Abstract: Adapting a mobile or other application (“app”) to a partitioned environment is disclosed. In various embodiments, a “secure zone” or other logical partition is created and enforced at least in part by adapting a mobile or other app to behave in a manner required by and/or otherwise associated with the secure zone or other partition and which behavior is or in various embodiments may be different than a native behavior of the mobile or other app as designed and written by an application developer of the app.

Abstract: Mobile device data encryption is disclosed. A file is divided into a plurality of data blocks. The data blocks are encrypted. An authentication value is generated for each encrypted data block. The encrypted data blocks are stored in a tree data structure including the encrypted data blocks and a header block. The header block includes a set of authentication values and an aggregate authentication value. Each authentication value in the set of authentication values is derived from one or more of the encrypted data blocks. The aggregate authentication value is generated based at least in part on the set of authentication values. In various embodiments, the tree data structure may include one or more levels of internal nodes including authentication blocks.

Abstract: Mobile device key management is disclosed. A master key is secured using a password-based key to generate a first encryption information. The password-based key is generated based at least in part on a password associated with a mobile device. The master key is also secured using an unlock key to generate a second encryption information. The unlock key is stored at a server, and in certain cases is not stored on the mobile device. The first encryption information and the second encryption information are stored on the mobile device. The mobile device is configured to extract the master key from the first encryption information using the password. In the event that the master key is not extracted using the password, the mobile device is configured to extract the master key from the second encryption information using the unlock key received from the server.

Abstract: Adapting a mobile or other application (“app”) to a partitioned environment is disclosed. In various embodiments, a “secure zone” or other logical partition is created and enforced at least in part by adapting a mobile or other app to behave in a manner required by and/or otherwise associated with the secure zone or other partition and which behavior is or in various embodiments may be different than a native behavior of the mobile or other app as designed and written by an application developer of the app.

Abstract: Adapting a mobile or other application (“app”) to a partitioned environment is disclosed. In various embodiments, a “secure zone” or other logical partition is created and enforced at least in part by adapting a mobile or other app to behave in a manner required by and/or otherwise associated with the secure zone or other partition and which behavior is or in various embodiments may be different than a native behavior of the mobile or other app as designed and written by an application developer of the app.

Abstract: Providing secure access to a mobile or other device using a network-assisted PIN or other short password is disclosed. In various embodiments, upon entry by a user of a personal identification number (PIN) or other short password, the password and a unique identifier, such as a user and/or device identifier, and/or other data, are sent to a remote server. The remote server returns to the mobile or other device a cryptographic key and/or other data, such as a more secure (e.g., more characters and/or including characters drawn from a larger set of characters) password usable at the mobile device to access encrypted data.