRYPT file extension | JMasters | JCRYPT Encrypted Format |
| JPEGENX file extension | Egis Technology Inc. | Egis Encrypted JPEG |
| JPGENX file extension | Egis Technology Inc. | Egis Encrypted JPG |
| JPGX file extension | Egis Technology Inc. | Egis Encrypted JPG Bitmap Image |
| JPI file extension | Elfin Sp. z o.o. | Jupiter Encrypted XML |
| JRL file extension | TAN$TAAFL Software Company | Top Secret Crypto Gold Top Secret Journal |
| JSN file extension | JetSoft Co. | Shield Now Shield |
| K2P file extension | Inv Softworks LLC. | Kryptel Encrypted |
| KDE file extension | Kaspersky Labs | Kaspersky KryptoStorage Encrypted Format |
| KLQ file extension | Kaspersky | Kaspersky Anti-Virus Quarantine Format |
| KSD file extension | N/A | KeepSafe Encrypted |
| LASTLOGIN file extension | N/A | Minecraft User Settings Format |
| LCN file extension | Trymedia Systems, Inc. | License Format |
| LF file extension | SoftwareKey | SoftwareKey License |
| LGB file extension | Intuit Inc. | QuickBooks Little Green Box |
| LOCK3 file extension | BlackBerry (Research In Motion Limited) | BlackBerry Encrypted 3GP |
| LOK file extension | N/A | FileWrangler Encrypted Archive |
| LVIVT file extension | Lvivtotoro | Lvivtotoro Game Format |
| LXV file extension | Lexar Media, Inc. | Lexar Secure II Encrypted Archive |
| MACS file extension | inoage GmbH | MADRIX Encrypted Script |
| MCK file extension | NewSoftwares.net, Inc. | Macro Keys Encrypted Macro |
| MCRP file extension | Bermin Software | MobyExplorer Encrypted Format |
| MEO file extension | NCH Software | MEO Encrypted Format |
| MFS file extension | EnderUNIX | MetFS Encrypted FUSE Based Formatsystem Format |
| MHTENX file extension | Egis Technology Inc. | Egis Encrypted HTM |
| MHTMLENX file extension | Egis Technology Inc. | Egis Encrypted MHTML |
| MIM file extension | Internet Engineering Task Force | Multi-Purpose Internet Mail Extensions Format |
| MIME file extension | The Internet Engineering Task Force | Multi-Purpose Internet Mail Extensions (MIME) File Format Format (RFC822) |
| MJD file extension | Adobe Systems | Adobe Acrobat MIME Encoded Job Definition Format |
| MKEY file extension | CompeGPS TEAM S.L. | CompeGPS Land Registration Key |
| MKEYB file extension | CompeGPS TEAM S.L. | CompeGPS Land Registration Key |
| MME file extension | N/A | Multipurpose Internet Mail Extensions Format |
| MNC file extension | Autodesk | AutoCAD Compiled Menu Format |
| MONO file extension | SourceForge.net | Monolith Munged Encoded |
| MSE file extension | Autodesk | 3D Studio Max Encrypted MAXScript Format |
| NIP file extension | Microsoft Corporation | Microsoft DRM (Digital Right Management) |
| OPEF file extension | Softex Incorporated | OmniPass Encrypted Folder |
| P7E file extension | N/A | SecureSoft Encrypted |
| P7X file extension | Microsoft Corporation | Application Digital Certificate |
| P7Z file extension | N/A | S/MIME Compressed Message |
| PACK file extension | Oracle | Pack200 Packed Jar Format |
| PCXM file extension | Microsoft Corporation | SQL Server Encrypted Forms Backup |
| PDC file extension | LockLizard | Lizard Safeguard Secure PDF Format |
| PDFENX file extension | Egis Technology Inc. | Egis Encrypted PDF |
| PKCS12 file extension | N/A | Personal Information Exchange |
| PKEY file extension | Elcor Software | PowerKey Encrypted Format |
| PKK file extension | Simon Tatham | PuTTYgen Private Key |
| PKR file extension | PGP Corporation | Pretty Good Privacy Public Keyring |
| POTMENX file extension | N/A | Egis Encrypted PowerPoint POTM |
| PP7M file extension | Entrust | Entrust Entelligence Security Provider Password-encrypted |
| PPENC file extension | Ashampoo GmbH & Co. KG | Ashampoo Magical Security Encrypted |
| PPSXENX file extension | N/A | Egis Encrypted PowerPoint PPSX |
| PPTENX file extension | N/A | Egis Encrypted Powerpoint PPT |
| PPTXENX file extension | N/A | Egis Encrypted Powerpoint PPTX |
| PRVKR file extension | PGP Corporation | Pretty Good Privacy Private Keyring |
| PSW6 file extension | AceBIT | Password Depot 6 Format |
| PUF file extension | Briggs Softworks | Puffer Encrypted Format |
| QZE file extension | Leung Yat Chun Joseph | QZip Encrypted |
| RAE file extension | Schlichtherle IT Services | TrueZIP Encrypted ZIP Archive |
| RAES file extension | Schlichtherle IT Services | TrueZIP Encrypted ZIP Archive |
| RARENX file extension | Egis Technology Inc. | Egis Encrypted RAR |
| RBB file extension | TAN$TAAFL Software Company | Top Secret Crypto Gold Random Bits Bin |
| RPZ file extension | SAP AG | Crystal Reports ZIP Compressed And Encrypted Report |
