Cascades of ciphers

AES-Twofish

Two ciphers in a cascade [15, 16] operating in XTS mode (see the section +Modes of Operation). Each 128-bit block is first encrypted with Twofish (256-bit key) in XTS mode and then with AES (256-bit key) in XTS mode. Each of the cascaded ciphers uses its own key. All encryption keys are mutually independent (note that + header keys are independent too, even though they are derived from a single password – see +Header Key Derivation, Salt, and Iteration Count). See above for information on the individual cascaded ciphers.

AES-Twofish-Serpent

Three ciphers in a cascade [15, 16] operating in XTS mode (see the section +Modes of Operation). Each 128-bit block is first encrypted with Serpent (256-bit key) in XTS mode, then with Twofish (256-bit key) in XTS mode, and finally with AES (256-bit key) in XTS mode. Each of the cascaded ciphers uses its own key. All encryption + keys are mutually independent (note that header keys are independent too, even though they are derived from a single password – see the section +Header Key Derivation, Salt, and Iteration Count). See above for information on the individual cascaded ciphers.

Serpent-AES

Two ciphers in a cascade [15, 16] operating in XTS mode (see the section +Modes of Operation). Each 128-bit block is first encrypted with AES (256-bit key) in XTS mode and then with Serpent (256-bit key) in XTS mode. Each of the cascaded ciphers uses its own key. All encryption keys are mutually independent (note that + header keys are independent too, even though they are derived from a single password – see the section +Header Key Derivation, Salt, and Iteration Count). See above for information on the individual cascaded ciphers.

Serpent-Twofish-AES

Three ciphers in a cascade [15, 16] operating in XTS mode (see the section +Modes of Operation). Each 128-bit block is first encrypted with AES (256-bit key) in XTS mode, then with Twofish (256- bit key) in XTS mode, and finally with Serpent (256-bit key) in XTS mode. Each of the cascaded ciphers uses its own key. All + encryption keys are mutually independent (note that header keys are independent too, even though they are derived from a single password – see the section +Header Key Derivation, Salt, and Iteration Count). See above for information on the individual cascaded ciphers.

Twofish-Serpent

Two ciphers in a cascade [15, 16] operating in XTS mode (see the section +Modes of Operation). Each 128-bit block is first encrypted with Serpent (256-bit key) in XTS mode and then with Twofish (256-bit key) in XTS mode. Each of the cascaded ciphers uses its own key. All encryption keys are mutually independent (note + that header keys are independent too, even though they are derived from a single password – see the section +Header Key Derivation, Salt, and Iteration Count). See above for information on the individual cascaded ciphers.