#Ipasssafe for pc password#
#Ipasssafe for pc verification#
Password verification requires 2 x SHA-256.Decryption with random key produces valid padding with p ≈ 2-8 (0.4%) BlackBerry Wallet “Designed for BlackBerry smartphones, BlackBerry Wallet helps make mobile, online purchasing faster and easier”.After decryption padding verified and removed.Padding value = number of bytes appended PKCS7 padding bytes 7 7 7 7 7 7 7 3 3 3 6 6 6 6 6 6 2 2 5 5 5 5 5 1 4 4 4 4 D a t a B y t e 8 8 8 8 8 8 8 8 Block size PKCS7 padding bytes.Done even if block size divides plaintext length.~5M passwords/sec on a CPU, ~20M with GPU PKCS7 Padding Plaintext padded to completely fill last block.Survived keys are checked by verifying SHA-1 Encrypted payload Data SHA1 (Data).Allows to quickly reject wrong keys (p ≈ 2-8).
Key is calculated by PBKDF2-SHA1 with 3 iterations.Version 1.0 (for OS 5) BlackBerry Password Keeper.Summary & Conclusions BlackBerry Applications.Via physical imaging (up to iPhone 4) BlackBerry:.Via afc (need passcode or iTunes pairing).PBKDF2-SHA1 with 20’000 iterations Database FilesĪpple iOS:.PBKDF2-SHA1 with 10’000 iterations BlackBerry:.Optional encryption (enforced by device).Need device passcode or iTunes pairing.Do you really know where exactly your phone is right now? Someone just got physical access to the device Device BackupĪpple iOS: Lots of phones go in wrong hands every year. You know where it is (well, most of the time). Extract passwords stored by those managers Are those assumptions fair at all? Physical Access Computers are relatively big.Recover master password for password manager(s) on the mobile device.Access to password manager database file 2.Summary & Conclusions Threat Model Assumptions: 1.
#Ipasssafe for pc Pc#
Smartphone requires stronger password protection than PC but provides less capabilities for doing so! Agenda.
Handling passwords on smartphone is more difficult than on PC.PC Smartphone Password entered not Password entered every too often (usually just time you need access after unlocking data (after switching console) applications or after short time-out) Offline attacks can utilize GPUs for attackers’ advantage Authentication Wrap Up Can do complex password-to-key transforms Password HandlingPassword Cracking.Complex password- to-key transforms will impact usability.It is fair to assume that passwords on the smartphones are shorter than their PC counterparts Password Cracking Smartphone: Long and complex passwords are hard Password Typing.Long and complex passwords are easy Smartphone:.“Lock patterns” are essentially numeric passcodes Password Typing Password is the only option on the smartphones Password/Passphrase Authentication: Smartphone.Summary & Conclusions Authentication: PC.
March 19th – 23rd 2012 Heidelberg, Germany Dmitry Sklyarov Andrey Belenko Agenda Secure Password Managers” and “Military-Grade Encryption” on Smartphones: Oh, Really?
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