| RSDF file extension | RapidShare | RapidShare Download Settings Format |
| RZK file extension | Red Zion | Red Zion Key Format |
| RZX file extension | Red Zion | File Crypt Encrypted Format |
| S1J file extension | N/A | Sealed |
| SAA file extension | Information Security Corp. | SecretAgent Encrypted Archive |
| SAFE file extension | NumeroLogic Systems, LLC. | ECypher Cryptographic Container |
| SDE file extension | Steganos Software GmbH | Steganos Disk Encryption |
| SDO file extension | Signere.no | Signere.no Signed Document |
| SDOC file extension | Oracle | Microsoft Word Sealed Document Format |
| SEF file extension | XenoSystems | Encryptafile Digital Signature Format |
| SGZ file extension | Sigza Authentication Systems | Sigza’s SigzaLock Encrypted Format |
| SHY file extension | Dr. Bootz | ShyFile Encrypted Format |
| SIGN file extension | Free Software Foundation, Inc. | GNU Privacy Guard |
| SIGNED file extension | Apple, Inc. | Apple Safari |
| SJPG file extension | Oracle Corporation | Sealed JPG |
| SKA file extension | PGP Corporation | Pretty Good Privacy (PGP) Secret Keyring |
| SMBP file extension | Amazon.com, Inc. | Mobipocket EBook Secured Auxiliary |
| SME file extension | Smartsoft | SmartEncryptor Encrypted Archive |
| SMHT file extension | Oracle Corporation | Sealed MHT Archive |
| SNK file extension | Microsoft | Microsoft Visual Studio Strong Name Key Format |
| SPD file extension | Oracle | Sealed Acrobat Document |
| SPDF file extension | Oracle | Sealed PDF Document Format |
| SPN file extension | Oracle Corporation | Sealed PNG Graphic |
| SPPT file extension | Oracle Corporation | Sealed Microsoft PowerPoint Presentation |
| STXT file extension | Oracle Corporation | Sealed Text Document |
| SUF file extension | Peter Selinger | Ccrypt Encrypted Format |
| SVZ file extension | Actual Code Ltd. | Savez |
| SWITCH file extension | Egress Software Technologies | Egress Switch Package Format |
| SXL file extension | N/A | Sealed Excel Worksheet |
| TXTENX file extension | Egis Technology Inc. | Egis Encrypted TXT |
| TZP file extension | Schlichtherle IT Services | TrueZIP Ecnrypted JAR Java |
| UEA file extension | AuthenTec | Protector Suite QL Format |
| UEED file extension | Uconomix Technologies | Uconomix Encryption Engine Encrypted Directory |
| UENC file extension | IDM Computer Solutions, Inc. | UltraEdit Encrypted Text |
| UHH file extension | Eurotherm UK | Eurotherm Hydra History Encrypted |
| UU file extension | N/A | Uuencoded (compressed) File Archive (ascii) |
| UUD file extension | N/A | UUDecoded Format |
| UUE file extension | N/A | UUEncoded Format |
| V2C file extension | WellSight Systems Inc. | WellSight Systems HASP SRM License Information |
| VDATA file extension | Squid Tooth | Vaulty Hide Picture Image Format |
| VF3 file extension | VaultletSoft Inc. | Vaultlet Suite Encrypted |
| VLT file extension | WinVault | WinVault File Archive |
| VMDF file extension | Egis Technology Inc. | MyWinLocker Encrypted Virtual Drive |
| VME file extension | MEGANET Corporation | Virtual Matrix Encryption |
| VP file extension | Accellera | Verilog Encrypted Source Code Format |
| VSF file extension | Voltage Security, Inc. | Voltage SecureFile Encrypted |
| WMG file extension | WinMagic Inc. | SecureDoc Encrypted Hard Drive Control |
| WPE file extension | Corel | WordPerfect Entrust Document |
| WZA file extension | SPI | Encryption Wizard Archive |
| XCON file extension | Ankit Malhotra | Conceal Encrypted Data |
| XDC file extension | TOTALCMD.NET | Total Commander With DarkCrypt IV Plug-in Encrypted |
| XFI file extension | xICE.NET | XICE Desktop Encrypted |
| XLAMENX file extension | Egis Technology Inc. | Egis Encrypted Excel XLAM |
| XLSENX file extension | Egis Technology Inc. | Egis Encrypted Excel XLS |
| XLSXENX file extension | Egis Technology Inc. | Egis Encrypted Excel XLSX |
| XXE file extension | N/A | XXEncoded Format |
| Y8PD file extension | Spotmau Corporation | Password Finder Yahoo! Mail / Yahoo! Messenger Exported Password |
| YENC file extension | N/A | YEnc Encoded Archive |
| YNC file extension | N/A | YEnc Encoded Format |
| ZBB file extension | ZEMAX Development Corporation | ZEMAX Black Box |
| ZIPENX file extension | Egis Technology Inc. | Egis Encrypted ZIP |
| ZPS file extension | Zebra Digital Assets | Zebra Portable Safe Format |
| ZXN file extension | A1Yippee.net | PhotoEncrypt Encrypted Photo |
| ___FPE file extension | ZQS Software | Folder Password Expert Protected Folder |
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